Schematic Reference: Body Rear End Schematics

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. Close the trunk.
4. With a scan tool, observe the Trunk Ajar Switch parameter in the body control module (BCM) data list.

Does the scan tool display Off?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

1. Turn OFF the ignition.
2. Disconnect the trunk ajar switch.
3. Turn ON the ignition, with the engine OFF.
4. With a scan tool, observe the trunk ajar switch parameter.

Does the scan tool display Off?

Go to Step 5

Go to Step 4

Test the control circuit of the trunk ajar switch for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 6

Inspect for poor connections at the harness connector of the trunk ajar switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 7

Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 8

Replace the trunk ajar switch.

Did you complete the replacement?

Go to Step 9

--

Important: When replacing the BCM refer to Control Module References in Computer/Integrating Systems.

Replace the BCM. Refer to Control Module References in Computer/Integrating Systems.

Did you complete the replacement?

Go to Step 9

--

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2