C0691

Circuit Description
Battery voltage for the Electronic Suspension Control damper actuator 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 drive circuit and each damper actuator high-side and low-side drive circuits for fault conditions.
DTC C0690 is used to detect a fault condition with the damper control relay contacts and associated wiring.

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 using the scan tool.

Conditions for Setting the DTC
The DTC is set when there is a loss of battery voltage in the controlled positive voltage circuit of the Electronic Suspension Control Module.

Action Taken When the DTC Sets
ALL the damper actuators will be disabled by commanding 0 % PWM duty cycle (damper control 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 diagnostics 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 battery voltage in the controlled positive voltage circuit after the ignition has been cycled. 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 module is providing ground to the damper relay.
5. Tests if ground is constantly being applied to the damper relay.









DTC C0691 Damper Control Relay Circuit Range