diff --git a/OWNERS b/OWNERS
index 3a1a038..a53d83e 100644
--- a/OWNERS
+++ b/OWNERS
@@ -9,6 +9,3 @@
 
 # historical/backup
 maco@google.com
-
-# vts tests
-guangzhu@google.com
diff --git a/automotive/vehicle/TEST_MAPPING b/automotive/vehicle/TEST_MAPPING
index fa0b791..da8416c 100644
--- a/automotive/vehicle/TEST_MAPPING
+++ b/automotive/vehicle/TEST_MAPPING
@@ -7,6 +7,15 @@
       "name": "VehicleHalDefaultConfigTest"
     },
     {
+      "name": "VehicleHalDefaultConfigTestEnableTestProperties"
+    },
+    {
+      "name": "JsonConfigLoaderUnitTest"
+    },
+    {
+      "name": "JsonConfigLoaderUnitTestEnableTestProperties"
+    },
+    {
       "name": "VehicleHalVehicleUtilsTest"
     },
     {
diff --git a/automotive/vehicle/aidl/android/hardware/automotive/vehicle/VehicleProperty.aidl b/automotive/vehicle/aidl/android/hardware/automotive/vehicle/VehicleProperty.aidl
index e8a6c85..1cf8aff 100644
--- a/automotive/vehicle/aidl/android/hardware/automotive/vehicle/VehicleProperty.aidl
+++ b/automotive/vehicle/aidl/android/hardware/automotive/vehicle/VehicleProperty.aidl
@@ -542,7 +542,7 @@
      */
     TRACTION_CONTROL_ACTIVE = 0x040B + 0x10000000 + 0x01000000
             + 0x00200000, // VehiclePropertyGroup:SYSTEM,VehicleArea:GLOBAL,VehiclePropertyType:BOOLEAN
-    /*
+    /**
      * HVAC Properties
      *
      * Additional rules for mapping a zoned HVAC property (except
diff --git a/automotive/vehicle/aidl/impl/default_config/Android.bp b/automotive/vehicle/aidl/impl/default_config/Android.bp
index 0feaf23..aa22d87 100644
--- a/automotive/vehicle/aidl/impl/default_config/Android.bp
+++ b/automotive/vehicle/aidl/impl/default_config/Android.bp
@@ -25,7 +25,13 @@
     export_include_dirs: ["include"],
     defaults: ["VehicleHalDefaults"],
     static_libs: ["VehicleHalUtils"],
-    header_libs: ["VehicleHalTestUtilHeaders"],
+    header_libs: [
+        "VehicleHalJsonConfigLoaderHeaders",
+        "VehicleHalTestUtilHeaders",
+    ],
     export_static_lib_headers: ["VehicleHalUtils"],
-    export_header_lib_headers: ["VehicleHalTestUtilHeaders"],
+    export_header_lib_headers: [
+        "VehicleHalTestUtilHeaders",
+        "VehicleHalJsonConfigLoaderHeaders",
+    ],
 }
diff --git a/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/Android.bp b/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/Android.bp
new file mode 100644
index 0000000..6984d5e
--- /dev/null
+++ b/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/Android.bp
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+cc_library {
+    name: "VehicleHalJsonConfigLoader",
+    vendor: true,
+    srcs: ["src/*.cpp"],
+    local_include_dirs: ["include"],
+    export_include_dirs: ["include"],
+    defaults: ["VehicleHalDefaults"],
+    static_libs: ["VehicleHalUtils"],
+    header_libs: [
+        "IVehicleGeneratedHeaders",
+    ],
+    shared_libs: ["libjsoncpp"],
+}
+
+cc_library {
+    name: "VehicleHalJsonConfigLoaderEnableTestProperties",
+    vendor: true,
+    srcs: ["src/*.cpp"],
+    local_include_dirs: ["include"],
+    export_include_dirs: ["include"],
+    defaults: ["VehicleHalDefaults"],
+    static_libs: ["VehicleHalUtils"],
+    header_libs: [
+        "VehicleHalTestUtilHeaders",
+        "IVehicleGeneratedHeaders",
+    ],
+    cflags: ["-DENABLE_VEHICLE_HAL_TEST_PROPERTIES"],
+    shared_libs: ["libjsoncpp"],
+}
+
+cc_library_headers {
+    name: "VehicleHalJsonConfigLoaderHeaders",
+    vendor: true,
+    local_include_dirs: ["include"],
+    export_include_dirs: ["include"],
+    defaults: ["VehicleHalDefaults"],
+    static_libs: ["VehicleHalUtils"],
+    header_libs: [
+        "IVehicleGeneratedHeaders",
+    ],
+    shared_libs: ["libjsoncpp"],
+}
diff --git a/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/include/ConfigDeclaration.h b/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/include/ConfigDeclaration.h
new file mode 100644
index 0000000..40ac129
--- /dev/null
+++ b/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/include/ConfigDeclaration.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef android_hardware_automotive_vehicle_aidl_impl_default_config_JsonConfigLoader_include_ConfigDeclaration_H_
+#define android_hardware_automotive_vehicle_aidl_impl_default_config_JsonConfigLoader_include_ConfigDeclaration_H_
+
+#include <VehicleHalTypes.h>
+
+#include <unordered_map>
+
+namespace android {
+namespace hardware {
+namespace automotive {
+namespace vehicle {
+
+// ConfigDeclaration represents one property config, its optional initial value and its optional
+// area configs and initial values for each area.
+struct ConfigDeclaration {
+    aidl::android::hardware::automotive::vehicle::VehiclePropConfig config;
+
+    // This value will be used as an initial value for the property. If this field is specified for
+    // property that supports multiple areas then it will be used for all areas unless particular
+    // area is overridden in initialAreaValue field.
+    aidl::android::hardware::automotive::vehicle::RawPropValues initialValue;
+    // Use initialAreaValues if it is necessary to specify different values per each area.
+    std::unordered_map<int32_t, aidl::android::hardware::automotive::vehicle::RawPropValues>
+            initialAreaValues;
+
+    inline bool operator==(const ConfigDeclaration& other) const {
+        return (config == other.config && initialValue == other.initialValue &&
+                initialAreaValues == other.initialAreaValues);
+    }
+
+    friend std::ostream& operator<<(std::ostream& os, const ConfigDeclaration& c) {
+        return os << "Config Declaration for property: "
+                  << aidl::android::hardware::automotive::vehicle::toString(
+                             static_cast<
+                                     aidl::android::hardware::automotive::vehicle::VehicleProperty>(
+                                     c.config.prop));
+    }
+};
+
+}  // namespace vehicle
+}  // namespace automotive
+}  // namespace hardware
+}  // namespace android
+
+#endif  // android_hardware_automotive_vehicle_aidl_impl_default_config_JsonConfigLoader_include_ConfigDeclaration_H_
diff --git a/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/include/JsonConfigLoader.h b/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/include/JsonConfigLoader.h
new file mode 100644
index 0000000..fd73a26
--- /dev/null
+++ b/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/include/JsonConfigLoader.h
@@ -0,0 +1,170 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef android_hardware_automotive_vehicle_aidl_impl_default_config_JsonConfigLoader_include_JsonConfigLoader_H_
+#define android_hardware_automotive_vehicle_aidl_impl_default_config_JsonConfigLoader_include_JsonConfigLoader_H_
+
+#include <ConfigDeclaration.h>
+#include <VehicleHalTypes.h>
+
+#include <android-base/result.h>
+#include <json/json.h>
+#include <unordered_map>
+#include <utility>
+#include <vector>
+
+namespace android {
+namespace hardware {
+namespace automotive {
+namespace vehicle {
+
+// private namespace
+namespace jsonconfigloader_impl {
+
+// An abstract interface that represents a ValueParser for any constant value types.
+class ConstantParserInterface {
+  public:
+    // Parses a constant variable name to its actual value.
+    virtual android::base::Result<int> parseValue(const std::string& name) const = 0;
+    virtual ~ConstantParserInterface() = default;
+};
+
+// A class to parse a value field in JSON config file.
+// If the field is a string and the field is in the format of "XX::XX", the value will be parsed
+// as a constant value in the format of "TYPE::NAME". Otherwise, the field will be return as is
+// converted to the expected type.
+class JsonValueParser final {
+  public:
+    JsonValueParser();
+
+    android::base::Result<std::string> parseStringValue(const std::string& fieldName,
+                                                        const Json::Value& value) const;
+
+    template <class T>
+    android::base::Result<std::vector<T>> parseArray(const std::string& fieldName,
+                                                     const Json::Value& value) const;
+
+    template <class T>
+    android::base::Result<T> parseValue(const std::string& fieldName,
+                                        const Json::Value& value) const;
+
+  private:
+    template <class T>
+    static android::base::Result<T> convertValueToType(const std::string& fieldName,
+                                                       const Json::Value& value);
+
+    std::optional<std::pair<std::string, std::string>> maybeGetTypeAndValueName(
+            const std::string& jsonFieldValue) const;
+
+    android::base::Result<int> parseConstantValue(
+            const std::pair<std::string, std::string>& typeValueName) const;
+
+    const ConstantParserInterface* getParser(const std::string& type) const {
+        auto it = mConstantParsersByType.find(type);
+        if (it == mConstantParsersByType.end()) {
+            return nullptr;
+        }
+        return it->second.get();
+    }
+
+  private:
+    inline static const std::string DELIMITER = "::";
+    std::unordered_map<std::string, std::unique_ptr<ConstantParserInterface>>
+            mConstantParsersByType;
+};
+
+// The main class to parse a VHAL config file in JSON format.
+class JsonConfigParser {
+  public:
+    android::base::Result<std::vector<ConfigDeclaration>> parseJsonConfig(std::istream& is);
+
+  private:
+    JsonValueParser mValueParser;
+
+    // Parses configuration for each property.
+    std::optional<ConfigDeclaration> parseEachProperty(const Json::Value& propJsonValue,
+                                                       std::vector<std::string>* errors);
+    // Tries to parse a JSON value to a specific type.
+    //
+    // If fieldIsOptional is True, then if the field specified by "fieldName" does not exist,
+    // this method will return true without doing anything, otherwise, it will return false.
+    //
+    // @param parentJsonNode The parent node of the field you are going to parse.
+    // @param fieldName The name for the field.
+    // @param fieldIsOptional Whether the field is optional.
+    // @param outPtr The pointer to output to if the field exists and parsing succeeded.
+    // @param errors The error array to append error to if errors are found.
+    // @return true if the field is optional and does not exist or parsed successfully.
+    template <class T>
+    bool tryParseJsonValueToVariable(const Json::Value& parentJsonNode,
+                                     const std::string& fieldName, bool fieldIsOptional, T* outPtr,
+                                     std::vector<std::string>* errors);
+    // Tries to parse a JSON value to an array of specific type.
+    //
+    // If fieldIsOptional is True, then if the field specified by "fieldName" does not exist,
+    // this method will return true without doing anything, otherwise, it will return false.
+    //
+    // @param parentJsonNode The parent node of the field you are going to parse.
+    // @param fieldName The name for the field.
+    // @param fieldIsOptional Whether the field is optional.
+    // @param outPtr The pointer to output to if the field exists and parsing succeeded.
+    // @param errors The error array to append error to if errors are found.
+    // @return true if the field is optional and does not exist or parsed successfully.
+    template <class T>
+    bool tryParseJsonArrayToVariable(const Json::Value& parentJsonNode,
+                                     const std::string& fieldName, bool fieldIsOptional,
+                                     std::vector<T>* outPtr, std::vector<std::string>* errors);
+    // Parses a JSON field to VehiclePropertyAccess or VehiclePropertyChangeMode.
+    template <class T>
+    void parseAccessChangeMode(
+            const Json::Value& parentJsonNode, const std::string& fieldName, int propId,
+            const std::string& propStr,
+            const std::unordered_map<aidl::android::hardware::automotive::vehicle::VehicleProperty,
+                                     T>& defaultMap,
+            T* outPtr, std::vector<std::string>* errors);
+
+    // Parses a JSON field to RawPropValues.
+    //
+    // @return True if the field exist and can be parsed to a RawPropValues.
+    bool parsePropValues(const Json::Value& parentJsonNode, const std::string& fieldName,
+                         aidl::android::hardware::automotive::vehicle::RawPropValues* outPtr,
+                         std::vector<std::string>* errors);
+
+    // Prase a JSON field as an array of area configs.
+    void parseAreas(const Json::Value& parentJsonNode, const std::string& fieldName,
+                    ConfigDeclaration* outPtr, std::vector<std::string>* errors);
+};
+
+}  // namespace jsonconfigloader_impl
+
+// A class to load vehicle property configs and initial values in JSON format.
+class JsonConfigLoader final {
+  public:
+    JsonConfigLoader();
+
+    // Loads a JSON file stream and parses it to a list of ConfigDeclarations.
+    android::base::Result<std::vector<ConfigDeclaration>> loadPropConfig(std::istream& is);
+
+  private:
+    std::unique_ptr<jsonconfigloader_impl::JsonConfigParser> mParser;
+};
+
+}  // namespace vehicle
+}  // namespace automotive
+}  // namespace hardware
+}  // namespace android
+
+#endif  // android_hardware_automotive_vehicle_aidl_impl_default_config_JsonConfigLoader_include_JsonConfigLoader_H_
diff --git a/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/src/JsonConfigLoader.cpp b/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/src/JsonConfigLoader.cpp
new file mode 100644
index 0000000..392d540
--- /dev/null
+++ b/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/src/JsonConfigLoader.cpp
@@ -0,0 +1,547 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <JsonConfigLoader.h>
+
+#include <AccessForVehicleProperty.h>
+#include <ChangeModeForVehicleProperty.h>
+#include <PropertyUtils.h>
+
+#ifdef ENABLE_VEHICLE_HAL_TEST_PROPERTIES
+#include <TestPropertyUtils.h>
+#endif  // ENABLE_VEHICLE_HAL_TEST_PROPERTIES
+
+#include <android-base/strings.h>
+
+namespace android {
+namespace hardware {
+namespace automotive {
+namespace vehicle {
+
+namespace jsonconfigloader_impl {
+
+using ::aidl::android::hardware::automotive::vehicle::AccessForVehicleProperty;
+using ::aidl::android::hardware::automotive::vehicle::ChangeModeForVehicleProperty;
+using ::aidl::android::hardware::automotive::vehicle::EvConnectorType;
+using ::aidl::android::hardware::automotive::vehicle::EvsServiceState;
+using ::aidl::android::hardware::automotive::vehicle::EvsServiceType;
+using ::aidl::android::hardware::automotive::vehicle::FuelType;
+using ::aidl::android::hardware::automotive::vehicle::GsrComplianceRequirementType;
+using ::aidl::android::hardware::automotive::vehicle::RawPropValues;
+using ::aidl::android::hardware::automotive::vehicle::VehicleApPowerStateReport;
+using ::aidl::android::hardware::automotive::vehicle::VehicleApPowerStateReq;
+using ::aidl::android::hardware::automotive::vehicle::VehicleAreaConfig;
+using ::aidl::android::hardware::automotive::vehicle::VehicleAreaMirror;
+using ::aidl::android::hardware::automotive::vehicle::VehicleAreaWindow;
+using ::aidl::android::hardware::automotive::vehicle::VehicleGear;
+using ::aidl::android::hardware::automotive::vehicle::VehicleHvacFanDirection;
+using ::aidl::android::hardware::automotive::vehicle::VehicleIgnitionState;
+using ::aidl::android::hardware::automotive::vehicle::VehicleOilLevel;
+using ::aidl::android::hardware::automotive::vehicle::VehiclePropConfig;
+using ::aidl::android::hardware::automotive::vehicle::VehicleProperty;
+using ::aidl::android::hardware::automotive::vehicle::VehiclePropertyAccess;
+using ::aidl::android::hardware::automotive::vehicle::VehiclePropertyChangeMode;
+using ::aidl::android::hardware::automotive::vehicle::VehicleSeatOccupancyState;
+using ::aidl::android::hardware::automotive::vehicle::VehicleTurnSignal;
+using ::aidl::android::hardware::automotive::vehicle::VehicleUnit;
+using ::aidl::android::hardware::automotive::vehicle::VehicleVendorPermission;
+
+using ::android::base::Error;
+using ::android::base::Result;
+
+// Defines a map from constant names to constant values, the values defined here corresponds to
+// the "Constants::XXXX" used in JSON config file.
+const std::unordered_map<std::string, int> CONSTANTS_BY_NAME = {
+        {"DOOR_1_RIGHT", DOOR_1_RIGHT},
+        {"DOOR_1_LEFT", DOOR_1_LEFT},
+        {"DOOR_2_RIGHT", DOOR_2_RIGHT},
+        {"DOOR_2_LEFT", DOOR_2_LEFT},
+        {"DOOR_REAR", DOOR_REAR},
+        {"HVAC_ALL", HVAC_ALL},
+        {"HVAC_LEFT", HVAC_LEFT},
+        {"HVAC_RIGHT", HVAC_RIGHT},
+        {"VENDOR_EXTENSION_INT_PROPERTY", VENDOR_EXTENSION_INT_PROPERTY},
+        {"VENDOR_EXTENSION_BOOLEAN_PROPERTY", VENDOR_EXTENSION_BOOLEAN_PROPERTY},
+        {"VENDOR_EXTENSION_STRING_PROPERTY", VENDOR_EXTENSION_STRING_PROPERTY},
+        {"VENDOR_EXTENSION_FLOAT_PROPERTY", VENDOR_EXTENSION_FLOAT_PROPERTY},
+        {"WINDOW_1_LEFT", WINDOW_1_LEFT},
+        {"WINDOW_1_RIGHT", WINDOW_1_RIGHT},
+        {"WINDOW_2_LEFT", WINDOW_2_LEFT},
+        {"WINDOW_2_RIGHT", WINDOW_2_RIGHT},
+        {"WINDOW_ROOF_TOP_1", WINDOW_ROOF_TOP_1},
+        {"WINDOW_1_RIGHT_2_LEFT_2_RIGHT", WINDOW_1_RIGHT | WINDOW_2_LEFT | WINDOW_2_RIGHT},
+        {"SEAT_1_LEFT", SEAT_1_LEFT},
+        {"SEAT_1_RIGHT", SEAT_1_RIGHT},
+        {"SEAT_2_LEFT", SEAT_2_LEFT},
+        {"SEAT_2_RIGHT", SEAT_2_RIGHT},
+        {"SEAT_2_CENTER", SEAT_2_CENTER},
+        {"WHEEL_REAR_RIGHT", WHEEL_REAR_RIGHT},
+        {"WHEEL_REAR_LEFT", WHEEL_REAR_LEFT},
+        {"WHEEL_FRONT_RIGHT", WHEEL_FRONT_RIGHT},
+        {"WHEEL_FRONT_LEFT", WHEEL_FRONT_LEFT},
+        {"CHARGE_PORT_FRONT_LEFT", CHARGE_PORT_FRONT_LEFT},
+        {"CHARGE_PORT_REAR_LEFT", CHARGE_PORT_REAR_LEFT},
