GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Body Rear End Schematics

Connector End View Reference: Body Rear End Connector End Views

DEFINITION: Diagnosis of the liftgate ajar indicator displays AJAR when the liftgate door is completely closed.

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

Verify that the liftgate ajar indicator malfunction complaint is present.

Does the liftgate ajar indicator system operate as described in the system description and operation?

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.
  3. Close the liftgate.
  4. With the scan tool, observe the Lift Gate Ajar Indicator Switch parameter in the Data Display, Inputs list of the Rear Integration Module.

Does the scan tool indicate that the Lift Gate Ajar Switch parameter is in the Closed state?

Go to Step 4

Go to Step 5

4

  1. Open the liftgate.
  2. With the scan tool, observe the Lift Gate Ajar Indicator Switch parameter in the Data Display, Inputs list of the Rear Integration Module.

Does the scan tool indicate that the Lift Gate Ajar Switch parameter is in the Ajar state?

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

Go to Rear Hatch/Gate Ajar Indicator Inoperative

5

  1. Turn OFF the ignition.
  2. Disconnect the harness connector of the liftgate lock actuator.
  3. Turn ON the ignition, with the engine OFF.
  4. With the scan tool, observe the Lift Gate Ajar Indicator Switch parameter in the Data Display, Inputs list of the Rear Integration Module.

Does the scan tool display Closed?

Go to Step 8

Go to Step 6

6

Test the liftgate ajar switch signal circuit 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 12

Go to Step 7

7

Inspect for poor connections at the harness connector of the rear integration module. 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

8

Inspect for poor connections at the harness connector of the liftgate lock 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 12

Go to Step 11

9

Repair the open ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 12

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10

Replace the rear integration module (RIM). Refer to Rear Integration Body Control Module Replacement in Computer/Integrating Systems.

Did you complete the replacement?

Go to Step 12

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11

Replace the liftgate lock actuator. Refer to Liftgate Latch Replacement .

Did you complete the replacement?

Go to Step 12

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12

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2