Did you perform A Diagnostic System Check - Body Rear End?

Go to Step 2

Go to Diagnostic System Check - Body Rear End

2

Attempt to operate the rear compartment lid release with the trunk release switch on the headlamp switch assembly in order to verify the complaint.

Does the rear compartment lid release operate?

If the Keyless Entry system is also inoperative, refer to Keyless Entry System Inoperative in Keyless Entry.

If Keyless Entry operates normally then Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

1. Install a scan tool.
2. Turn ON the ignition with the engine OFF.
3. With the scan tool, observe the Trunk Release Switch parameter in the Non-HVAC Data list of the Instrument Panel Module (IPM).

Does the scan tool display OFF?

Go to Step 4

Go to Step 14

1. Activate the rear compartment lid release with the trunk release switch on the headlamp switch assembly.
2. With the scan tool, observe the Trunk Release Switch parameter.

Does the parameter change from OFF to ON?

Go to Step 5

Go to Step 15

1. Verify that the valet switch is in the closed position.
2. Disconnect the trunk release relay.
3. Turn ON the ignition, with the engine OFF.
4. Connect a test lamp between the coil side battery positive voltage circuit of the relay and a good ground.

Does the test lamp illuminate?

Go to Step 6

Go to Step 12

1. Connect a test lamp between the coil side feed circuit of the trunk release relay and the coil side control circuit of the trunk release relay.
2. With the scan tool, command the trunk release relay On and OFF.

Does the test lamp turn ON and OFF with each command?

Go to Step 8

Go to Step 7

Does the test lamp remain illuminated with each command?

Go to Step 18

Go to Step 17

Connect a test lamp between the switch side battery positive voltage circuit of the relay and a good ground.

Does the test lamp illuminate?

Go to Step 9

Go to Step 30

Connect a 10-amp fused jumper wire between the switch side feed circuit and the switch side control circuit of the trunk release relay.

Did the rear compartment lid release operate?

Go to Step 23

Go to Step 10

1. Disconnect the harness connector from the rear compartment lid release actuator.
2. With the 10-amp fused jumper wire still connected between the switch side feed circuit and the switch side control circuit of the relay, connect a test lamp between the control circuit and the ground circuit of the actuator harness connector.

Does the test lamp illuminate?

Go to Step 22

Go to Step 11

With the 10-amp fused jumper wire still connected between the switch side feed circuit and the switch side control circuit of the relay, connect a test lamp between the control circuit of the actuator harness connector and a good ground.

Does the test lamp illuminate?

Go to Step 31

Go to Step 27

1. Disconnect the valet switch.
2. Connect a test lamp between the input circuit of the valet switch and a good ground.

Does the test lamp illuminate?

Go to Step 13

Go to Step 28

1. Connect a fused jumper wire between the valet switch input circuit and the coil side feed circuit of the trunk release relay
2. With the test lamp connected to a good ground, probe the coil side feed circuit of the trunk release relay.

Does the test lamp illuminate?

Go to Step 26

Go to Step 29

Disconnect the rear compartment lid release switch harness connector.

Does the scan tool display OFF?

Go to Step 24

Go to Step 20

1. Disconnect the rear compartment lid release switch harness connector.
2. Connect a 3-amp fused jumper wire between the switch signal circuit and the switch ground circuit of the harness connector.
3. With the scan tool, observe the Trunk Release Switch parameter in the Non-HVAC Data list of the IPM.

Does the scan tool display ON?

Go to Step 24

Go to Step 16

1. Connect the 3-amp fused jumper wire between the switch signal circuit of the rear compartment lid release connector and a good ground.
2. With the scan tool, observe the Trunk Release Switch parameter.

Does the scan tool display ON?

Go to Step 32

Go to Step 19

Test the coil side control circuit of the trunk release relay for a short to battery positive or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 39

Go to Step 21

Test the coil side control circuit of the trunk release relay 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 39

Go to Step 21

Test for an open or a high resistance in the signal circuit of the rear compartment lid release switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 39

Go to Step 25

Test for a short to ground in the signal circuit of the rear compartment lid release switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 39

Go to Step 25

Inspect for poor connections at the harness connector of the Rear Integration Module (RIM). 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 39

Go to Step 33

Inspect for poor connections at the harness connector of the rear compartment lid release actuator. 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 39

Go to Step 34

Inspect for poor connections at the trunk release relay. 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 39

Go to Step 35

Inspect for poor connections at the harness connector of the rear compartment lid release 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 39

Go to Step 36

Inspect for poor connections at the harness connector of the Instrument Panel Module (IPM). 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 39

Go to Step 37

Inspect for poor connections at the valet 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 39

Go to Step 38

Repair the open or high resistance in the supply circuit of the rear compartment lid release actuator. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 39

--

Repair the input circuit of the valet switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 39

--

Repair the open or high resistance in the coil side feed circuit of the trunk release relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 39

--

Repair the switch side feed circuit of the rear compartment lid release relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 39

--

Repair the open or high resistance in the ground circuit of the rear compartment lid release actuator. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 39

--

Repair the open or high resistance in the ground circuit of the rear compartment lid release switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 39

--

Replace the RIM. Refer to Rear Integration Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 39

--

Replace the rear compartment lid release actuator. Refer to Rear Compartment Lid Latch Replacement .

Did you complete the replacement?

Go to Step 39

--

Replace the trunk release relay.

Did you complete the replacement?

Go to Step 39

--

Replace the rear compartment lid release switch. Refer to Headlamp Switch Replacement in Lighting Systems.

Did you complete the replacement?

Go to Step 39

--

Replace the IPM. Refer to Instrument Panel Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 39

--

Replace the valet switch.

Did you complete the replacement?

Go to Step 39

--

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2