GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Inside Rearview Mirror Schematics

Connector End View Reference: Stationary Windows Connector End Views

1

Did you review the compass operation of the inside rearview mirror and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Stationary Windows

2

Does the automatic day-night feature of the inside rearview mirror operate correctly?

Go to Step 3

Go to Automatic Day-Night Mirrors Inoperative

3

  1. Turn ON the ignition, with the engine OFF.
  2. Turn ON the compass.
  3. Verify that the compass has one of the following conditions:
  4. • An incorrect reading on the display
    • The letter C or CAL is displayed.
    • The compass display is blank.

Does the compass have one of the conditions mentioned above?

Go to Step 4

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

4

Is the compass display totally blank?

Go to Step 8

Go to Step 5

5

Is the letter C or CAL displayed on the mirror?

Go to Step 6

Go to Step 7

6

Perform the compass calibration procedure. Refer to Compass Calibration and Magnetic Variance .

Is the compass accurate and operating properly?

Go to Step 10

Go to Step 7

7

Perform the compass magnetic variation adjustment procedure. Refer to Compass Calibration and Magnetic Variance .

Is the compass accurate and operating properly?

Go to Step 10

Go to Step 8

8

Inspect for a poor connection at the harness connector of the inside rearview 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 10

Go to Step 9

9

Replace the inside rearview mirror. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 10

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10

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3