Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

Operate the rear compartment lid release switch.

Does the rear compartment lid release?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

1. Turn OFF the ignition.
2. Connect a scan tool.
3. Turn ON the ignition, with the engine OFF.
4. With the scan tool, navigate to the Special Functions, Miscellaneous Test screen.
5. Select Trunk Release.
6. Command the trunk release ON.

Does the rear compartment lid release?

Go to Step 4

Go to Step 6

1. Disconnect the rear compartment lid release switch.
2. Connect a fused jumper wire between the rear compartment lid release switch signal circuit and a good ground.
3. Observe the Trunk Release Switch parameter in the Keyless Entry/Remote Start data display list.

Does the parameter display active?

Go to Step 5

Go to Step 10

Connect the fused jumper wire between the rear compartment lid release switch signal circuit and the rear compartment lid release switch ground circuit.

Does the parameter display active?

Go to Step 14

Go to Step 17

1. Access the C1 harness connector of the body control module (BCM).
2. With a test lamp connected to a good ground, probe the trunk release relay control circuit of the harness connector.

Does the test lamp illuminate?

Go to Step 7

Go to Step 11

1. With the test lamp connected to battery positive voltage, probe the trunk release relay control circuit of the harness connector.
2. Command the trunk release ON.

Does the test lamp illuminate?

Go to Step 8

Go to Step 15

1. Disconnect the harness connector of the rear compartment lid release actuator.
2. Connect a test lamp between the rear compartment lid release actuator circuit of the harness connector and a good ground.
3. Command the trunk release ON.

Does the test lamp illuminate?

Go to Step 9

Go to Step 12

1. Connect the test lamp between the rear compartment lid release actuator circuit and the ground circuit of the harness connector.
2. Command the trunk release ON.

Does the test lamp illuminate?

Go to Step 16

Go to Step 18

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

Did you find and correct the condition?

Go to Step 23

Go to Step 15

Test the trunk release relay control circuit for the following:

Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 23

Go to Step 13

Test the rear compartment lid release actuator circuit for the following:

Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 23

Go to Step 13

Inspect for poor connections at the harness connector of the underhood fuse block. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 23

Go to Step 19

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 .

Did you find and correct the condition?

Go to Step 23

Go to Step 20

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

Did you find and correct the condition?

Go to Step 23

Go to Step 22

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 .

Did you find and correct the condition?

Go to Step 23

Go to Step 21

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

Did you find and correct the condition?

Go to Step 23

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

Did you find and correct the condition?

Go to Step 23

--

Replace the underhood fuse block. Refer to Underhood Electrical Center or Junction Block Bracket Replacement .

Did you complete the replacement?

Go to Step 23

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Replace the rear compartment lid release switch.

Did you complete the replacement?

Go to Step 23

--

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

Did you complete the replacement?

Go to Step 23

--

Replace the BCM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 23

--

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2