• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
The electronic suspension control module (ESCM) performs checks of internal calibration data. If a fault condition is detected, the ESCM will set the fault DTC, and may, depending upon the fault type, turn ON the SERVICE SUSPENSION SYSTEM message. Recovery from any controller fault condition is attempted only after the ignition is cycled ON and OFF.
• | Battery voltage is between 9-16 volts |
• | Ignition is ON. |
• | The DTC is set when any calibration faults internal to the ESCM are detected. |
• | The fault is detected during 3 consecutive ignition cycles, or during the same ignition cycle after clearing the DTC with the scan tool. |
• | The ESCM disables all ALC functionality. |
• | The ESCM sends a message to the instrument panel cluster (IPC) to display the SERVICE SUSPENSION SYSTEM message. |
• | A current DTC will clear when the ESCM no longer senses the malfunction and the ignition is cycled ON and OFF. |
• | The DTC will remain in history until 50 ignition cycles have occurred. |
Electronic Suspension Control Schematics
Electronic Suspension Control Description and Operation
Control Module References for scan tool information
Verify that DTC C0558 is not set.
⇒ | If the DTC is set, perform the Suspension Position Calibration procedure. If the DTC resets replace the ESCM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for ESCM replacement, setup, and programming