Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. 3.  This step determines if there is a problem between the steering wheel position sensor and the RTD module.
2. 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.
3. 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.
4. 8.  This step tests each steering wheel position PWM signal for a valid duty cycle.
5. 11.  The RTD module may be damaged if either of the steering wheel position PWM serial data circuits is shorted to voltage.

Fig 1: DTC C0205-C0208 (1 Of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC C0205-C0208 (2 Of 2)

Courtesy of GENERAL MOTORS CORP.