For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using the 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.

### 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 into the EBCM.

#### 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)/Engine Traction System (ETS) are disabled.

• | The ABS/ETS indicators turn ON.

### Conditions for Clearing the DTC

The correct calibration must be programmed into the EBCM.

### Circuit/System Verification

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

⇒ | Reprogram the EBCM.

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

2. With ignition OFF, separate the EBCM from the brake pressure modulator valve (BPMV).

### Repair Instructions

Control Module References for EBCM replacement, setup, and programming

### Repair Verification

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.