Test Description
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
The number(s) below refer to the step number(s) on the diagnostic table.
- 3. Tests for the proper operation of the ambient light sensor signal circuit in the low voltage range.
- 4. Tests for the proper operation of the ambient light sensor signal circuit in the high voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to ground.
- 5. Tests for a short to voltage in the 5 volt reference circuit.
- 13. After replacement of the BCM you must calibrate the new module for proper operation.