+        {"FAN_DIRECTION_FLOOR", FAN_DIRECTION_FLOOR},
+        {"FAN_DIRECTION_FACE", FAN_DIRECTION_FACE},
+        {"FAN_DIRECTION_DEFROST", FAN_DIRECTION_DEFROST},
+        {"FAN_DIRECTION_FACE_FLOOR", FAN_DIRECTION_FACE | FAN_DIRECTION_FLOOR},
+        {"FAN_DIRECTION_FACE_DEFROST", FAN_DIRECTION_FACE | FAN_DIRECTION_DEFROST},
+        {"FAN_DIRECTION_FLOOR_DEFROST", FAN_DIRECTION_FLOOR | FAN_DIRECTION_DEFROST},
+        {"FAN_DIRECTION_FLOOR_DEFROST_FACE",
+         FAN_DIRECTION_FLOOR | FAN_DIRECTION_DEFROST | FAN_DIRECTION_FACE},
+        {"FUEL_DOOR_REAR_LEFT", FUEL_DOOR_REAR_LEFT},
+        {"LIGHT_STATE_ON", LIGHT_STATE_ON},
+        {"LIGHT_SWITCH_AUTO", LIGHT_SWITCH_AUTO},
+        {"MIRROR_DRIVER_LEFT_RIGHT",
+         toInt(VehicleAreaMirror::DRIVER_LEFT) | toInt(VehicleAreaMirror::DRIVER_RIGHT)},
+#ifdef ENABLE_VEHICLE_HAL_TEST_PROPERTIES
+        // Following are test properties:
+        {"ECHO_REVERSE_BYTES", ECHO_REVERSE_BYTES},
+        {"kMixedTypePropertyForTest", kMixedTypePropertyForTest},
+        {"VENDOR_CLUSTER_NAVIGATION_STATE", VENDOR_CLUSTER_NAVIGATION_STATE},
+        {"VENDOR_CLUSTER_REQUEST_DISPLAY", VENDOR_CLUSTER_REQUEST_DISPLAY},
+        {"VENDOR_CLUSTER_SWITCH_UI", VENDOR_CLUSTER_SWITCH_UI},
+        {"VENDOR_CLUSTER_DISPLAY_STATE", VENDOR_CLUSTER_DISPLAY_STATE},
+        {"VENDOR_CLUSTER_REPORT_STATE", VENDOR_CLUSTER_REPORT_STATE},
+        {"PLACEHOLDER_PROPERTY_INT", PLACEHOLDER_PROPERTY_INT},
+        {"PLACEHOLDER_PROPERTY_FLOAT", PLACEHOLDER_PROPERTY_FLOAT},
+        {"PLACEHOLDER_PROPERTY_BOOLEAN", PLACEHOLDER_PROPERTY_BOOLEAN},
+        {"PLACEHOLDER_PROPERTY_STRING", PLACEHOLDER_PROPERTY_STRING}
+#endif  // ENABLE_VEHICLE_HAL_TEST_PROPERTIES
+};
+
+// A class to parse constant values for type T.
+template <class T>
+class ConstantParser final : public ConstantParserInterface {
+  public:
+    ConstantParser() {
+        for (const T& v : ndk::enum_range<T>()) {
+            std::string name = aidl::android::hardware::automotive::vehicle::toString(v);
+            // We use the same constant for both VehicleUnit::GALLON and VehicleUnit::US_GALLON,
+            // which caused toString() not work properly for US_GALLON. So we explicitly add the
+            // map here.
+            if (name == "GALLON") {
+                mValueByName["US_GALLON"] = toInt(v);
+            }
+            mValueByName[name] = toInt(v);
+        }
+    }
+
+    ~ConstantParser() = default;
+
+    Result<int> parseValue(const std::string& name) const override {
+        auto it = mValueByName.find(name);
+        if (it == mValueByName.end()) {
+            return Error() << "Constant name: " << name << " is not defined";
+        }
+        return it->second;
+    }
+
+  private:
+    std::unordered_map<std::string, int> mValueByName;
+};
+
+// A class to parse constant values defined in CONSTANTS_BY_NAME map.
+class LocalVariableParser final : public ConstantParserInterface {
+  public:
+    ~LocalVariableParser() = default;
+
+    Result<int> parseValue(const std::string& name) const override {
+        auto constantsIt = CONSTANTS_BY_NAME.find(name);
+        if (constantsIt == CONSTANTS_BY_NAME.end()) {
+            return Error() << "Constant variable name: " << name << " is not defined";
+        }
+        return constantsIt->second;
+    }
+};
+
+JsonValueParser::JsonValueParser() {
+    mConstantParsersByType["VehiclePropertyAccess"] =
+            std::make_unique<ConstantParser<VehiclePropertyAccess>>();
+    mConstantParsersByType["VehiclePropertyChangeMode"] =
+            std::make_unique<ConstantParser<VehiclePropertyChangeMode>>();
+    mConstantParsersByType["VehicleGear"] = std::make_unique<ConstantParser<VehicleGear>>();
+    mConstantParsersByType["VehicleAreaWindow"] =
+            std::make_unique<ConstantParser<VehicleAreaWindow>>();
+    mConstantParsersByType["VehicleAreaMirror"] =
+            std::make_unique<ConstantParser<VehicleAreaMirror>>();
+    mConstantParsersByType["VehicleOilLevel"] = std::make_unique<ConstantParser<VehicleOilLevel>>();
+    mConstantParsersByType["VehicleUnit"] = std::make_unique<ConstantParser<VehicleUnit>>();
+    mConstantParsersByType["VehicleSeatOccupancyState"] =
+            std::make_unique<ConstantParser<VehicleSeatOccupancyState>>();
+    mConstantParsersByType["VehicleHvacFanDirection"] =
+            std::make_unique<ConstantParser<VehicleHvacFanDirection>>();
+    mConstantParsersByType["VehicleApPowerStateReport"] =
+            std::make_unique<ConstantParser<VehicleApPowerStateReport>>();
+    mConstantParsersByType["VehicleTurnSignal"] =
+            std::make_unique<ConstantParser<VehicleTurnSignal>>();
+    mConstantParsersByType["VehicleVendorPermission"] =
+            std::make_unique<ConstantParser<VehicleVendorPermission>>();
+    mConstantParsersByType["EvsServiceType"] = std::make_unique<ConstantParser<EvsServiceType>>();
+    mConstantParsersByType["EvsServiceState"] = std::make_unique<ConstantParser<EvsServiceState>>();
+    mConstantParsersByType["EvConnectorType"] = std::make_unique<ConstantParser<EvConnectorType>>();
+    mConstantParsersByType["VehicleProperty"] = std::make_unique<ConstantParser<VehicleProperty>>();
+    mConstantParsersByType["GsrComplianceRequirementType"] =
+            std::make_unique<ConstantParser<GsrComplianceRequirementType>>();
+    mConstantParsersByType["VehicleIgnitionState"] =
+            std::make_unique<ConstantParser<VehicleIgnitionState>>();
+    mConstantParsersByType["FuelType"] = std::make_unique<ConstantParser<FuelType>>();
+    mConstantParsersByType["Constants"] = std::make_unique<LocalVariableParser>();
+}
+
+template <>
+Result<int32_t> JsonValueParser::convertValueToType<int32_t>(const std::string& fieldName,
+                                                             const Json::Value& value) {
+    if (!value.isInt()) {
+        return Error() << "The value: " << value << " for field: " << fieldName
+                       << " is not in correct type, expect int";
+    }
+    return static_cast<int32_t>(value.asInt());
+}
+
+template <>
+Result<float> JsonValueParser::convertValueToType<float>(const std::string& fieldName,
+                                                         const Json::Value& value) {
+    // isFloat value does not exist, so we use isDouble here.
+    if (!value.isDouble()) {
+        return Error() << "The value: " << value << " for field: " << fieldName
+                       << " is not in correct type, expect float";
+    }
+    return value.asFloat();
+}
+
+template <>
+Result<int64_t> JsonValueParser::convertValueToType<int64_t>(const std::string& fieldName,
+                                                             const Json::Value& value) {
+    if (!value.isInt64()) {
+        return Error() << "The value: " << value << " for field: " << fieldName
+                       << " is not in correct type, expect int64";
+    }
+    return static_cast<int64_t>(value.asInt64());
+}
+
+template <>
+Result<std::string> JsonValueParser::convertValueToType<std::string>(const std::string& fieldName,
+                                                                     const Json::Value& value) {
+    if (!value.isString()) {
+        return Error() << "The value: " << value << " for field: " << fieldName
+                       << " is not in correct type, expect string";
+    }
+    return value.asString();
+}
+
+Result<std::string> JsonValueParser::parseStringValue(const std::string& fieldName,
+                                                      const Json::Value& value) const {
+    return convertValueToType<std::string>(fieldName, value);
+}
+
+template <class T>
+Result<T> JsonValueParser::parseValue(const std::string& fieldName,
+                                      const Json::Value& value) const {
+    if (!value.isString()) {
+        return convertValueToType<T>(fieldName, value);
+    }
+    auto maybeTypeAndValue = maybeGetTypeAndValueName(value.asString());
+    if (!maybeTypeAndValue.has_value()) {
+        return Error() << "Invalid constant value: " << value << " for field: " << fieldName;
+    }
+    auto constantParseResult = parseConstantValue(maybeTypeAndValue.value());
+    if (!constantParseResult.ok()) {
+        return constantParseResult.error();
+    }
+    int constantValue = constantParseResult.value();
+    return static_cast<T>(constantValue);
+}
+
+template <>
+Result<std::string> JsonValueParser::parseValue<std::string>(const std::string& fieldName,
+                                                             const Json::Value& value) const {
+    return parseStringValue(fieldName, value);
+}
+
+template <class T>
+Result<std::vector<T>> JsonValueParser::parseArray(const std::string& fieldName,
+                                                   const Json::Value& value) const {
+    if (!value.isArray()) {
+        return Error() << "The value: " << value << " for field: " << fieldName
+                       << " is not in correct type, expect array";
+    }
+    std::vector<T> parsedValues;
+    for (unsigned int i = 0; i < value.size(); i++) {
+        auto result = parseValue<T>(fieldName, value[i]);
+        if (!result.ok()) {
+            return result.error();
+        }
+        parsedValues.push_back(result.value());
+    }
+    return std::move(parsedValues);
+}
+
+std::optional<std::pair<std::string, std::string>> JsonValueParser::maybeGetTypeAndValueName(
+        const std::string& jsonFieldValue) const {
+    size_t pos = jsonFieldValue.find(DELIMITER);
+    if (pos == std::string::npos) {
+        return {};
+    }
+    std::string type = jsonFieldValue.substr(0, pos);
+    std::string valueName = jsonFieldValue.substr(pos + DELIMITER.length(), std::string::npos);
+    if (type != "Constants" && mConstantParsersByType.find(type) == mConstantParsersByType.end()) {
+        return {};
+    }
+    return std::make_pair(type, valueName);
+}
+
+Result<int> JsonValueParser::parseConstantValue(
+        const std::pair<std::string, std::string>& typeValueName) const {
+    const std::string& type = typeValueName.first;
+    const std::string& valueName = typeValueName.second;
+    auto it = mConstantParsersByType.find(type);
+    if (it == mConstantParsersByType.end()) {
+        return Error() << "Unrecognized type: " << type;
+    }
+    auto result = it->second->parseValue(valueName);
+    if (!result.ok()) {
+        return Error() << type << "::" << valueName << " undefined";
+    }
+    return result;
+}
+
+template <class T>
+bool JsonConfigParser::tryParseJsonValueToVariable(const Json::Value& parentJsonNode,
+                                                   const std::string& fieldName,
+                                                   bool fieldIsOptional, T* outPtr,
+                                                   std::vector<std::string>* errors) {
+    if (!parentJsonNode.isObject()) {
+        errors->push_back("Node: " + parentJsonNode.toStyledString() + " is not an object");
+        return false;
+    }
+    if (!parentJsonNode.isMember(fieldName)) {
+        if (!fieldIsOptional) {
+            errors->push_back("Missing required field: " + fieldName +
+                              " in node: " + parentJsonNode.toStyledString());
+            return false;
+        }
+        return true;
+    }
+    auto result = mValueParser.parseValue<T>(fieldName, parentJsonNode[fieldName]);
+    if (!result.ok()) {
+        errors->push_back(result.error().message());
+        return false;
+    }
+    *outPtr = std::move(result.value());
+    return true;
+}
+
+template <class T>
+bool JsonConfigParser::tryParseJsonArrayToVariable(const Json::Value& parentJsonNode,
+                                                   const std::string& fieldName,
+                                                   bool fieldIsOptional, std::vector<T>* outPtr,
+                                                   std::vector<std::string>* errors) {
+    if (!parentJsonNode.isObject()) {
+        errors->push_back("Node: " + parentJsonNode.toStyledString() + " is not an object");
+        return false;
+    }
+    if (!parentJsonNode.isMember(fieldName)) {
+        if (!fieldIsOptional) {
+            errors->push_back("Missing required field: " + fieldName +
+                              " in node: " + parentJsonNode.toStyledString());
+            return false;
+        }
+        return true;
+    }
+    auto result = mValueParser.parseArray<T>(fieldName, parentJsonNode[fieldName]);
+    if (!result.ok()) {
+        errors->push_back(result.error().message());
+        return false;
+    }
+    *outPtr = std::move(result.value());
+    return true;
+}
+
+template <class T>
+void JsonConfigParser::parseAccessChangeMode(
+        const Json::Value& parentJsonNode, const std::string& fieldName, int propId,
+        const std::string& propStr, const std::unordered_map<VehicleProperty, T>& defaultMap,
+        T* outPtr, std::vector<std::string>* errors) {
+    if (!parentJsonNode.isObject()) {
+        errors->push_back("Node: " + parentJsonNode.toStyledString() + " is not an object");
+        return;
+    }
+    if (parentJsonNode.isMember(fieldName)) {
+        auto result = mValueParser.parseValue<int32_t>(fieldName, parentJsonNode[fieldName]);
+        if (!result.ok()) {
+            errors->push_back(result.error().message());
+            return;
+        }
+        *outPtr = static_cast<T>(result.value());
+        return;
+    }
+    auto it = defaultMap.find(static_cast<VehicleProperty>(propId));
+    if (it == defaultMap.end()) {
+        errors->push_back("No " + fieldName + " specified for property: " + propStr);
+        return;
+    }
+    *outPtr = it->second;
+    return;
+}
+
+bool JsonConfigParser::parsePropValues(const Json::Value& parentJsonNode,
+                                       const std::string& fieldName, RawPropValues* outPtr,
+                                       std::vector<std::string>* errors) {
+    if (!parentJsonNode.isObject()) {
+        errors->push_back("Node: " + parentJsonNode.toStyledString() + " is not an object");
+        return false;
+    }
+    if (!parentJsonNode.isMember(fieldName)) {
+        return false;
+    }
+    const Json::Value& jsonValue = parentJsonNode[fieldName];
+    bool success = true;
+    success &= tryParseJsonArrayToVariable(jsonValue, "int32Values",
+                                           /*optional=*/true, &(outPtr->int32Values), errors);
+    success &= tryParseJsonArrayToVariable(jsonValue, "floatValues",
+                                           /*optional=*/true, &(outPtr->floatValues), errors);
+    success &= tryParseJsonArrayToVariable(jsonValue, "int64Values",
+                                           /*optional=*/true, &(outPtr->int64Values), errors);
+    // We don't support "byteValues" yet.
+    success &= tryParseJsonValueToVariable(jsonValue, "stringValue",
+                                           /*optional=*/true, &(outPtr->stringValue), errors);
+    return success;
+}
+
+void JsonConfigParser::parseAreas(const Json::Value& parentJsonNode, const std::string& fieldName,
+                                  ConfigDeclaration* config, std::vector<std::string>* errors) {
+    if (!parentJsonNode.isObject()) {
+        errors->push_back("Node: " + parentJsonNode.toStyledString() + " is not an object");
+        return;
+    }
+    if (!parentJsonNode.isMember(fieldName)) {
+        return;
+    }
+    const Json::Value& jsonValue = parentJsonNode[fieldName];
+
+    if (!jsonValue.isArray()) {
+        errors->push_back("Field: " + fieldName + " is not an array");
+        return;
+    }
+    for (unsigned int i = 0; i < jsonValue.size(); i++) {
+        int32_t areaId;
+        const Json::Value& jsonAreaConfig = jsonValue[i];
+        if (!tryParseJsonValueToVariable(jsonAreaConfig, "areaId",
+                                         /*optional=*/false, &areaId, errors)) {
+            continue;
+        }
+        VehicleAreaConfig areaConfig = {};
+        areaConfig.areaId = areaId;
+        tryParseJsonValueToVariable(jsonAreaConfig, "minInt32Value", /*optional=*/true,
+                                    &areaConfig.minInt32Value, errors);
+        tryParseJsonValueToVariable(jsonAreaConfig, "maxInt32Value", /*optional=*/true,
+                                    &areaConfig.maxInt32Value, errors);
+        tryParseJsonValueToVariable(jsonAreaConfig, "minInt64Value", /*optional=*/true,
+                                    &areaConfig.minInt64Value, errors);
+        tryParseJsonValueToVariable(jsonAreaConfig, "maxInt64Value", /*optional=*/true,
+                                    &areaConfig.maxInt64Value, errors);
+        tryParseJsonValueToVariable(jsonAreaConfig, "minFloatValue", /*optional=*/true,
+                                    &areaConfig.minFloatValue, errors);
+        tryParseJsonValueToVariable(jsonAreaConfig, "maxFloatValue", /*optional=*/true,
+                                    &areaConfig.maxFloatValue, errors);
+        config->config.areaConfigs.push_back(std::move(areaConfig));
+
+        RawPropValues areaValue = {};
+        if (parsePropValues(jsonAreaConfig, "defaultValue", &areaValue, errors)) {
+            config->initialAreaValues[areaId] = std::move(areaValue);
+        }
+    }
+}
+
+std::optional<ConfigDeclaration> JsonConfigParser::parseEachProperty(
+        const Json::Value& propJsonValue, std::vector<std::string>* errors) {
+    size_t initialErrorCount = errors->size();
+    ConfigDeclaration configDecl = {};
+    int32_t propId;
+
+    if (!tryParseJsonValueToVariable(propJsonValue, "property", /*optional=*/false, &propId,
+                                     errors)) {
+        return std::nullopt;
+    }
+
+    configDecl.config.prop = propId;
+    std::string propStr = propJsonValue["property"].toStyledString();
+
+    parseAccessChangeMode(propJsonValue, "access", propId, propStr, AccessForVehicleProperty,
