C0550

DTC C0550

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Diagnostic Procedure Instructions for an overview of the diagnostic approach.
* Strategy Based Diagnosis 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 switch is in the ON position.

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/ESC indicators turn ON.
* The red BRAKE Warning indicator turns ON.

Conditions for Clearing the DTC

* The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
* 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

Connector End View Reference

Antilock Brake System Connector End Views

Description and Operation

ABS Description and Operation

Electrical Information Reference

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

Scan Tool Reference

Scan Tool Data List for EBCM

Circuit/System Verification

DTC C0550 will set as result of internal (EBCM) circuit failure.

Verify that the DTC will not clear with a scan tool.

Replace the EBCM.

Repair Instructions

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

Refer To Programing and Relearning Programming and Relearning

Repair Verification

Diagnostic Repair Verification