Test Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers on the diagnostic table.
- Listen for an audible click when the encoder motor brake operates. Command both the ON and OFF states. Repeat the commands as necessary.
- This step tests for voltage at the lock solenoid feed side of the encoder motor lock solenoid.
- This step verifies that the lock solenoid battery positive circuit is not shorted to power, shorted to ground, or have high resistance.
- This step determines if the encoder motor lock solenoid is faulty by checking the internal resistance.
- This step tests the control circuit of the encoder motor brake for a short to voltage or an open.
- This step determines if a corroded or damaged connector in the encoder motor harness is the cause