Antilock Brake System
DTC C0550
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 C0550 00
- 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
* The EBCM disables the antilock brake system (ABS).
* The EBCM disables or degrades the dynamic rear proportioning (DRP) function.
* A DIC message and/or a warning indicator may be displayed.
Conditions for Clearing the DTC
* The condition for setting the DTC is no longer present.
* The EBCM automatically clears a history DTC when a current DTC is not detected in 40 consecutive drive cycles.
Reference Information
Schematic Reference
Antilock Brake System Schematics (JL7) (Antilock Brake System Schematics (JL7))Antilock Brake System Schematics (Except JL7) (Antilock Brake System Schematics (Except JL7))
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
ABS Description and Operation (With JL7) (ABS (With JL7))ABS Description and Operation (Without JL7) (ABS (Without JL7))
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 DTC C0550 is not set.
If DTC C0550 is set, replace the EBCM.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
Control Module References (Programming and Relearning) for EBCM replacement, setup, and programming