Automatic Level Control

DTC C0558

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.

DTC Descriptor
DTC C0558 00
- Calibration Data Not Programmed

Circuit/System Description

The automatic level control (ALC) module performs checks of internal calibration data. If a fault condition is detected, the ALC module 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.

Conditions for Running the DTC

* Battery voltage is between 9-16 volts
* Ignition is ON.

Conditions for Setting the DTC

* The DTC is set when any calibration faults internal to the ALC module 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

* The ALC module disables all ALC functionality.
* The ALC module sends a message to the instrument panel cluster (IPC) to display the SERVICE SUSPENSION SYSTEM message.

Conditions for Clearing the DTC

A history DTC will clear when the ALC no longer senses the malfunction and the ignition is cycled ON and OFF.

Reference Information
Schematic Reference

Automatic Level Control Schematics (Automatic Level Control)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Automatic Level Control Description and Operation (Automatic Level Control)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

Verify that DTC C0558 is not set.

If the DTC is set, perform the Suspension Position Calibration (Procedures) procedure. If the DTC resets replace the ALC sensor/module.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

Control Module References (Programming and Relearning) for automatic level control sensor/module replacement, setup, and programming