C0589

Circuit Description
The LR damper actuator is controlled by the Electronic Suspension Control Module with a Pulse-Width Modulation (PWM) signal. Battery voltage is modulated (switched on and off) at a high frequency (2.0 kHz) by opening and closing the actuator circuit in the Electronic Suspension Control Module. By controlling the amount of current to the actuator, the Electronic Suspension Control Module can then control the damping force in the damper. A higher level of damping force is achieved by providing correspondingly higher current levels, relating to higher percentages of PWM duty cycle.
The default damper state (no battery voltage) is one that provides a minimum damping force.

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 the Electronic Suspension Control Module measures a feedback voltage between two preset values during two consecutive OFF-state damper diagnostic test procedures.

Action Taken When the DTC Sets
^ The LR damper actuator will be disabled by commanding 0 percent PWM duty cycle (damper control switch open).
^ The LR damper will be soft.
^ 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 an open in the actuator circuit. 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 LR solenoid operates. Command both the ON and OFF states. Repeat the commands as necessary.
3. Tests for voltage at the coil side of the LR solenoid.
4. Verifies that the Electronic Suspension Control Module is providing ground to the LR solenoid.
5. Tests if ground is constantly being applied to the LR solenoid.






DTC C0589 Left Rear Solenoid Circuit Open