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 numbers below refer to the step numbers on the diagnostic table.
- 3. This step determines if there is a problem between the steering wheel position sensor and the RTD module.
- 5. This step tests for voltages supplied to the RTD module from the EBCM. A short to voltage is indicated if voltage on either circuit measures greater than 5.25 volts.
- 7. This step tests each steering wheel position PWM signal for a valid Hz frequency. Each measurement is made by backprobing one steering wheel position PWM signal circuit at the RTD module harness connector with one DMM lead and connecting the other DMM lead to a good ground.
- 8. This step tests each steering wheel position PWM signal for a valid duty cycle.
- 11. The RTD module may be damaged if either of the steering wheel position PWM serial data circuits is shorted to voltage.