Diagnostic Aids
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- The following conditions may cause an intermittent malfunction:
- An intermittent open, or short to ground or voltage on the steering position sensor signal circuit.
- Intermittent operation of the EBCM.
- If the ESC module does not receive a valid steering position PWM signal from the EBCM, the ESC system will still function, but will ignore the steering position PWM signal. The ESC system uses lateral acceleration data sent from the EBCM on the serial data line in order to substitute for a loss of the steering position PWM signal.
- The ESC module uses an ignition cycle counter diagnostic approach to set this DTC. This requires the ESC module to detect the malfunction 4 times before setting the DTC. To disable this feature, use a scan tool to clear all DTCs before preforming diagnostic procedures.
- An intermittent open, or short to ground or voltage on the steering position PWM circuit may cause a random firm/soft ride condition.
- If the DTC is a history DTC, the problem may be intermittent. Using a scan tool, monitor the steering position sensor circuit while moving the related wiring and connectors. This can often cause the malfunction to appear.