Antilock Brake System

DTC C0550

Diagnostic Instructions

* 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.



DTC Descriptor
DTC C0550
- Electronic Control Unit (ECU) Performance




Circuit/System Description

The electronic brake control module (EBCM) detects an internal malfunction.


Conditions for Running the DTC

The ignition is ON.


Conditions for Setting the DTC

An internal EBCM malfunction exists.


Action Taken When the DTC Sets

One or more of the following actions may occur:

* The antilock brake system (ABS)/dynamic rear proportion (DRP) are disabled.
* The ABS/TCS/VSES indicators turns ON.
* The red brake warning indicator turns ON.



Conditions for Clearing the DTC

* The condition for the DTC is no longer present.
* The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.



Reference Information
Schematic Reference

Antilock Brake System Schematics ([1][2]Antilock Brakes / Traction Control Systems)
Connector End View Reference

Component Connector End Views
Description and Operation Reference

ABS Description and Operation (Description and Operation)
Electrical Information Reference

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

Scan Tool Reference

Control Module References for scan tool information


Circuit/System Verification

Verify that DTC C0550 is not set.

If the DTC is set, replace the EBCM.



Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


Control Module References for EBCM replacement, setup, and programming