Pinpoint Test H: The Luggage Compartment Lamp Is Inoperative/Always On
Interior Lighting
Pinpoint Test H: The Luggage Compartment Lamp Is Inoperative/Always On
Normal Operation
The Smart Junction Box (SJB) supplies voltage to the luggage compartment lamp when the battery saver relay is energized. The luggage compartment lamp ground is a series circuit that is comprised of 2 circuits and the luggage compartment ajar switch. When the luggage compartment lid is ajar, the ajar switch closes and completes the ground path by connecting the circuit. The battery saver function provides automatic shutoff of the interior lamps (courtesy lamps and demand lamps) after 10 minutes have elapsed in order to save battery power.
- DTC B1331 (Decklid Ajar Rear Door Circuit Failure)- an on-demand DTC that sets when the SJB (Smart Junction Box) detects an open from the luggage compartment ajar input circuit to the SJB (Smart Junction Box).
- DTC B1178:13 (Boot/Trunk Ajar Switch: Circuit Open)- an on-demand DTC that sets when the Remote Function Actuator (RFA) module detects an open from the luggage compartment ajar input circuit to the RFA (Remote Function Actuator) module.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Luggage compartment lamp
- Luggage compartment lid latch
- SJB (Smart Junction Box)
- RFA (Remote Function Actuator) module
PINPOINT TEST H : THE LUGGAGE COMPARTMENT LAMP IS INOPERATIVE/ALWAYS ON
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Make sure all other demand lamps are operating before continuing this pinpoint test.
H1 CHECK THE LUGGAGE COMPARTMENT LATCH
- Open the luggage compartment using the luggage compartment release switch in the glove box.
Does the luggage compartment open?
Yes
GO to H2.
No
REFER to Doors, Hood and Trunk &/or Locks.
H2 CHECK THE LUGGAGE COMPARTMENT AJAR PID
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB (Smart Junction Box) (Without Intelligent Access (IA)) or RFA (Remote Function Actuator) Module (With IA (Intelligent Access)) DataLogger.
- For vehicles without IA (Intelligent Access), monitor the SJB (Smart Junction Box) luggage compartment ajar switch PID (DECKLID) while opening and closing the luggage compartment.
- For vehicles with IA (Intelligent Access), monitor the RFA (Remote Function Actuator) module luggage compartment ajar switch PID (Trunk_Ajar_Sw) while opening and closing the luggage compartment.
Does the luggage compartment ajar switch PID value agree with the luggage compartment positions?
Yes
GO to H5.
No
GO to H3.
H3 CHECK THE LUGGAGE COMPARTMENT AJAR SWITCH
- Disconnect: Luggage Compartment Lid Latch C429.
- Enter the following diagnostic mode on the scan tool: SJB (Smart Junction Box) (Without IA (Intelligent Access)) or RFA (Remote Function Actuator) Module (With IA (Intelligent Access)) DataLogger.
- For vehicles without IA (Intelligent Access), monitor the SJB (Smart Junction Box) luggage compartment ajar switch PID (DECKLID).
- For vehicles with IA (Intelligent Access), monitor the RFA (Remote Function Actuator) module luggage compartment ajar switch PID (Trunk_Ajar_Sw).
- Connect a fused jumper wire between the luggage compartment latch C429-1, circuit CPL58 (GY/OG), harness side and the luggage compartment latch C429-4, circuit GD149 (BK/GY), harness side.
Does the luggage compartment ajar switch PID indicate ajar with the jumper wire removed and closed with the jumper wire connected?
Yes
REMOVE the jumper wire. INSTALL a new luggage compartment lid latch. TEST the system for normal operation.
No
REMOVE the jumper wire. GO to H4.
H4 CHECK THE LUGGAGE COMPARTMENT LID LATCH CIRCUIT FOR AN OPEN AND SHORT TO GROUND
- Ignition OFF.
- Disconnect: SJB (Smart Junction Box) C2280C (Vehicles Without IA (Intelligent Access)).
- Disconnect: RFA (Remote Function Actuator) Module C2153E (Vehicles With IA (Intelligent Access)).
