Automatic Level Control
DTC C0558
Circuit Description
The automatic level control (ALC) sensor performs checks of internal calibration data. If a fault condition is detected, the ALC sensor 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.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0558 Calibration Data Not Programmed
This vehicle has DTCs which include DTC Symptoms. For more information on DTC Symptoms, refer to DTC Symptom Description.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
* The DTC is set when any calibration faults internal to the ALC sensor 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.
Action Taken When the DTC Sets
* Disable all functionality.
* Sends a message to the instrument panel cluster (IPC) to display the SERVICE SUSPENSION SYSTEM message.
Conditions for Clearing the MIL/DTC
* The scan tool can be used to clear the DTC.
* The DTC is saved as HISTORY when the ALC sensor no longer senses the hardware fault and the ignition is cycled OFF and ON.
Test Description
The number below refers to the step number on the diagnostic table.
2. This step checks to see if the problem has cleared after the ALC sensor has been calibrated.