+                          &configDecl.config.access, errors);
+
+    parseAccessChangeMode(propJsonValue, "changeMode", propId, propStr,
+                          ChangeModeForVehicleProperty, &configDecl.config.changeMode, errors);
+
+    tryParseJsonValueToVariable(propJsonValue, "configString", /*optional=*/true,
+                                &configDecl.config.configString, errors);
+
+    tryParseJsonArrayToVariable(propJsonValue, "configArray", /*optional=*/true,
+                                &configDecl.config.configArray, errors);
+
+    parsePropValues(propJsonValue, "defaultValue", &configDecl.initialValue, errors);
+
+    tryParseJsonValueToVariable(propJsonValue, "minSampleRate", /*optional=*/true,
+                                &configDecl.config.minSampleRate, errors);
+
+    tryParseJsonValueToVariable(propJsonValue, "maxSampleRate", /*optional=*/true,
+                                &configDecl.config.maxSampleRate, errors);
+
+    parseAreas(propJsonValue, "areas", &configDecl, errors);
+
+    if (errors->size() != initialErrorCount) {
+        return std::nullopt;
+    }
+    return configDecl;
+}
+
+Result<std::vector<ConfigDeclaration>> JsonConfigParser::parseJsonConfig(std::istream& is) {
+    Json::CharReaderBuilder builder;
+    Json::Value root;
+    std::vector<ConfigDeclaration> configs;
+    std::string errs;
+    if (!Json::parseFromStream(builder, is, &root, &errs)) {
+        return Error() << "Failed to parse property config file as JSON, error: " << errs;
+    }
+    Json::Value properties = root["properties"];
+    std::vector<std::string> errors;
+    for (unsigned int i = 0; i < properties.size(); i++) {
+        if (auto maybeConfig = parseEachProperty(properties[i], &errors); maybeConfig.has_value()) {
+            configs.push_back(std::move(maybeConfig.value()));
+        }
+    }
+    if (!errors.empty()) {
+        return Error() << android::base::Join(errors, '\n');
+    }
+    return configs;
+}
+
+}  // namespace jsonconfigloader_impl
+
+JsonConfigLoader::JsonConfigLoader() {
+    mParser = std::make_unique<jsonconfigloader_impl::JsonConfigParser>();
+}
+
+android::base::Result<std::vector<ConfigDeclaration>> JsonConfigLoader::loadPropConfig(
+        std::istream& is) {
+    return mParser->parseJsonConfig(is);
+}
+
+}  // namespace vehicle
+}  // namespace automotive
+}  // namespace hardware
+}  // namespace android
diff --git a/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/test/Android.bp b/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/test/Android.bp
new file mode 100644
index 0000000..dae37b9
--- /dev/null
+++ b/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/test/Android.bp
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+cc_test {
+    name: "JsonConfigLoaderUnitTest",
+    vendor: true,
+    srcs: ["*.cpp"],
+    static_libs: [
+        "VehicleHalJsonConfigLoader",
+        "VehicleHalUtils",
+        "libgtest",
+    ],
+    shared_libs: [
+        "libjsoncpp",
+    ],
+    defaults: ["VehicleHalDefaults"],
+    test_suites: ["device-tests"],
+}
+
+cc_test {
+    name: "JsonConfigLoaderUnitTestEnableTestProperties",
+    vendor: true,
+    srcs: ["*.cpp"],
+    static_libs: [
+        "VehicleHalJsonConfigLoaderEnableTestProperties",
+        "VehicleHalUtils",
+        "libgtest",
+    ],
+    shared_libs: [
+        "libjsoncpp",
+    ],
+    defaults: ["VehicleHalDefaults"],
+    test_suites: ["device-tests"],
+}
diff --git a/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/test/JsonConfigLoaderUnitTest.cpp b/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/test/JsonConfigLoaderUnitTest.cpp
new file mode 100644
index 0000000..cff70d9
--- /dev/null
+++ b/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/test/JsonConfigLoaderUnitTest.cpp
@@ -0,0 +1,592 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <JsonConfigLoader.h>
+
+#include <PropertyUtils.h>
+
+#include <gtest/gtest.h>
+#include <sstream>
+
+namespace android {
+namespace hardware {
+namespace automotive {
+namespace vehicle {
+
+using ::aidl::android::hardware::automotive::vehicle::RawPropValues;
+using ::aidl::android::hardware::automotive::vehicle::VehicleAreaConfig;
+using ::aidl::android::hardware::automotive::vehicle::VehiclePropConfig;
+using ::aidl::android::hardware::automotive::vehicle::VehicleProperty;
+using ::aidl::android::hardware::automotive::vehicle::VehiclePropertyAccess;
+using ::aidl::android::hardware::automotive::vehicle::VehiclePropertyChangeMode;
+
+class JsonConfigLoaderUnitTest : public ::testing::Test {
+  protected:
+    JsonConfigLoader mLoader;
+};
+
+TEST_F(JsonConfigLoaderUnitTest, TestBasic) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": 291504388
+        }]
+    }
+    )");
+
+    auto result = mLoader.loadPropConfig(iss);
+
+    ASSERT_TRUE(result.ok()) << result.error().message();
+
+    auto configs = result.value();
+    ASSERT_EQ(configs.size(), 1u);
+
+    ASSERT_EQ(configs[0].config.prop, 291504388);
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestPropertyIsEnum) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY"
+        }]
+    }
+    )");
+
+    auto result = mLoader.loadPropConfig(iss);
+
+    ASSERT_TRUE(result.ok()) << result.error().message();
+
+    auto configs = result.value();
+    ASSERT_EQ(configs.size(), 1u);
+
+    ASSERT_EQ(configs[0].config.prop, toInt(VehicleProperty::INFO_FUEL_CAPACITY));
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestPropertyEnum_FailInvalidEnum) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::BLAH"
+        }]
+    }
+    )");
+
+    ASSERT_FALSE(mLoader.loadPropConfig(iss).ok())
+            << "Invalid VehicleProperty enum must cause error";
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestPropertyEnum_FailInvalidType) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "test"
+        }]
+    }
+    )");
+
+    ASSERT_FALSE(mLoader.loadPropConfig(iss).ok())
+            << "Invalid VehicleProperty type must cause error";
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestProperty_FailInvalidJson) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+    }
+    )");
+
+    ASSERT_FALSE(mLoader.loadPropConfig(iss).ok()) << "Invalid JSON format must cause error";
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestConfigArray) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "configArray": [1, 2, 3]
+        }]
+    }
+    )");
+
+    auto result = mLoader.loadPropConfig(iss);
+
+    ASSERT_TRUE(result.ok()) << result.error().message();
+
+    auto configs = result.value();
+    ASSERT_EQ(configs.size(), 1u);
+    ASSERT_EQ(configs[0].config.configArray, std::vector<int>({1, 2, 3}));
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestConfigArrayConstants) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "configArray": [1, 2, "Constants::FUEL_DOOR_REAR_LEFT"]
+        }]
+    }
+    )");
+
+    auto result = mLoader.loadPropConfig(iss);
+
+    ASSERT_TRUE(result.ok()) << result.error().message();
+
+    auto configs = result.value();
+    ASSERT_EQ(configs.size(), 1u);
+    ASSERT_EQ(configs[0].config.configArray, std::vector<int>({1, 2, FUEL_DOOR_REAR_LEFT}));
+}
+
+// We have special logic to deal with GALLON and US_GALLON since they share the same value.
+TEST_F(JsonConfigLoaderUnitTest, TestConfigArrayUnitGallon) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "configArray": [1, 2, "VehicleUnit::GALLON"]
+        }]
+    }
+    )");
+
+    auto result = mLoader.loadPropConfig(iss);
+
+    ASSERT_TRUE(result.ok()) << result.error().message();
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestConfigArrayUnitUsGallon) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "configArray": [1, 2, "VehicleUnit::US_GALLON"]
+        }]
+    }
+    )");
+
+    auto result = mLoader.loadPropConfig(iss);
+
+    ASSERT_TRUE(result.ok()) << result.error().message();
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestConfigArray_FailInvalidEnum) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "configArray": [1, 2, "VehicleUnits::BLAH"]
+        }]
+    }
+    )");
+
+    ASSERT_FALSE(mLoader.loadPropConfig(iss).ok())
+            << "Invalid enum in ConfigArray must cause error";
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestConfigArray_FailNotArray) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "configArray": "123"
+        }]
+    }
+    )");
+
+    ASSERT_FALSE(mLoader.loadPropConfig(iss).ok())
+            << "ConfigArray is not an array must cause error";
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestConfigString) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "configString": "test"
+        }]
+    }
+    )");
+
+    auto result = mLoader.loadPropConfig(iss);
+
+    ASSERT_TRUE(result.ok()) << result.error().message();
+
+    auto configs = result.value();
+    ASSERT_EQ(configs.size(), 1u);
+    ASSERT_EQ(configs[0].config.configString, "test");
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestConfigString_FailNotString) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "configString": 1234
+        }]
+    }
+    )");
+
+    ASSERT_FALSE(mLoader.loadPropConfig(iss).ok())
+            << "ConfigString is not a String must cause error";
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestCheckDefaultAccessChangeMode) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY"
+        }]
+    }
+    )");
+
+    auto result = mLoader.loadPropConfig(iss);
+
+    ASSERT_TRUE(result.ok()) << result.error().message();
+    auto configs = result.value();
+    ASSERT_EQ(configs.size(), 1u);
+
+    const VehiclePropConfig& propConfig = configs[0].config;
+    ASSERT_EQ(propConfig.access, VehiclePropertyAccess::READ);
+    ASSERT_EQ(propConfig.changeMode, VehiclePropertyChangeMode::STATIC);
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestAccessOverride) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "access": "VehiclePropertyAccess::WRITE"
+        }]
+    }
+    )");
+
+    auto result = mLoader.loadPropConfig(iss);
+
+    ASSERT_TRUE(result.ok()) << result.error().message();
+    auto configs = result.value();
+    ASSERT_EQ(configs.size(), 1u);
+
+    const VehiclePropConfig& propConfig = configs[0].config;
+    ASSERT_EQ(propConfig.access, VehiclePropertyAccess::WRITE);
+    ASSERT_EQ(propConfig.changeMode, VehiclePropertyChangeMode::STATIC);
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestChangeModeOverride) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "changeMode": "VehiclePropertyChangeMode::ON_CHANGE"
+        }]
+    }
+    )");
+
+    auto result = mLoader.loadPropConfig(iss);
+
+    ASSERT_TRUE(result.ok()) << result.error().message();
+    auto configs = result.value();
+    ASSERT_EQ(configs.size(), 1u);
+
+    const VehiclePropConfig& propConfig = configs[0].config;
+    ASSERT_EQ(propConfig.access, VehiclePropertyAccess::READ);
+    ASSERT_EQ(propConfig.changeMode, VehiclePropertyChangeMode::ON_CHANGE);
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestCustomProp) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": 1234,
+            "access": "VehiclePropertyAccess::WRITE",
+            "changeMode": "VehiclePropertyChangeMode::ON_CHANGE"
+        }]
+    }
+    )");
+
+    auto result = mLoader.loadPropConfig(iss);
+
+    ASSERT_TRUE(result.ok()) << result.error().message();
+    auto configs = result.value();
+    ASSERT_EQ(configs.size(), 1u);
+
+    const VehiclePropConfig& propConfig = configs[0].config;
+    ASSERT_EQ(propConfig.access, VehiclePropertyAccess::WRITE);
+    ASSERT_EQ(propConfig.changeMode, VehiclePropertyChangeMode::ON_CHANGE);
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestCustomProp_FailMissingAccess) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": 1234,
+            "changeMode": "VehiclePropertyChangeMode::ON_CHANGE"
+        }]
+    }
+    )");
+
+    ASSERT_FALSE(mLoader.loadPropConfig(iss).ok())
+            << "Missing access for custom property must cause error";
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestCustomProp_FailMissingChangeMode) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": 1234,
+            "access": "VehiclePropertyAccess::WRITE"
+        }]
+    }
+    )");
+
+    ASSERT_FALSE(mLoader.loadPropConfig(iss).ok())
+            << "Missing change mode for custom property must cause error";
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestMinSampleRate) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "minSampleRate": 1,
+        }]
+    }
+    )");
+
+    auto result = mLoader.loadPropConfig(iss);
+
+    ASSERT_TRUE(result.ok()) << result.error().message();
+
+    auto configs = result.value();
+    ASSERT_EQ(configs.size(), 1u);
+    ASSERT_EQ(configs[0].config.minSampleRate, 1);
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestMinSampleRate_FailInvalidType) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "minSampleRate": "abcd",
+        }]
+    }
+    )");
+
+    ASSERT_FALSE(mLoader.loadPropConfig(iss).ok())
+            << "Wrong type for MinSampleRate must cause error";
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestMaxSampleRate) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "maxSampleRate": 1,
+        }]
+    }
+    )");
+
+    auto result = mLoader.loadPropConfig(iss);
+
+    ASSERT_TRUE(result.ok()) << result.error().message();
+
+    auto configs = result.value();
+    ASSERT_EQ(configs.size(), 1u);
+    ASSERT_EQ(configs[0].config.maxSampleRate, 1);
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestMaxSampleRate_FailInvalidType) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "maxSampleRate": "abcd",
+        }]
+    }
+    )");
+
+    ASSERT_FALSE(mLoader.loadPropConfig(iss).ok())
+            << "Wrong type for MaxSampleRate must cause error";
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestDefaultValue_Simple) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "defaultValue": {
+                "int32Values": [1, 2]
+            }
+        }]
+    }
+    )");
+
+    auto result = mLoader.loadPropConfig(iss);
+
+    ASSERT_TRUE(result.ok()) << result.error().message();
+
+    auto configs = result.value();
+    ASSERT_EQ(configs.size(), 1u);
+    ASSERT_EQ(configs[0].initialValue.int32Values, std::vector<int32_t>({1, 2}));
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestDefaultValue_Mixed) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "defaultValue": {
+                "int32Values": [1, "Constants::FUEL_DOOR_REAR_LEFT"],
+                "int64Values": [2, "Constants::FUEL_DOOR_REAR_LEFT"],
+                "floatValues": [3.0, "Constants::FUEL_DOOR_REAR_LEFT"],
+                "stringValue": "abcd"
+            }
+        }]
+    }
+    )");
+
+    auto result = mLoader.loadPropConfig(iss);
+
+    ASSERT_TRUE(result.ok()) << result.error().message();
+
+    auto configs = result.value();
+    ASSERT_EQ(configs.size(), 1u);
+
+    const RawPropValues& initialValue = configs[0].initialValue;
+    ASSERT_EQ(initialValue.int32Values, std::vector<int32_t>({1, FUEL_DOOR_REAR_LEFT}));
+    ASSERT_EQ(initialValue.int64Values,
+              std::vector<int64_t>({2, static_cast<int64_t>(FUEL_DOOR_REAR_LEFT)}));
+    ASSERT_EQ(initialValue.floatValues,
+              std::vector<float>({3.0, static_cast<float>(FUEL_DOOR_REAR_LEFT)}));
+    ASSERT_EQ(initialValue.stringValue, "abcd");
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestDefaultValue_FailNotObject) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "defaultValue": []
+        }]
+    }
+    )");
+
+    ASSERT_FALSE(mLoader.loadPropConfig(iss).ok())
+            << "DefaultValue is not an object must cause error";
+}
+
+TEST_F(JsonConfigLoaderUnitTest, TestDefaultValue_FailInvalidType) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "defaultValue": {
+                "int32Values": [1.1]
+            }
+        }]
+    }
+    )");
+
+    ASSERT_FALSE(mLoader.loadPropConfig(iss).ok())
+            << "Wrong type for DefaultValue must cause error";
+}
+
+TEST_F(JsonConfigLoaderUnitTest, testAreas_Simple) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "areas": [{
+                "areaId": "Constants::HVAC_ALL",
+                "minInt32Value": 1,
+                "maxInt32Value": 7
+            }]
+        }]
+    }
+    )");
+
+    auto result = mLoader.loadPropConfig(iss);
+
+    auto configs = result.value();
+    ASSERT_EQ(configs.size(), 1u);
+
+    const VehiclePropConfig& config = configs[0].config;
+    ASSERT_EQ(config.areaConfigs.size(), 1u);
+    const VehicleAreaConfig& areaConfig = config.areaConfigs[0];
+    ASSERT_EQ(areaConfig.minInt32Value, 1);
+    ASSERT_EQ(areaConfig.maxInt32Value, 7);
+    ASSERT_EQ(areaConfig.areaId, HVAC_ALL);
+}
+
+TEST_F(JsonConfigLoaderUnitTest, testAreas_DefaultValueForEachArea) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "areas": [{
+                "areaId": "Constants::HVAC_LEFT",
+                "defaultValue": {
+                    "int32Values": [1]
+                }
+            }, {
+                "areaId": "Constants::HVAC_RIGHT",
+                "defaultValue": {
+                    "int32Values": [2]
+                }
+            }]
+        }]
+    }
+    )");
+
+    auto result = mLoader.loadPropConfig(iss);
+
+    auto configs = result.value();
+    ASSERT_EQ(configs.size(), 1u);
+
+    const VehiclePropConfig& config = configs[0].config;
+    ASSERT_EQ(config.areaConfigs.size(), 2u);
+    ASSERT_EQ(config.areaConfigs[0].areaId, HVAC_LEFT);
+    ASSERT_EQ(config.areaConfigs[1].areaId, HVAC_RIGHT);
+    ASSERT_EQ(configs[0].initialAreaValues[HVAC_LEFT], RawPropValues{.int32Values = {1}});
+    ASSERT_EQ(configs[0].initialAreaValues[HVAC_RIGHT], RawPropValues{.int32Values = {2}});
+}
+
+TEST_F(JsonConfigLoaderUnitTest, testAreas_FailInvalidTypeForOneAreaValue) {
+    std::istringstream iss(R"(
