Circuit Description
The Electronic Suspension Control (ESC) module will detect ESC driver over current fault conditions and set DTC C0578, C0583, C0588 or C0593 by disabling the damper control relay. Although the ESC module will set these DTCs, each one represents a failure of the damper ESC driver within the ESC module which requires replacement of the ESC module.
Conditions for Running the DTC
The ignition ON.
Conditions for Setting the DTC
| • | The ESC module detected an internal malfunction. |
| • | The malfunction must be detected when the ignition switch is first turned ON. |
Action Taken When the DTC Sets
| • | Stores a DTC C0578, C0583, C0588 or C0593 in the ESC memory. |
| • | Depending on which internal circuitry was affected by this malfunction, the ESC module will command one of the following actions: |
| - | Command 0% PWM duty cycle in order to disable all four shock absorber solenoids. |
| - | Ignore the steering position input. |
| - | Provide shock absorber solenoid control based on the vehicle speed only. |
| - | Sends a message to the IPC to display the SERVICE RIDE CONTROL message. |
| - | Sends a message to the IPC to display the SHOCKS INOPERATIVE message. |
| • | If the disable all four shock absorber solenoids action was taken, the ESC module sends a message to the PCM to limit the speed. The PCM then sends a message to the IPC to display the MAXIMUM SPEED 129 km/h (80 mph) message. |
Conditions for Clearing the DTC
| • | Under all fault conditions, the ignition must be cycled before this DTC can change from current to history. |
| • | The ESC module no longer detects any internal malfunctions when the ignition is first turned to the ON position. |
| • | A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present. |
| • | Use the IPC clearing DTC feature. |
Diagnostic Aids
| • | Since DTC C0578, C0583, C0588 or C0593 is an internal damper driver malfunction to the ESC module, there is no repair procedure and the ESC module must be replaced. |
| • | The ESC module tests for multiple internal malfunctions and will store a DTC C0578, C0583, C0588 or C0593 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. |
Test Description
The number below refer to the step number on the diagnostic table.
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This DTC requires ESC module replacement.
