GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform A Diagnostic System Check - Power Door Systems?

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Go to Step 2

Go to Diagnostic System Check - Power Door Systems

2

  1. Turn OFF the ignition.
  2. Install a scan tool.
  3. Turn ON the ignition ,with the engine OFF.
  4. Observe the Mirror Fold Switch parameter in the Driver Door Switch Inputs list while activating the Fold switch on the driver door switch assembly.

Does the Mirror Fold Switch parameter display In or Out after momentarily pressing the Fold switch, and then Idle as expected?

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Go to Step 3

Go to Step 10

3

  1. Adjust the scan tool to display the door module Outputs data of the door module associated with the inoperative mirror.
  2. With the scan tool, observe the Mirror Motor Outputs parameter while activating the Fold switch to the Fold IN and the Fold Out positions.

Does the scan tool display Fold In and Fold Out as expected?

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Go to Step 4

Go to Step 8

4

Test the motor control circuits of the inoperative mirror for an open, or a short to ground.

Did you find and correct the condition?

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Go to Step 12

Go to Step 5

5

Test the motor control circuits of the inoperative mirror for a short to battery voltage.

Did you find and correct the condition?

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Go to Step 12

Go to Step 6

6

Inspect for poor connections at the harness connector of the inoperative power mirror. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 12

Go to Step 7

7

Replace the inoperative power mirror. Refer to Power Mirror Replacement .

Did you complete the repair?

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Go to Step 12

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8

Inspect for poor connections at the harness connector of the door module associated with the inoperative mirror. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 12

Go to Step 9

9

Replace the door module associated with the inoperative mirror. Refer to Door Control Module Replacement .

Did you complete the repair?

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Go to Step 12

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10

Inspect for poor connections at the harness connector of the driver door switch assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 12

Go to Step 11

11

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

Did you complete the repair?

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Go to Step 12

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12

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2