+    {
+        "properties": [{
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            "areas": [{
+                "areaId": "Constants::HVAC_LEFT",
+                "defaultValue": {
+                    "int32Values": [1]
+                }
+            }, {
+                "areaId": "Constants::HVAC_RIGHT",
+                "defaultValue": {
+                    "int32Values": [2.1]
+                }
+            }]
+        }]
+    }
+    )");
+
+    ASSERT_FALSE(mLoader.loadPropConfig(iss).ok())
+            << "Wrong type for DefaultValue for one area must cause error";
+}
+
+}  // namespace vehicle
+}  // namespace automotive
+}  // namespace hardware
+}  // namespace android
diff --git a/automotive/vehicle/aidl/impl/default_config/config/DefaultProperties.json b/automotive/vehicle/aidl/impl/default_config/config/DefaultProperties.json
index f2415aa..f4ce402 100644
--- a/automotive/vehicle/aidl/impl/default_config/config/DefaultProperties.json
+++ b/automotive/vehicle/aidl/impl/default_config/config/DefaultProperties.json
@@ -130,6 +130,311 @@
             ]
         },
         {
+            "property": "VehicleProperty::SEAT_BELT_BUCKLED",
+            "defaultValue": {
+                "int32Values": [
+                    0
+                ]
+            },
+            "areas": [
+                {
+                    "areaId": "Constants::SEAT_1_LEFT"
+                },
+                {
+                    "areaId": "Constants::SEAT_1_RIGHT"
+                },
+                {
+                    "areaId": "Constants::SEAT_2_LEFT"
+                },
+                {
+                    "areaId": "Constants::SEAT_2_RIGHT"
+                },
+                {
+                    "areaId": "Constants::SEAT_2_CENTER"
+                }
+            ]
+        },
+        {
+            "property": "VehicleProperty::SEAT_BELT_HEIGHT_POS",
+            "defaultValue": {
+                "int32Values": [
+                    10
+                ]
+            },
+            "areas": [
+                {
+                    "areaId": "Constants::SEAT_1_LEFT",
+                    "minInt32Value": 0,
+                    "maxInt32Value": 10
+                },
+                {
+                    "areaId": "Constants::SEAT_1_RIGHT",
+                    "minInt32Value": 0,
+                    "maxInt32Value": 10
+                },
+                {
+                    "areaId": "Constants::SEAT_2_LEFT",
+                    "minInt32Value": 0,
+                    "maxInt32Value": 10
+                },
+                {
+                    "areaId": "Constants::SEAT_2_RIGHT",
+                    "minInt32Value": 0,
+                    "maxInt32Value": 10
+                },
+                {
+                    "areaId": "Constants::SEAT_2_CENTER",
+                    "minInt32Value": 0,
+                    "maxInt32Value": 10
+                }
+            ]
+        },
+        {
+            "property": "VehicleProperty::SEAT_BELT_HEIGHT_MOVE",
+            "defaultValue": {
+                "int32Values": [
+                    0
+                ]
+            },
+            "areas": [
+                {
+                    "areaId": "Constants::SEAT_1_LEFT",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                },
+                {
+                    "areaId": "Constants::SEAT_1_RIGHT",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                },
+                {
+                    "areaId": "Constants::SEAT_2_LEFT",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                },
+                {
+                    "areaId": "Constants::SEAT_2_RIGHT",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                },
+                {
+                    "areaId": "Constants::SEAT_2_CENTER",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                }
+            ]
+        },
+        {
+            "property": "VehicleProperty::SEAT_FORE_AFT_POS",
+            "defaultValue": {
+                "int32Values": [
+                    0
+                ]
+            },
+            "areas": [
+                {
+                    "areaId": "Constants::SEAT_1_LEFT",
+                    "minInt32Value": -10,
+                    "maxInt32Value": 10
+                },
+                {
+                    "areaId": "Constants::SEAT_1_RIGHT",
+                    "minInt32Value": -10,
+                    "maxInt32Value": 10
+                },
+                {
+                    "areaId": "Constants::SEAT_2_LEFT",
+                    "minInt32Value": -10,
+                    "maxInt32Value": 10
+                },
+                {
+                    "areaId": "Constants::SEAT_2_RIGHT",
+                    "minInt32Value": -10,
+                    "maxInt32Value": 10
+                },
+                {
+                    "areaId": "Constants::SEAT_2_CENTER",
+                    "minInt32Value": -10,
+                    "maxInt32Value": 10
+                }
+            ]
+        },
+        {
+            "property": "VehicleProperty::SEAT_FORE_AFT_MOVE",
+            "defaultValue": {
+                "int32Values": [
+                    0
+                ]
+            },
+            "areas": [
+                {
+                    "areaId": "Constants::SEAT_1_LEFT",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                },
+                {
+                    "areaId": "Constants::SEAT_1_RIGHT",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                },
+                {
+                    "areaId": "Constants::SEAT_2_LEFT",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                },
+                {
+                    "areaId": "Constants::SEAT_2_RIGHT",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                },
+                {
+                    "areaId": "Constants::SEAT_2_CENTER",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                }
+            ]
+        },
+        {
+            "property": "VehicleProperty::SEAT_BACKREST_ANGLE_1_POS",
+            "defaultValue": {
+                "int32Values": [
+                    0
+                ]
+            },
+            "areas": [
+                {
+                    "areaId": "Constants::SEAT_1_LEFT",
+                    "minInt32Value": -10,
+                    "maxInt32Value": 10
+                },
+                {
+                    "areaId": "Constants::SEAT_1_RIGHT",
+                    "minInt32Value": -10,
+                    "maxInt32Value": 10
+                },
+                {
+                    "areaId": "Constants::SEAT_2_LEFT",
+                    "minInt32Value": -10,
+                    "maxInt32Value": 10
+                },
+                {
+                    "areaId": "Constants::SEAT_2_RIGHT",
+                    "minInt32Value": -10,
+                    "maxInt32Value": 10
+                },
+                {
+                    "areaId": "Constants::SEAT_2_CENTER",
+                    "minInt32Value": -10,
+                    "maxInt32Value": 10
+                }
+            ]
+        },
+        {
+            "property": "VehicleProperty::SEAT_BACKREST_ANGLE_1_MOVE",
+            "defaultValue": {
+                "int32Values": [
+                    0
+                ]
+            },
+            "areas": [
+                {
+                    "areaId": "Constants::SEAT_1_LEFT",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                },
+                {
+                    "areaId": "Constants::SEAT_1_RIGHT",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                },
+                {
+                    "areaId": "Constants::SEAT_2_LEFT",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                },
+                {
+                    "areaId": "Constants::SEAT_2_RIGHT",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                },
+                {
+                    "areaId": "Constants::SEAT_2_CENTER",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                }
+            ]
+        },
+        {
+            "property": "VehicleProperty::SEAT_BACKREST_ANGLE_2_POS",
+            "defaultValue": {
+                "int32Values": [
+                    0
+                ]
+            },
+            "areas": [
+                {
+                    "areaId": "Constants::SEAT_1_LEFT",
+                    "minInt32Value": -10,
+                    "maxInt32Value": 10
+                },
+                {
+                    "areaId": "Constants::SEAT_1_RIGHT",
+                    "minInt32Value": -10,
+                    "maxInt32Value": 10
+                },
+                {
+                    "areaId": "Constants::SEAT_2_LEFT",
+                    "minInt32Value": -10,
+                    "maxInt32Value": 10
+                },
+                {
+                    "areaId": "Constants::SEAT_2_RIGHT",
+                    "minInt32Value": -10,
+                    "maxInt32Value": 10
+                },
+                {
+                    "areaId": "Constants::SEAT_2_CENTER",
+                    "minInt32Value": -10,
+                    "maxInt32Value": 10
+                }
+            ]
+        },
+        {
+            "property": "VehicleProperty::SEAT_BACKREST_ANGLE_2_MOVE",
+            "defaultValue": {
+                "int32Values": [
+                    0
+                ]
+            },
+            "areas": [
+                {
+                    "areaId": "Constants::SEAT_1_LEFT",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                },
+                {
+                    "areaId": "Constants::SEAT_1_RIGHT",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                },
+                {
+                    "areaId": "Constants::SEAT_2_LEFT",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                },
+                {
+                    "areaId": "Constants::SEAT_2_RIGHT",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                },
+                {
+                    "areaId": "Constants::SEAT_2_CENTER",
+                    "minInt32Value": -1,
+                    "maxInt32Value": 1
+                }
+            ]
+        },
+        {
             "property": "VehicleProperty::SEAT_OCCUPANCY",
             "areas": [
                 {
@@ -783,6 +1088,21 @@
             "comment": "+ve values for heating and -ve for cooling"
         },
         {
+            "property": "VehicleProperty::HVAC_SIDE_MIRROR_HEAT",
+            "defaultValue": {
+                "int32Values": [
+                    0
+                ]
+            },
+            "areas": [
+                {
+                    "areaId": "Constants::MIRROR_DRIVER_LEFT_RIGHT",
+                    "minInt32Value": 0,
+                    "maxInt32Value": 2
+                }
+            ]
+        },
+        {
             "property": "VehicleProperty::HVAC_TEMPERATURE_SET",
             "areas": [
                 {
@@ -1346,4 +1666,4 @@
             }
         }
     ]
-}
\ No newline at end of file
+}
diff --git a/automotive/vehicle/aidl/impl/default_config/config/README.md b/automotive/vehicle/aidl/impl/default_config/config/README.md
new file mode 100644
index 0000000..0e3fc5e
--- /dev/null
+++ b/automotive/vehicle/aidl/impl/default_config/config/README.md
@@ -0,0 +1,151 @@
+# Property Configuration Files
+
+Each JSON file in this folder is a property configuration file for reference
+Vehicle HAL. They contain VehiclePropConfig information along with initial
+value information.
+
+## JSON schema
+
+Each JSON file must be in a schema like the following example:
+(The comment starting with "//" is for documentation only and must be removed
+from the actual JSON file. The "comment" field is used for comment in the
+actual JSON file and will be ignored by the parser)
+
+```
+{
+    // (number) The version for the JSON schema.
+    "apiVersion": 1,
+    // (non-empty array of objects) The property configuration list.
+    //
+    // Each object is a configuration for one property.
+    "properties": [
+        {
+            // (number/string) The ID for the property.
+            // This value is defined in a string value
+            // which represents a constant value, see the "JSON Number-type
+            // Field Values" section for detail.
+            "property": "VehicleProperty::INFO_FUEL_CAPACITY",
+            // (optional, number/string) The access mode for the property.
+            // If specified, this overwrite the default access mode specified in
+            // VehicleProperty.aidl. Must be specified for vendor properties.
+            "access": "VehiclePropertyAccess::READ",
+            // (optional, number/string) The change mode for the property.
+            // If specified, this overwrite the default change mode specified in
+            // VehicleProperty.aidl. Must be specified for vendor properties.
+            "changeMode": "VehiclePropertyChangeMode::STATIC",
+            // (optional, string) The config string.
+            "configString": "blahblah",
+            // (optional, array of number/string) The config array.
+            "configArray": [1, 2, "Constants::HVAC_ALL"],
+            // (optional, object) The default value for the property.
+            // If not specified, the property will be shown as unavailable
+            // until its value is set.
+            "defaultValue": {
+                // (optional, array of int number/string) Int values.
+                "int32Values": [1, 2, "Constants::HVAC_ALL"],
+                // (optional, array of int number/string) Long values.
+                "int64Values": [1, 2],
+                // (optional, array of float number/string) Float values.
+                "floatValues": [1.1, 2.2],
+                // (optional, string) String value.
+                "stringValue": "test"
+            },
+            // (optional, number/string) The minimum sample rate in HZ.
+            // Only work for VehiclePropertyChangeMode::CONTINUOUS property.
+            // Must be specified for continuous property.
+            "minSampleRate": 1,
+            // (optional, number/string) The maximum sample rate in HZ.
+            // Only work for VehiclePropertyChangeMode::CONTINUOUS property.
+            // Must be specified for continuous property.
+            "maxSampleRate": 10,
+            // (optional, array of objects) The area configs.
+            "areas:" [
+                {
+                    // (number/string) The area ID.
+                    "areaId": "Constants::DOOR_1_LEFT",
+                    // (optional number/string) The minimum int value.
+                    "minInt32Value": 1,
+                    // (optional number/string) The maximum int value.
+                    "maxInt32Value": 10,
+                    // (optional number/string) The minimum long value.
+                    "minInt64Value": 1,
+                    // (optional number/string) The maximum long value.
+                    "maxInt64Value": 10,
+                    // (optional number/string) The minimum float value.
+                    "minFloatValue": 1,
+                    // (optional number/string) The maximum float value.
+                    "maxFloatValue": 10,
+                    // (optional object) The default value for this area.
+                    // Uses the same format as the "defaultValue" field for
+                    // property object. If specified, this overwrite the global
+                    // defaultValue.
+                    "defaultValue": {
+                        "int32Values": [1, 2, "Constants::HVAC_ALL"],
+                        "int64Values": [1, 2],
+                        "floatValues": [1.1, 2.2],
+                        "stringValue": "test"
+                    }
+                }
+            ]
+        }
+     ]
+}
+```
+
+## JSON Number-type Field Values
+
+For number type field values, they can either be defined as a numeric number,
+e.g., `{"minInt32Value": 1}` or be defined as a string which represents a
+defined constant value, e.g.,
+`{"property": "VehicleProperty::INFO_FUEL_CAPACITY"}`.
+
+For constant values, they must be a string in the format of `XXX::XXX`, where
+the field before `::` is the constant type, and the field after `::` is the
+variable name.
+
+We support the following constant types:
+
+* VehiclePropertyAccess
+
+* VehiclePropertyChangeMode
+
+* VehicleGear
+
+* VehicleAreaWindow
+
+* VehicleOilLevel
+
+* VehicleUnit
+
+* VehicleSeatOccupancyState
+
+* VehicleHvacFanDirection
+
+* VehicleApPowerStateReport
+
+* VehicleTurnSignal
+
+* VehicleVendorPermission
+
+* EvsServiceType
+
+* EvsServiceState
+
+* EvConnectorType
+
+* VehicleProperty
+
+* GsrComplianceRequirementType
+
+* VehicleIgnitionState
+
+* FuelType
+
+* Constants
+
+Every constant type except "Constants" corresponds to a enum defined in Vehicle
+HAL interfac. E.g. "VehicleProperty" corresponds to the enums defined in
+"VehicleProperty.aidl".
+
+"Constants" type refers to the constant variables defined in the paresr.
+Specifically, the "CONSTANTS_BY_NAME" map defined in "JsonConfigLoader.cpp".
diff --git a/automotive/vehicle/aidl/impl/default_config/include/DefaultConfig.h b/automotive/vehicle/aidl/impl/default_config/include/DefaultConfig.h
index 986d1a6..8c6fa1b 100644
--- a/automotive/vehicle/aidl/impl/default_config/include/DefaultConfig.h
+++ b/automotive/vehicle/aidl/impl/default_config/include/DefaultConfig.h
@@ -17,6 +17,7 @@
 #ifndef android_hardware_automotive_vehicle_aidl_impl_default_config_include_DefaultConfig_H_
 #define android_hardware_automotive_vehicle_aidl_impl_default_config_include_DefaultConfig_H_
 
