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Trunk Release Inoperative

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
Trunk Release Inoperative

Step Action Yes No
Schematic Reference:  Body Rear End Schematics  
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF, car in PARK.
  3. With a scan tool, view the trunk release output parameter in the remote function actuator (RFA).
  4. With a scan tool, command the trunk release ON and OFF.
Does the parameter change state?		 Go to Step 3  Go to Step 22 
3 Does the rear compartment lid release operate? Go to Step 4  Go to Step 9 
4
  1. With a scan tool, view the trunk release switch parameter in the body control module (BCM).
  2. Press the trunk release switch.
Does the parameter change state?		 Go to Step 7  Go to Step 5 
5
  1. Disconnect the rear compartment lid release switch.
  2. Connect a fused jumper between the battery positive voltage supply circuit of the trunk release switch and the ground circuit of the trunk release switch.
  3. View the trunk release switch parameter.
Does the parameter change state?		 Go to Step 21  Go to Step 6 
6
  1. Connect a fused jumper between the battery positive voltage supply circuit of the trunk release switch and a good ground.
  2. View the trunk release switch parameter.
Does the parameter change state?		 Go to Step 17  Go to Step 18 
7
  1. Remove the trunk release relay.
  2. Disconnect the trunk release actuator.
  3. Install a fused jumper wire between the battery positive voltage circuit of the trunk release relay and the trunk release actuator supply circuit of the trunk release relay.
  4. Connect a test lamp between supply circuit of the trunk release actuator and the ground circuit of the trunk release actuator.
Does the test lamp illuminate?		 Go to Step 20  Go to Step 8 
8 Connect a test lamp between the supply circuit of the trunk release actuator and a good ground.
Does the test lamp illuminate?		 Go to Step 16  Go to Step 15 
9
  1. Remove the trunk release relay.
  2. Connect a test lamp between the battery positive voltage circuit of the trunk release relay and a good ground.
Does the test lamp illuminate?		 Go to Step 10  Go to Step 14 
10
  1. Connect a test lamp between the battery positive voltage circuit of the trunk release relay and the control circuit of the rear compartment lid release relay.
  2. Press the trunk release button.
Does the test lamp turn ON and OFF with each command?		 Go to Step 19  Go to Step 11 
11 Did the test lamp remain illuminated with each command? Go to Step 13  Go to Step 12 
12 Test the control circuit of the trunk release relay for a short to voltage or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 29  Go to Step 22 
13 Test the control circuit of the trunk release relay for a short to ground. Refer to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 29  Go to Step 22 
14 Repair the high resistance or open in the control circuit of the trunk release relay. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 Go to Step 29  -
15 Repair the high resistance or open in the control circuit of the trunk release actuator. Refer to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 29  -
16 Repair the high resistance or open in the ground circuit of the trunk release actuator. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 Go to Step 29  -
17 Repair the high resistance or open in the ground circuit of the trunk release switch. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 Go to Step 29  -
18 Test the control circuit of the trunk release switch for a high resistance or open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find or correct the condition?		 Go to Step 29  Go to Step 23 
19 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 29  Go to Step 24 
20 Inspect for poor connections at the trunk 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 29  Go to Step 25 
21 Inspect for poor connections at the harness connector of the trunk 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 29  Go to Step 26 
22 Inspect for poor connections at the harness connector of the RFA. 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 29  Go to Step 27 
23 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 29  Go to Step 28 
24 Replace the trunk release relay.
Did you complete the replacement?		 Go to Step 29  -
25 Replace the trunk release actuator.
Did you complete the replacement?		 Go to Step 29  -
26 Replace the trunk release switch.
Did you complete the replacement?		 Go to Step 29  -
27 Replace the RFA.
Did you complete the replacement?		 Go to Step 29  -
28
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 29  -
29 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 2 
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