C0690

Circuit Description
Battery voltage for the Electronic Suspension Control damper actuators is supplied to the Electronic Suspension Control Module through the Electronic Suspension Control Module Damper Control Relay circuit. The Damper Control Relay circuit is controlled by the Electronic Suspension Control Module. The Electronic Suspension Control Module monitors the relay control circuit and each damper actuator high-side and low-side control circuit for fault conditions.

Conditions for Running the DTC
^ The ignition is on.
^ The fault is detected during three consecutive ignition cycles, or during the same ignition cycle after clearing the DTC with the scan tool.

Conditions for Setting the DTC
The DTC is set when the Electronic Suspension Control Module measures a feedback voltage less than a preset value during a damper relay OFF state.

Action Taken When the DTC Sets
^ ALL the damper actuators will be disabled by commanding 0% PWM duty cycle (ground switch open).
^ The vehicle ride will be soft.
^ The vehicle speed will be limited.
^ The SERVICE RIDE CONTROL message will be displayed.

Conditions for Clearing the MIL/DTC
^ The scan tool can be used to clear the DTC.
^ The On-Board diagnostic CLEAR RSS CODES feature can be used to clear the DTC.
^ The DTC is saved as history when the Electronic Suspension Control Module no longer sees a low feedback voltage during a damper relay OFF state. The DTC will clear if the fault does not return after 50 consecutive ignition cycles.

Diagnostic Aids
Refer to Testing for Intermittent and Poor Connections in Wiring Systems.

Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
2. Listen for an audible click when the damper relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
3. Tests for voltage at the coil side of the damper relay. The CVRTD fuse supplies power to the coil side of the damper relay.
4. Verifies that the Electronic Suspension Control Module is providing ground to the damper relay.
5. Tests if ground is constantly being applied to the damper relay.