+#include <ConfigDeclaration.h>
 #include <PropertyUtils.h>
 #include <TestPropertyUtils.h>
 #include <VehicleHalTypes.h>
@@ -56,17 +57,6 @@
 using ::aidl::android::hardware::automotive::vehicle::VehicleUnit;
 using ::aidl::android::hardware::automotive::vehicle::VehicleVendorPermission;
 
-struct ConfigDeclaration {
-    VehiclePropConfig config;
-
-    // This value will be used as an initial value for the property. If this field is specified for
-    // property that supports multiple areas then it will be used for all areas unless particular
-    // area is overridden in initialAreaValue field.
-    RawPropValues initialValue;
-    // Use initialAreaValues if it is necessary to specify different values per each area.
-    std::map<int32_t, RawPropValues> initialAreaValues;
-};
-
 const std::vector<ConfigDeclaration> kVehicleProperties = {
         {.config =
                  {
@@ -192,11 +182,7 @@
                                     VehicleAreaConfig{.areaId = SEAT_2_LEFT},
                                     VehicleAreaConfig{.areaId = SEAT_2_RIGHT},
                                     VehicleAreaConfig{.areaId = SEAT_2_CENTER}}},
-         .initialAreaValues = {{SEAT_1_LEFT, {.int32Values = {0}}},
-                               {SEAT_1_RIGHT, {.int32Values = {0}}},
-                               {SEAT_2_LEFT, {.int32Values = {0}}},
-                               {SEAT_2_RIGHT, {.int32Values = {0}}},
-                               {SEAT_2_CENTER, {.int32Values = {0}}}}},
+         .initialValue = {.int32Values = {0}}},
 
