C0584

Circuit Description
The RF 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) thus, controlling the amount of current delivered to the actuator. 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 percentage s 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, on.
^ The fault 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 between two threshold values during two consecutive damper diagnostic test procedures. The threshold voltages required to set the DTC varies based upon battery voltage and the PWM signal.

Action Taken When the DTC Sets
^ The RF damper actuator will be disabled by commanding 0 percent PWM duty cycle (ground switch open).
^ The RF corner of the vehicle 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 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 an open in the actuator circuit. The DTC will clear if the fault does 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.
3. Tests for voltage at the coil side of the RF strut actuator.
4. Verifies that the Electronic Suspension Control Module is providing ground to the RF strut actuator.
5. Tests if ground is constantly being applied to the RF strut actuator.