GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2005 🢒 STS 🢒 Body 🢒 Body Rear End 🢒 Trunk Release Inoperative

Trunk Release Inoperative Interior Release Inoperative

Interior Release for Rear Compartment Lid 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

Press the rear compartment lid release switch on the driver door.

Does the rear compartment lid open?

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

Go to Step 3

3
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF, car in PARK.
  3. With a scan tool, view the Valet Switch input parameter in the instrument panel module (IPM) data list.

Is the Valet Switch state ACTIVE?

Go to Step 4

Go to Step 5

4
  1. Locate the valet switch in the instrument panel (I/P) compartment.
  2. While viewing the Valet Switch parameter with the scan tool, operate the valet switch.

Does the Valet Switch state change?

Go to Step 29

Go to Step 11

5
  1. With a scan tool, view the Trunk Release Switch input parameter in the driver door switch (DDS) data list.
  2. Operate the rear compartment lid release switch.

Does the parameter change state?

Go to Step 8

Go to Step 6

6
  1. Disconnect the rear compartment lid release switch.
  2. With a scan tool, view the Trunk Release Switch input parameter in the DDS data list.
  3. Connect a 3-amp fused jumper between the rear compartment lid release switch signal circuit and a good ground.

Does the parameter change state?

Go to Step 7

Go to Step 12

7
  1. With a scan tool, view the Trunk Release Switch input parameter in the RIM data list.
  2. Connect a 3-amp fused jumper between the rear compartment lid release switch signal circuit and the rear compartment lid release switch ground circuit.

Does the parameter change state?

Go to Step 16

Go to Step 21

8
  1. Disconnect the rear compartment lid release actuator.
  2. Connect a test lamp between the rear compartment lid release actuator supply voltage circuit and a good ground.
  3. With a scan tool, command the rear compartment lid release ON.

Does the test lamp turn ON for 1 second?

Go to Step 9

Go to Step 10

9
  1. Connect a test lamp between the rear compartment lid release actuator supply voltage circuit and the rear compartment lid release actuator ground circuit.
  2. Command the rear compartment lid release ON.

Does the test lamp turn ON for 1 second?

Go to Step 19

Go to Step 22

10
  1. Remove the Trunk Door Release Relay
  2. With the appropriate terminal adapters, connect a test lamp between the supply voltage circuit and the trunk release relay control circuit cavities.
  3. Command the rear compartment release relay ON.

Does the test lamp turn ON for 1 second?

Go to Step 13

Go to Step 14

11

Test the valet lockout switch signal circuit for a short to battery. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 29

Go to Step 15

12

Test the rear compartment lid release switch signal circuit for high resistance 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 17

13

Test the rear compartment lid release actuator supply voltage circuit for high resistance 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 18

14

Test the trunk release relay control circuit for high resistance 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 20

15

Inspect for poor connections at the harness connector of the valet lockout 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 23

16

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 29

Go to Step 24

17

Inspect for poor connections at the harness connector of the DDS. 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

18

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 26

19

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 29

Go to Step 27

20

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 29

Go to Step 28

21

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

Did you complete the repair?

Go to Step 29

--

22

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

Did you complete the repair?

Go to Step 29

--

23

Replace the valet lockout switch. Refer to Rear Compartment Lid Valet Lock Out Switch Replacement .

Did you complete the replacement?

Go to Step 29

--

24

Replace the rear compartment lid release switch located on the drivers door trim panel. Refer to Rear Compartment Lid Switch Replacement .

Did you complete the replacement?

Go to Step 29

--

25

Replace the driver door switch. Refer to Front Door Switch Replacement in Doors.

Did you complete the replacement?

Go to Step 29

--

26

Replace the trunk release relay.

Did you complete the replacement?

Go to Step 29

--

27

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

Did you complete the replacement?

Go to Step 29

--

28

Replace the RIM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

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 3

Trunk Release Inoperative Exterior Release Inoperative

Exterior Release for Rear Compartment Lid Inoperative

Step

Action

Yes

No

Schematic Reference: Keyless Entry 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

Having a keyless entry transmitters with you, press the exterior trunk switch on the rear compartment lid.

Does the rear compartment lid open?

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

Go to Step 3

3
  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 Switch input parameter in the Remote Control Door Lock (RCDLR) data list.
  4. Having a keyless entry transmitters with you, press the exterior trunk switch on the rear compartment lid.

Does the trunk release switch change states?

Go to Keyless Entry System Inoperative in Keyless Entry

Go to Step 4

4
  1. With a scan tool, view the Trunk Release Switch input parameter in the RCDLR data list.
  2. Connect a 3-amp fused jumper between the trunk release control circuit and a good ground.

Does the parameter change state?

Go to Step 5

Go to Step 6

5
  1. With a scan tool, view the Trunk Release Switch input parameter in the RCDLR data list.
  2. Connect a 3-amp fused jumper between the trunk release control circuit and the exterior trunk switch ground circuit.

Does the parameter change state?

Go to Step 8

Go to Step 7

6

Test the trunk release control circuit for high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 9

7

Repair the high resistance or open in the ground circuit of the exterior trunk switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 12

--

8

Inspect for poor connections at the harness connector of the exterior trunk 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 12

Go to Step 10

9

Inspect for poor connections at the harness connector of the RCDLR. 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 12

Go to Step 11

10

Replace the exterior trunk switch. Refer to Rear Compartment Lid Switch Replacement .

Did you complete the replacement?

Go to Step 12

--

11

Replace the RCDLR. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 12

--

12

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3