         {.config = {.prop = toInt(VehicleProperty::SEAT_BELT_HEIGHT_POS),
                     .access = VehiclePropertyAccess::READ_WRITE,
@@ -216,11 +202,7 @@
                                     VehicleAreaConfig{.areaId = SEAT_2_CENTER,
                                                       .minInt32Value = 0,
                                                       .maxInt32Value = 10}}},
-         .initialAreaValues = {{SEAT_1_LEFT, {.int32Values = {10}}},
-                               {SEAT_1_RIGHT, {.int32Values = {10}}},
-                               {SEAT_2_LEFT, {.int32Values = {10}}},
-                               {SEAT_2_RIGHT, {.int32Values = {10}}},
-                               {SEAT_2_CENTER, {.int32Values = {10}}}}},
+         .initialValue = {.int32Values = {10}}},
 
         {.config = {.prop = toInt(VehicleProperty::SEAT_BELT_HEIGHT_MOVE),
                     .access = VehiclePropertyAccess::READ_WRITE,
@@ -240,11 +222,127 @@
                                     VehicleAreaConfig{.areaId = SEAT_2_CENTER,
                                                       .minInt32Value = -1,
                                                       .maxInt32Value = 1}}},
-         .initialAreaValues = {{SEAT_1_LEFT, {.int32Values = {0}}},
-                               {SEAT_1_RIGHT, {.int32Values = {0}}},
-                               {SEAT_2_LEFT, {.int32Values = {0}}},
-                               {SEAT_2_RIGHT, {.int32Values = {0}}},
-                               {SEAT_2_CENTER, {.int32Values = {0}}}}},
+         .initialValue = {.int32Values = {0}}},
+
+        {.config = {.prop = toInt(VehicleProperty::SEAT_FORE_AFT_POS),
+                    .access = VehiclePropertyAccess::READ_WRITE,
+                    .changeMode = VehiclePropertyChangeMode::ON_CHANGE,
+                    .areaConfigs = {VehicleAreaConfig{.areaId = SEAT_1_LEFT,
+                                                      .minInt32Value = -10,
+                                                      .maxInt32Value = 10},
+                                    VehicleAreaConfig{.areaId = SEAT_1_RIGHT,
+                                                      .minInt32Value = -10,
+                                                      .maxInt32Value = 10},
+                                    VehicleAreaConfig{.areaId = SEAT_2_LEFT,
+                                                      .minInt32Value = -10,
+                                                      .maxInt32Value = 10},
+                                    VehicleAreaConfig{.areaId = SEAT_2_RIGHT,
+                                                      .minInt32Value = -10,
+                                                      .maxInt32Value = 10},
+                                    VehicleAreaConfig{.areaId = SEAT_2_CENTER,
+                                                      .minInt32Value = -10,
+                                                      .maxInt32Value = 10}}},
+         .initialValue = {.int32Values = {0}}},
+
+        {.config = {.prop = toInt(VehicleProperty::SEAT_FORE_AFT_MOVE),
+                    .access = VehiclePropertyAccess::READ_WRITE,
+                    .changeMode = VehiclePropertyChangeMode::ON_CHANGE,
+                    .areaConfigs = {VehicleAreaConfig{.areaId = SEAT_1_LEFT,
+                                                      .minInt32Value = -1,
+                                                      .maxInt32Value = 1},
+                                    VehicleAreaConfig{.areaId = SEAT_1_RIGHT,
+                                                      .minInt32Value = -1,
+                                                      .maxInt32Value = 1},
+                                    VehicleAreaConfig{.areaId = SEAT_2_LEFT,
+                                                      .minInt32Value = -1,
+                                                      .maxInt32Value = 1},
+                                    VehicleAreaConfig{.areaId = SEAT_2_RIGHT,
+                                                      .minInt32Value = -1,
+                                                      .maxInt32Value = 1},
+                                    VehicleAreaConfig{.areaId = SEAT_2_CENTER,
+                                                      .minInt32Value = -1,
+                                                      .maxInt32Value = 1}}},
+         .initialValue = {.int32Values = {0}}},
+
+        {.config = {.prop = toInt(VehicleProperty::SEAT_BACKREST_ANGLE_1_POS),
+                    .access = VehiclePropertyAccess::READ_WRITE,
+                    .changeMode = VehiclePropertyChangeMode::ON_CHANGE,
+                    .areaConfigs = {VehicleAreaConfig{.areaId = SEAT_1_LEFT,
+                                                      .minInt32Value = -10,
+                                                      .maxInt32Value = 10},
+                                    VehicleAreaConfig{.areaId = SEAT_1_RIGHT,
+                                                      .minInt32Value = -10,
+                                                      .maxInt32Value = 10},
+                                    VehicleAreaConfig{.areaId = SEAT_2_LEFT,
+                                                      .minInt32Value = -10,
+                                                      .maxInt32Value = 10},
+                                    VehicleAreaConfig{.areaId = SEAT_2_RIGHT,
+                                                      .minInt32Value = -10,
+                                                      .maxInt32Value = 10},
+                                    VehicleAreaConfig{.areaId = SEAT_2_CENTER,
+                                                      .minInt32Value = -10,
+                                                      .maxInt32Value = 10}}},
+         .initialValue = {.int32Values = {0}}},
+
+        {.config = {.prop = toInt(VehicleProperty::SEAT_BACKREST_ANGLE_1_MOVE),
+                    .access = VehiclePropertyAccess::READ_WRITE,
+                    .changeMode = VehiclePropertyChangeMode::ON_CHANGE,
+                    .areaConfigs = {VehicleAreaConfig{.areaId = SEAT_1_LEFT,
+                                                      .minInt32Value = -1,
+                                                      .maxInt32Value = 1},
+                                    VehicleAreaConfig{.areaId = SEAT_1_RIGHT,
+                                                      .minInt32Value = -1,
+                                                      .maxInt32Value = 1},
+                                    VehicleAreaConfig{.areaId = SEAT_2_LEFT,
+                                                      .minInt32Value = -1,
+                                                      .maxInt32Value = 1},
+                                    VehicleAreaConfig{.areaId = SEAT_2_RIGHT,
+                                                      .minInt32Value = -1,
+                                                      .maxInt32Value = 1},
+                                    VehicleAreaConfig{.areaId = SEAT_2_CENTER,
+                                                      .minInt32Value = -1,
+                                                      .maxInt32Value = 1}}},
+         .initialValue = {.int32Values = {0}}},
+
+        {.config = {.prop = toInt(VehicleProperty::SEAT_BACKREST_ANGLE_2_POS),
+                    .access = VehiclePropertyAccess::READ_WRITE,
+                    .changeMode = VehiclePropertyChangeMode::ON_CHANGE,
+                    .areaConfigs = {VehicleAreaConfig{.areaId = SEAT_1_LEFT,
+                                                      .minInt32Value = -10,
+                                                      .maxInt32Value = 10},
+                                    VehicleAreaConfig{.areaId = SEAT_1_RIGHT,
+                                                      .minInt32Value = -10,
+                                                      .maxInt32Value = 10},
+                                    VehicleAreaConfig{.areaId = SEAT_2_LEFT,
+                                                      .minInt32Value = -10,
+                                                      .maxInt32Value = 10},
+                                    VehicleAreaConfig{.areaId = SEAT_2_RIGHT,
+                                                      .minInt32Value = -10,
+                                                      .maxInt32Value = 10},
+                                    VehicleAreaConfig{.areaId = SEAT_2_CENTER,
+                                                      .minInt32Value = -10,
+                                                      .maxInt32Value = 10}}},
+         .initialValue = {.int32Values = {0}}},
+
+        {.config = {.prop = toInt(VehicleProperty::SEAT_BACKREST_ANGLE_2_MOVE),
+                    .access = VehiclePropertyAccess::READ_WRITE,
+                    .changeMode = VehiclePropertyChangeMode::ON_CHANGE,
+                    .areaConfigs = {VehicleAreaConfig{.areaId = SEAT_1_LEFT,
+                                                      .minInt32Value = -1,
+                                                      .maxInt32Value = 1},
+                                    VehicleAreaConfig{.areaId = SEAT_1_RIGHT,
+                                                      .minInt32Value = -1,
+                                                      .maxInt32Value = 1},
+                                    VehicleAreaConfig{.areaId = SEAT_2_LEFT,
+                                                      .minInt32Value = -1,
+                                                      .maxInt32Value = 1},
+                                    VehicleAreaConfig{.areaId = SEAT_2_RIGHT,
+                                                      .minInt32Value = -1,
+                                                      .maxInt32Value = 1},
+                                    VehicleAreaConfig{.areaId = SEAT_2_CENTER,
+                                                      .minInt32Value = -1,
+                                                      .maxInt32Value = 1}}},
+         .initialValue = {.int32Values = {0}}},
 
