For 1990-2009 cars only
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 00: Electronic Control Unit (ECU) PerformanceDTC C0550 04: Electronic Control Unit (ECU) Performance Open Circuit
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 EBCM disables the antilock brake system (ABS). |
| • | The EBCM disables or degrades the dynamic rear proportioning (DRP) function. |
| • | The ABS indicator illuminates. |
| • | The vehicle dynamics caution (VDC) indicator illuminates. |
| • | The brake warning indicator illuminates. |
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for Scan Tool Information
Circuit/System Verification
Verify DTC C0550 is set as a current DTC.
| ⇒ | If DTC C0550 is current, verify the EBCM power circuits and ground circuits for proper connections. If all circuits test normal, replace the EBCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for EBCM replacement, setup, and programming
