GM Service Manual Online
For 1990-2009 cars only

Diagnostic Aids

The door open switches are an integral part of each door lock and are not serviced separately.

Step

Action

Yes

No

Schematic Reference: Door Lock/Indicator Schematics

Connector End View Reference: Vehicle Access Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

Verify that the automatic door locks are inoperative.

Do the automatic door locks operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Verify that the automatic door locks feature is enabled. Refer to Power Door Locks Description and Operation

Are the automatic door locks enabled?

Go to Step 4

Go to Power Door Locks Description and Operation

4

Do the power door locks operate normally?

Go to Step 5

Go to Power Door Locks Inoperative - All Doors and Switches

5

  1. Close all of the doors.
  2. With a scan tool, observe the parameter of each door open switch in the body control module (BCM), Data Display, Inputs List:
  3. • Left front (LF) Door Open Switch
    • Left rear (LR) Door Open Switch
    • Right front (RF) Door Open Switch
    • Right rear (RR) Door Open Switch

Does the scan tool display Closed for all doors?

Go to Step 9

Go to Step 6

6

Important:: The door open switch is an integral part of the door lock.

  1. Disconnect the harness connector of the inoperative door open switch.
  2. With a scan tool, observe the inoperative Door Open Switch parameter in the Data Display, Inputs list of the BCM.

Does the scan tool display Closed?

Go to Step 8

Go to Step 7

7

Test the door open switch signal circuit of the harness connector for a short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 12

Go to Step 9

8

Inspect for poor connections at the harness connectors of the inoperative door lock. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

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 BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 12

Go to Step 11

10

Replace the inoperative door lock. Refer to Front Side Door Lock Replacement and Rear Door Lock Replacement .

Did you complete the replacement?

Go to Step 12

--

11

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

Did you complete the repair?

Go to Step 12

--

12

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2