         {.config =
                  {
@@ -1137,7 +1235,7 @@
                  {
                          .prop = toInt(VehicleProperty::SUPPORT_CUSTOMIZE_VENDOR_PERMISSION),
                          .access = VehiclePropertyAccess::READ,
-                         .changeMode = VehiclePropertyChangeMode::ON_CHANGE,
+                         .changeMode = VehiclePropertyChangeMode::STATIC,
                          .configArray = {kMixedTypePropertyForTest,
                                          toInt(VehicleVendorPermission::
                                                        PERMISSION_GET_VENDOR_CATEGORY_INFO),
@@ -1181,8 +1279,8 @@
                 .config =
                         {
                                 .prop = toInt(VehicleProperty::REMOVE_USER),
-                                .access = VehiclePropertyAccess::READ_WRITE,
-                                .changeMode = VehiclePropertyChangeMode::ON_CHANGE,
+                                .access = VehiclePropertyAccess::WRITE,
+                                .changeMode = VehiclePropertyChangeMode::STATIC,
                         },
         },
         {
@@ -1405,8 +1503,6 @@
 // public namespace
 namespace defaultconfig {
 
-typedef defaultconfig_impl::ConfigDeclaration ConfigDeclaration;
-
 inline constexpr const std::vector<ConfigDeclaration>& getDefaultConfigs() {
     return defaultconfig_impl::kVehicleProperties;
 }
diff --git a/automotive/vehicle/aidl/impl/default_config/test/Android.bp b/automotive/vehicle/aidl/impl/default_config/test/Android.bp
index 771472c..b05d47c 100644
--- a/automotive/vehicle/aidl/impl/default_config/test/Android.bp
+++ b/automotive/vehicle/aidl/impl/default_config/test/Android.bp
@@ -24,11 +24,53 @@
     defaults: ["VehicleHalDefaults"],
     srcs: ["*.cpp"],
     static_libs: [
+        "VehicleHalJsonConfigLoader",
         "VehicleHalUtils",
+        "libgmock",
         "libgtest",
     ],
     header_libs: [
+        // TODO(b/238685398): Remove this once we deprecate DefaultConfig.h
         "VehicleHalDefaultConfig",
+        "IVehicleGeneratedHeaders",
+    ],
+    shared_libs: [
+        "libjsoncpp",
+    ],
+    data: [
+        ":VehicleHalDefaultProperties_JSON",
+    ],
+    test_suites: ["device-tests"],
+}
+
+cc_test {
+    name: "VehicleHalDefaultConfigTestEnableTestProperties",
+    vendor: true,
+    defaults: ["VehicleHalDefaults"],
+    srcs: ["*.cpp"],
+    static_libs: [
+        "VehicleHalJsonConfigLoaderEnableTestProperties",
+        "VehicleHalUtils",
+        "libgmock",
+        "libgtest",
+    ],
+    cflags: [
+        // TODO(b/238685398): Remove this once we deprecate DefaultConfig.h
+        "-DENABLE_VENDOR_CLUSTER_PROPERTY_FOR_TESTING",
+        "-DENABLE_VEHICLE_HAL_TEST_PROPERTIES",
+    ],
+    header_libs: [
+        // TODO(b/238685398): Remove this once we deprecate DefaultConfig.h
+        "VehicleHalDefaultConfig",
+        "IVehicleGeneratedHeaders",
+    ],
+    shared_libs: [
+        "libjsoncpp",
+    ],
+    data: [
+        ":VehicleHalDefaultProperties_JSON",
+        ":VehicleHalTestProperties_JSON",
+        ":VehicleHalVendorClusterTestProperties_JSON",
     ],
     test_suites: ["device-tests"],
 }
diff --git a/automotive/vehicle/aidl/impl/default_config/test/DefaultConfigTest.cpp b/automotive/vehicle/aidl/impl/default_config/test/DefaultConfigTest.cpp
index baaae75..b16ea14 100644
--- a/automotive/vehicle/aidl/impl/default_config/test/DefaultConfigTest.cpp
+++ b/automotive/vehicle/aidl/impl/default_config/test/DefaultConfigTest.cpp
@@ -15,26 +15,91 @@
  */
 
