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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1740 (Mirror System & Window System) >> Diagnostic Information and Procedures >> Mirrors - Compass Display Inoperative or Inaccurate

Mirrors - Compass Display Inoperative or Inaccurate

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Mirrors - Compass Display Inoperative or Inaccurate

Step Action Yes No
Schematic Reference: Inside Rearview Mirror Schematics 
Connector End View Reference: Master Electrical Component List in Wiring Systems
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 Mirrors - Automatic Day-Night 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 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 Variance Procedure .
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 Variance Procedure .
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 to Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 10  Go to Step 9 
9
IMPORTANT: Perform Compass Calibration and Variance Procedure  for the inside rearview mirror with compass after replacement.
Replace the inside rearview mirror. Refer to Rearview Mirror Replacement .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