For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Driver Information System Schematics Connector End View Reference: Displays and Gages Connector End Views
1 | Did you review the Luggage Compartment Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Body Rear End
2 | Close the rear compartment. Is the trunk ajar indicator illuminated? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections
3 |

1. Install a scan tool.
2. Turn ON the ignition with the engine OFF.
3. Close the rear compartment.
4. With a scan tool observe the TRUNK OPEN SWITCH parameter in the ISU Central Locking data list.

Does the scan tool indicate the TRUNK OPEN SWITCH parameter as OPEN?

Go to Step 4

Go to Step 7

4 | Disconnect the rear compartment lid ajar switch. Is the trunk ajar indicator illuminated? | Go to Step 5 | Go to Step 6
5 | Repair a short to ground in the signal circuit of the rear compartment lid ajar switch. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 9 | --
6 | Inspect for poor connections at the harness connector of the rear compartment lid ajar switch. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 8
7 | Replace the instrument panel cluster (IPC). Refer to Instrument Cluster Replacement . Did you complete the replacement? | Go to Step 9 | --
8 | Replace the rear compartment lid ajar switch. Refer to Rear Compartment Lid Latch Replacement . Did you complete the replacement? | Go to Step 9 | --
9 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3