For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Inside Rearview Mirror Schematics Connector End View Reference: Window Systems Connector End Views
1 | Did you review the compass operation of the inside rearview mirror? | Go to Step 2 | Go to Automatic Day-Night Mirror Description and Operation
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:

• | 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

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 Inside Rearview Mirror Programming and Setup for replacement, setup, and programming. 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 Inside Rearview Mirror Programming and Setup for replacement, setup, and programming. Is the compass accurate and operating properly? | Go to Step 10 | Go to Step 8
8 | Inspect for poor connections at the harness connector of the inside rearview mirror. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. 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 for replacement, setup, and programming. Did you complete the replacement? | Go to Step 10 | --
10 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3