Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The Service 4 Wheel Steer indicator in IPC will be displayed.
The code is displayed on the scan tool as DTC C0527.
The output comm and to the motor is zeroed and the motor drive circuits are disabled using commands from the rear wheel steering control module to open the motor shorting relay.
The rear wheels will be returned to the centered position.