Automatic Level Control

DTC C0550

DTC Descriptor

DTC C0550: 31, 32, 38, 39
Electronic Control Unit (ECU) Performance

Diagnostic Fault Information

Important: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Testing and Inspection

Circuit/System Description
The automatic level control (ALC) sensor detects an internal malfunction.

Conditions for Running the DTC
The ignition switch is in the ON position.

Conditions for Setting the DTC
An internal ALC sensor malfunction exists.

Action Taken When the DTC Sets
One or more of the following actions may occur:
^ The ALC system is disabled.
^ The SERVICE SUSPENSION SYS message is displayed.

Conditions for Clearing the MIL/DTC
^ The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
^ The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Circuit/System Verification
DTC C0550 will set as result of internal ALC sensor circuit failure.
^ Replace the ALC sensor.

Repair Instructions

Important: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

Control Module References - Automatic Level Control Sensor