Diagnostic Aids

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Since DTC C0690, C0691 or C0693 is an internal damper control relay malfunction to the ESC module, there is no repair procedure and the ESC module must be replaced.
The ESC module tests for multiple internal damper control relay malfunctions and will store a DTC C0690, C0691 or C0693 if one or more internal malfunctions are detected. Therefore, depending on which malfunction was detected, and what internal circuitry was affected, this DTC may cause various symptoms.