Pinpoint Test H: The Luggage Compartment Lamp Is Inoperative
Interior Lighting
Pinpoint Test H: The Luggage Compartment Lamp Is Inoperative
Refer to Wiring Diagram Set 89, Interior Lamps for schematic and connector information. Diagrams By Number
Normal Operation
The luggage compartment lamp is controlled by the Lighting Control Module (LCM). The LCM receives a signal from the luggage compartment lid ajar switch through circuit 486 (BR/WT). When the luggage compartment lid is opened, the luggage compartment lid ajar switch closes and signals the LCM. The luggage lamp is supplied voltage through circuit 705 (LG/OG). The LCM controls the ground side of the luggage compartment lamp through circuit 1092 (PK/OG).
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Luggage lamp assembly
- Luggage compartment lid latch
- LCM
PINPOINT TEST H: THE LUGGAGE COMPARTMENT LAMP IS INOPERATIVE
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H1 CHECK THE DECKLID AJAR PID STATUS WITH THE SCAN TOOL
- Ignition ON.
- Open the luggage compartment lid.
- Enter the following diagnostic mode on the scan tool: LCM DataLogger.
- Monitor the LCM luggage compartment lid PID (DECKLID).
- Does the PID match the luggage compartment lid position?
Yes
GO to H2.
No
GO to H5.
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H2 CHECK CIRCUIT 705 (LG/OG) FOR AN OPEN
- Disconnect: Luggage Compartment Lamp C428.
- Measure the voltage between the luggage compartment lamp C428-1, circuit 705 (LG/OG), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to H3.
No
REPAIR the circuit. TEST the system for normal operation.
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H3 CHECK CIRCUIT 1092 (PK/OG) FOR AN OPEN
- Disconnect: LCM C2145d.
- Measure the resistance between the LCM C2145d-9, circuit 1092 (PK/OG), harness side and the luggage compartment lamp C428-2, circuit 1092 (PK/OG), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to H4.
No
REPAIR the circuit. TEST the system for normal operation.
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H4 CHECK THE LUGGAGE COMPARTMENT LAMP OPERATION
- Connect: Luggage Compartment Lamp C428.
- Connect a fused jumper wire between the LCM C2145d-9, circuit 1092 (PK/OG), harness side and ground.
- Does the luggage lamp illuminate?
Yes
REMOVE the jumper wire. GO to H8.
No
REMOVE the jumper wire. INSTALL a new luggage compartment lamp assembly. TEST the system for normal operation.
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H5 CHECK THE LUGGAGE COMPARTMENT LID RELEASE SOLENOID OPERATION
- Operate the luggage compartment lid release solenoid.
- Does the luggage compartment lid release operate?
Yes
GO to H6.
No
REFER to Locks to continue diagnosis of the luggage compartment lid release system.
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H6 CHECK THE LUGGAGE COMPARTMENT LID AJAR SWITCH
- Ignition OFF.
- Disconnect: Luggage Compartment Lid Latch C430.
- Connect a fused jumper wire between the luggage compartment lid latch C430-1, circuit 486 (BN/WH), harness side and the luggage compartment lid latch C430-3, circuit 57 (BK), harness side.
- Does the luggage compartment lamp illuminate?
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.
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H7 CHECK CIRCUIT 486 (BN/WH) FOR AN OPEN
- Disconnect: LCM C2145b.
- Measure the resistance between the luggage compartment lid ajar switch C430-1, circuit 486 (BN/WH), harness side and the LCM 2145b-4, circuit 486 (BN/WH), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to H8.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
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H8 CHECK FOR CORRECT LCM OPERATION
- Disconnect all the LCM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the LCM 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 LCM. 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. TEST the system for normal operation.
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