GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Outside Rearview Mirror Schematics

Connector End View Reference: Power Door Systems Connector End Views

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 Power Mirrors - Folding Inoperative complaint is present.

Does the power folding mirrors system operate as described in the Description and Operation?

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

Go to Step 3

3

  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 momentarily pressing the power mirror fold switch.

Does the parameter display In or Out when momentarily pressing the fold switch, and Idle when it is not momentarily pressed?

Go to Step 4

Go to Step 9

4

  1. Turn OFF the ignition
  2. Disconnect the door module C5 harness connector from the door module associated with the inoperative mirror.
  3. Connect a test lamp between the extend and retract circuits at the door module pins.
  4. Turn ON the ignition, with the engine OFF.
  5. Observe the test lamp, while momentarily pressing the fold switch.

Does the test lamp illuminate each time the fold switch is momentarily pressed?

Go to Step 5

Go to Step 8

5

Test the folding mirror motor control circuits of the inoperative mirror for an open, or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 13

Go to Step  6

6

Test the folding mirror motor control circuits of the inoperative mirror for a short to battery voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 13

Go to Step 7

7

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?

Go to Step 13

Go to Step 10

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?

Go to Step 13

Go to Step 11

9

Inspect for poor connections at the harness connector of the driver door switch assembly (DDSA). 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 13

Go to Step 12

10

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

Did you complete the repair?

Go to Step  13

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11

Important: Perform the setup procedure for the replacement door module. Refer to Door Control Module Programming and Setup in Programming and Setup.

Replace the door module. Refer to Control Module References in Computer/Integrating Systems.

Did you complete the repair?

Go to Step 13

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12

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

Did you complete the repair?

Go to Step 13

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13

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2