For 1990-2009 cars only
DTC Descriptor
DTC C0550: Electronic Control Unit (ECU) PerformanceDiagnostic Fault Information
Important: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
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 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. |
Circuit/System Verification
DTC C0550 will set as result of internal (EBCM) circuit failure.
| ⇒ | Replace the EBCM. |
Repair Instructions
Important: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for EBCM
Repair Verification