- For vehicles without IA (Intelligent Access), measure the resistance between the luggage compartment lid latch C429-1, circuit CPL58 (GY/OG), harness side and the SJB (Smart Junction Box) C2280C-16, circuit CPL58 (GY/OG), harness side; and between the luggage compartment lid latch C429-1, circuit CPL58 (GY/OG), harness side and ground.
- For vehicles with IA (Intelligent Access), measure the resistance between the luggage compartment lid latch C429-1, circuit CPL58 (GY/OG), harness side and the RFA (Remote Function Actuator) module C2153E-22, circuit CPL58 (GY/OG), harness side; and between the luggage compartment lid latch C429-1, circuit CPL58 (GY/OG), harness side and ground.
Is the resistance less than 5 ohms between the luggage compartment lid latch and the SJB (Smart Junction Box) or the RFA (Remote Function Actuator) module, and greater than 10,000 ohms between the luggage compartment lid latch and ground?
Yes
For vehicles without IA (Intelligent Access), GO to H8.
For vehicles with IA (Intelligent Access), GO to H9.
No
REPAIR circuit CPL58 (GY/OG) for an open or short to ground, as necessary. CLEAR the DTCs. REPEAT the self-test.
H5 CHECK FOR VOLTAGE TO THE LUGGAGE COMPARTMENT LAMP
- Disconnect: Inoperative Luggage Compartment Lamp.
- Ignition ON.
- Measure the voltage between the LH luggage compartment lamp C4198-1, circuit CLN09 (YE/GN), harness side and ground; or between the RH luggage compartment lamp C428-1, circuit CLN09 (YE/GN), harness side and ground.
Is the voltage greater than 10 volts?
Yes
GO to H6.
No
REPAIR circuit CLN09 (YE/GN) for an open. TEST the system for normal operation.
H6 CHECK THE LUGGAGE COMPARTMENT LATCH
- Disconnect: Luggage Compartment Lid Latch C429.
- Connect: Inoperative Luggage Compartment Lamp.
- Monitor the luggage compartment lamp.
- Connect a fused jumper wire between the luggage compartment lid latch C429-2, circuit CLN13 (WH/BU), harness side, and the luggage compartment lid latch C429-4, circuit GD149 (BK/GY), harness side.
Is the luggage compartment lamp illuminated with the jumper wire installed and off with it removed?
Yes
REMOVE the jumper wire. INSTALL a new luggage compartment lid latch. TEST the system for normal operation.
No
REMOVE the jumper wire. GO to H7.
H7 CHECK THE LUGGAGE COMPARTMENT LAMPS CIRCUIT FOR AN OPEN AND SHORT TO GROUND
- Ignition OFF.
- Disconnect: Inoperative Luggage Compartment Lamp.
- For the LH luggage compartment lamp, measure the resistance between the luggage compartment lid latch C429-2, circuit CLN13 (WH/BU), harness side and the LH luggage compartment lamp C4198-2, CLN13 (WH/BU), harness side; and between the luggage compartment lid latch C429-2, circuit CLN13 (WH/BU), harness side and ground.
- For the RH luggage compartment lamp, measure the resistance between the luggage compartment lid latch C429-2, circuit CLN13 (WH/BU), harness side and the RH luggage compartment lamp C428-2, CLN13 (WH/BU), harness side; and between the luggage compartment lid latch C429-2, circuit CLN13 (WH/BU), harness side and ground.
Is the resistance less than 5 ohms between the luggage compartment lid latch and the luggage compartment lamp, and greater than 10,000 ohms between the luggage compartment lid latch and ground?
Yes
INSTALL a new luggage compartment lamp in question. TEST the system for normal operation.
No
REPAIR circuit CLN13 (WH/BU) for an open or short to ground, as necessary. TEST the system for normal operation.
H8 CHECK FOR CORRECT SJB (Smart Junction Box) OPERATION
- Disconnect all the SJB (Smart Junction Box) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB (Smart Junction Box) connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new SJB (Smart Junction Box). TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
H9 CHECK FOR CORRECT RFA (Remote Function Actuator) MODULE OPERATION
- Disconnect all the RFA (Remote Function Actuator) module connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the RFA (Remote Function Actuator) module connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new RFA (Remote Function Actuator) module. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.