GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 DeVille 🢒 Body and Accessories 🢒 Body Rear End 🢒 Rear Compartment Lid Release Inoperative

Step

Action

Value(s)

Yes

No

1
  1. Place the transaxle in the PARK position.
  2. Turn the valet switch to OFF.
  3. Connect the scan tool to the data link connector (DLC).
  4. Turn the valet lockout OFF.
  5. Press the rear compartment release switch.

Does the body control module (PZM) command the rear compartment lid release ON?

--

Go to Step 2

Go to Step 6

2
  1. Disconnect the rear compartment lid release relay.
  2. Connect a test lamp between terminal D4 and ground, and terminal D6 to ground.

Does the test lamp light at both terminals?

--

Go to Step 3

Go to Step 13

3
  1. Connect the test lamp between terminal D4 and terminal D6.
  2. Press the rear compartment lid release switch.

Does the test lamp light?

--

Go to Step 4

Go to Step 14

4

Connect a fused jumper between terminal D6 and terminal C4.

Does the rear compartment lid open?

--

Go to Step 5

Go to Step 15

5

Replace the rear compartment lid release relay.

Does the rear compartment lid release operate properly?

--

Go to Rear Compartment Lid Release System Check

Go to Step 6

6

Observe the scan tool .

Does the PZM indicate that the valet switch is OFF?

--

Go to Step 7

Go to Step 10

7

Using the scan tool , observe the status of the park neutral position switch.

Does the status show that the vehicle is in PARK?

--

Go to Step 8

Go to Step 9

8

Replace the PZM. Refer to Body Control Module Replacement in Body Control System.

Does the rear compartment lid release operate properly?

--

Go to Rear Compartment Lid Release System Check

Go to Step 10

9

Inspect the park neutral position switch and any related circuits. Perform any necessary repairs.

Does the rear compartment lid release operate properly?

--

Go to Rear Compartment Lid Release System Check

Go to Step 10

10
  1. Disconnect the valet switch.
  2. Connect a fused jumper from valet lockout switch connector terminal A to ground.
  3. Observe the scan tool .

Does the PZM indicate that the valet lockout switch is OFF?

--

Go to Step 11

Go to Step 12

11
  1. Inspect CKT 151 (BLK/WHT) for an open. Repair as necessary.
  2. If OK, replace the valet lockout switch.

Does the rear compartment lid release operate properly?

--

Go to Rear Compartment Lid Release System Check

Go to Step 15

12
  1. Inspect CKT 1355 (DK BLU/WHT) for an open. Repair as necessary.
  2. If OK, replace the PZM. Refer to Body Control Module Replacement in Body Control System.

Does the rear compartment lid release operate properly?

--

Go to Rear Compartment Lid Release System Check

Go to Step 15

13

Repair the open or short to ground in one of the following circuits:

    • CKT 40 (ORN)
    • CKT 2040 (ORN)

Does the rear compartment lid release operate properly?

--

Go to Rear Compartment Lid Release System Check

Go to Step 15

14
  1. Inspect CKT 1344 (LT BLU) for an open. Repair as necessary.
  2. If OK, replace the PZM. Refer to Body Control Module Replacement in Body Control System.

Does the rear compartment lid release operate properly?

--

Go to Rear Compartment Lid Release System Check

Go to Step 15

15
  1. Ensure that the fused jumper is still connected.
  2. Disconnect the rear compartment lid release solenoid.
  3. Connect a test lamp between terminal A and ground.

Does the test lamp light?

--

Go to Step 16

Go to Step 17

16
  1. Verify that the rear compartment lid release solenoid connector is clean and tight.
  2. If OK, replace the rear compartment lid release solenoid.

Does the rear compartment lid release operate properly?

--

Go to Rear Compartment Lid Release System Check

--

17

Repair the open in CKT 56 (BLK/WHT).

Is the repair complete?

--

Go to Rear Compartment Lid Release System Check

--