For 1990-2009 cars

### 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 Descriptors

DTC C0551 45: Option Configuration Error/Variant Not Programmed
DTC C0551 47: Option Configuration Error/VIN Not Programmed

### Circuit/System Description

When the electronic brake control module (EBCM) is replaced, software and calibrations are flash programmed into the EBCM. The EBCM receives the VIN number from the BCM in order for the EBCM to automatically calibrate to the vehicle.

### Conditions for Running the DTC

The ignition switch is in the ON position.

### Conditions for Setting the DTC

#### C0551 45

The option configuration has not been programmed.

#### C0551 47

The incorrect EBCM has been installed in the vehicle.

### Action Taken When the DTC Sets

One or more of the following actions may occur:

• | The antilock brake system (ABS) and engine traction (ETS) are disabled.

• | The ABS/TCS indicators turn ON.

### Conditions for Clearing the DTC

• | The condition for the DTC is no longer present.

• | The correct calibration must be programmed into the EBCM

### 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

Verify that the EBCM is the correct module for the vehicle.

⇒ | If the EBCM is not correct, replace the EBCM.

⇒ | Reprogram the EBCM.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Electronic Brake Control Module Replacement

• | Control Module References for EBCM replacement, setup, and programming