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 Descriptor

DTC C0268: Class 2 Data Error Reported

### Circuit/System Description

The electronic brake control module (EBCM) disables the traction control when other electronic control modules set DTCs for components that affect the operation of the traction control system.

### Conditions for Running the DTC

The ignition switch is in the ON position.

### Conditions for Setting the DTC

The PCM or BCM diagnoses a condition preventing the engine control portion of the traction control function and sends a serial data message to the EBCM indicating that torque reduction is not allowed. The PCM or BCM and transmission will typically set a DTC and the EBCM will set this DTC.

### Action Taken When the DTC Sets

One or more of the following actions may occur:

• | The EBCM disables the Antilock Brake System (ABS)/Traction Control System (TCS)/Vehicle Stability Enhancement System (VSES) for the duration of the ignition cycle.

• | DRP may be disabled and the Brake Warning indicator may turn ON.

• | Stability Caution indicator turns ON.

• | DIC displays the SERVICE STAB SYS message.

• | DIC displays the TRACTION FAILED message.

### Conditions for Clearing the MIL/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.

### Reference Information

#### Schematic Reference

Antilock Brake System Schematics

#### Connector End View Reference

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

### Circuit/System Verification

Verity that no DTCs are set in the BCM, and PCM or transmission. If DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for EBCM replacement, setup, and programming