 #include <DefaultConfig.h>
+#include <JsonConfigLoader.h>
 #include <VehicleUtils.h>
+#include <android-base/file.h>
+#include <gmock/gmock.h>
 #include <gtest/gtest.h>
+#include <fstream>
 
 namespace android {
 namespace hardware {
 namespace automotive {
 namespace vehicle {
-namespace defaultconfig {
 
 namespace test {
 
-TEST(DefaultConfigTest, loadDefaultConfigs) {
-    for (ConfigDeclaration config : getDefaultConfigs()) {
-        ASSERT_NE(0, config.config.prop);
-    }
+using ::android::base::Error;
+using ::android::base::Result;
+using ::testing::UnorderedElementsAreArray;
+
+constexpr char kDefaultPropertiesConfigFile[] = "DefaultProperties.json";
+
+#ifdef ENABLE_VEHICLE_HAL_TEST_PROPERTIES
+constexpr char kTestPropertiesConfigFile[] = "TestProperties.json";
+constexpr char kVendorClusterTestPropertiesConfigFile[] = "VendorClusterTestProperties.json";
+#endif  // ENABLE_VEHICLE_HAL_TEST_PROPERTIES
+
+std::string getTestFilePath(const char* filename) {
+    static std::string baseDir = android::base::GetExecutableDirectory();
+    return baseDir + "/" + filename;
 }
 
+Result<std::vector<ConfigDeclaration>> loadConfig(JsonConfigLoader& loader, const char* path) {
+    std::string configPath = getTestFilePath(path);
+    std::ifstream ifs(configPath.c_str());
+    if (!ifs) {
+        return Error() << "couldn't open %s for parsing." << configPath;
+    }
+
+    return loader.loadPropConfig(ifs);
+}
+
+TEST(DefaultConfigTest, TestloadDefaultProperties) {
+    JsonConfigLoader loader;
+    auto result = loadConfig(loader, kDefaultPropertiesConfigFile);
+
+    ASSERT_TRUE(result.ok()) << result.error().message();
+}
+
+#ifdef ENABLE_VEHICLE_HAL_TEST_PROPERTIES
+
+TEST(DefaultConfigTest, TestloadTestProperties) {
+    JsonConfigLoader loader;
+    auto result = loadConfig(loader, kTestPropertiesConfigFile);
+
+    ASSERT_TRUE(result.ok()) << result.error().message();
+}
+
+TEST(DefaultConfigTest, TestloadVendorClusterTestProperties) {
+    JsonConfigLoader loader;
+    auto result = loadConfig(loader, kVendorClusterTestPropertiesConfigFile);
+
+    ASSERT_TRUE(result.ok()) << result.error().message();
+}
+
+// TODO(b/238685398): Remove this test after we deprecate DefaultConfig.h
+TEST(DefaultConfigTest, TestCompatibleWithDefaultConfigHeader) {
+    auto configsFromHeaderFile = defaultconfig::getDefaultConfigs();
+
+    std::vector<ConfigDeclaration> configsFromJson;
+    JsonConfigLoader loader;
+    for (const char* file :
+         std::vector<const char*>({kDefaultPropertiesConfigFile, kTestPropertiesConfigFile,
+                                   kVendorClusterTestPropertiesConfigFile})) {
+        auto result = loadConfig(loader, file);
+        ASSERT_TRUE(result.ok()) << result.error().message();
+        configsFromJson.insert(configsFromJson.end(), result.value().begin(), result.value().end());
+    }
+
+    ASSERT_EQ(configsFromHeaderFile.size(), configsFromJson.size());
+    ASSERT_THAT(configsFromHeaderFile, UnorderedElementsAreArray(configsFromJson));
+}
+
+#endif  // ENABLE_VEHICLE_HAL_TEST_PROPERTIES
+
 }  // namespace test
 
-}  // namespace defaultconfig
 }  // namespace vehicle
 }  // namespace automotive
 }  // namespace hardware
diff --git a/automotive/vehicle/aidl/impl/fake_impl/hardware/include/FakeVehicleHardware.h b/automotive/vehicle/aidl/impl/fake_impl/hardware/include/FakeVehicleHardware.h
index 8cc19b1..9091fee 100644
--- a/automotive/vehicle/aidl/impl/fake_impl/hardware/include/FakeVehicleHardware.h
+++ b/automotive/vehicle/aidl/impl/fake_impl/hardware/include/FakeVehicleHardware.h
@@ -153,7 +153,7 @@
 
     void init();
     // Stores the initial value to property store.
-    void storePropInitialValue(const defaultconfig::ConfigDeclaration& config);
+    void storePropInitialValue(const ConfigDeclaration& config);
     // The callback that would be called when a vehicle property value change happens.
     void onValueChangeCallback(
             const aidl::android::hardware::automotive::vehicle::VehiclePropValue& value);
diff --git a/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp b/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp
index 7c451fe..c6ec85d 100644
--- a/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp
+++ b/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp
@@ -97,7 +97,7 @@
 
 }  // namespace
 
-void FakeVehicleHardware::storePropInitialValue(const defaultconfig::ConfigDeclaration& config) {
+void FakeVehicleHardware::storePropInitialValue(const ConfigDeclaration& config) {
     const VehiclePropConfig& vehiclePropConfig = config.config;
     int propId = vehiclePropConfig.prop;
 
diff --git a/automotive/vehicle/aidl/impl/utils/test/include/TestPropertyUtils.h b/automotive/vehicle/aidl/impl/utils/test/include/TestPropertyUtils.h
index d512713..e6ea6fe 100644
--- a/automotive/vehicle/aidl/impl/utils/test/include/TestPropertyUtils.h
+++ b/automotive/vehicle/aidl/impl/utils/test/include/TestPropertyUtils.h
@@ -35,7 +35,6 @@
 
 }  // namespace testpropertyutils_impl
 
-#ifdef ENABLE_VENDOR_CLUSTER_PROPERTY_FOR_TESTING
 // Converts the system property to the vendor property.
 // WARNING: This is only for the end-to-end testing, Should NOT include in the user build.
 inline constexpr int32_t toVendor(
@@ -55,7 +54,6 @@
         toVendor(testpropertyutils_impl::VehicleProperty::CLUSTER_REQUEST_DISPLAY);
 constexpr int32_t VENDOR_CLUSTER_NAVIGATION_STATE =
         toVendor(testpropertyutils_impl::VehicleProperty::CLUSTER_NAVIGATION_STATE);
-#endif  // ENABLE_VENDOR_CLUSTER_PROPERTY_FOR_TESTING
 
 // These properties are placeholder properties for developers to test new features without
 // implementing a real property.
diff --git a/compatibility_matrices/compatibility_matrix.current.xml b/compatibility_matrices/compatibility_matrix.current.xml
index d899c2c..ba6453d 100644
--- a/compatibility_matrices/compatibility_matrix.current.xml
+++ b/compatibility_matrices/compatibility_matrix.current.xml
@@ -112,14 +112,6 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
-        <name>android.hardware.biometrics.face</name>
-        <version>1.0</version>
-        <interface>
-            <name>IBiometricsFace</name>
-            <instance>default</instance>
-        </interface>
-    </hal>
     <hal format="aidl" optional="true">
         <name>android.hardware.biometrics.face</name>
         <version>2</version>
@@ -128,14 +120,6 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
-        <name>android.hardware.biometrics.fingerprint</name>
-        <version>2.1-3</version>
-        <interface>
-            <name>IBiometricsFingerprint</name>
-            <instance>default</instance>
-        </interface>
-    </hal>
     <hal format="aidl" optional="true">
         <name>android.hardware.biometrics.fingerprint</name>
         <version>2</version>
@@ -161,14 +145,6 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
-        <name>android.hardware.boot</name>
-        <version>1.2</version>
-        <interface>
-            <name>IBootControl</name>
-            <instance>default</instance>
-        </interface>
-    </hal>
     <hal format="aidl" optional="true">
         <name>android.hardware.boot</name>
         <interface>
@@ -502,14 +478,6 @@
             <regex-instance>.*</regex-instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
-        <name>android.hardware.nfc</name>
-        <version>1.2</version>
-        <interface>
-            <name>INfc</name>
-            <instance>default</instance>
-        </interface>
-    </hal>
     <hal format="aidl" optional="true">
         <name>android.hardware.nfc</name>
         <interface>
@@ -674,14 +642,6 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
-        <name>android.hardware.soundtrigger</name>
-        <version>2.3</version>
-        <interface>
-            <name>ISoundTriggerHw</name>
-            <instance>default</instance>
-        </interface>
-    </hal>
     <hal format="aidl" optional="true">
          <name>android.hardware.soundtrigger3</name>
          <version>1</version>
diff --git a/gatekeeper/1.0/vts/functional/VtsHalGatekeeperV1_0TargetTest.cpp b/gatekeeper/1.0/vts/functional/VtsHalGatekeeperV1_0TargetTest.cpp
index f3fa0b4..e938b01 100644
--- a/gatekeeper/1.0/vts/functional/VtsHalGatekeeperV1_0TargetTest.cpp
+++ b/gatekeeper/1.0/vts/functional/VtsHalGatekeeperV1_0TargetTest.cpp
@@ -244,6 +244,47 @@
 }
 
 /**
+ * Ensure that passwords containing a NUL byte aren't truncated
+ */
+TEST_P(GatekeeperHidlTest, PasswordIsBinaryData) {
+  GatekeeperResponse enrollRsp;
+  GatekeeperResponse verifyRsp;
+  hidl_vec<uint8_t> rightPassword = {'A', 'B', 'C', '\0', 'D', 'E', 'F'};
+  hidl_vec<uint8_t> wrongPassword = {'A', 'B', 'C', '\0', '\0', '\0', '\0'};
+
+  ALOGI("Testing Enroll+Verify of password with embedded NUL (expected success)");
+  enrollNewPassword(rightPassword, enrollRsp, true);
+  verifyPassword(rightPassword, enrollRsp.data, 1, verifyRsp, true);
+
+  ALOGI("Testing Verify of wrong password (expected failure)");
+  verifyPassword(wrongPassword, enrollRsp.data, 1, verifyRsp, false);
+
+  ALOGI("PasswordIsBinaryData test done");
+}
+
+/**
+ * Ensure that long passwords aren't truncated
+ */
+TEST_P(GatekeeperHidlTest, LongPassword) {
+  GatekeeperResponse enrollRsp;
+  GatekeeperResponse verifyRsp;
+  hidl_vec<uint8_t> password;
+
+  password.resize(64); // maximum length used by Android
+  memset(password.data(), 'A', password.size());
+
+  ALOGI("Testing Enroll+Verify of long password (expected success)");
+  enrollNewPassword(password, enrollRsp, true);
+  verifyPassword(password, enrollRsp.data, 1, verifyRsp, true);
+
+  ALOGI("Testing Verify of wrong password (expected failure)");
+  password[password.size() - 1] ^= 1;
+  verifyPassword(password, enrollRsp.data, 1, verifyRsp, false);
+
+  ALOGI("LongPassword test done");
+}
+
+/**
  * Ensure we can securely update password (keep the same
  * secure user_id) if we prove we know old password
  */