B0010

DTC B0010
DTC Descriptor
DTC B0010
Reverse Gear Signal Circuit

Diagnostic Fault Information

Important: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Diagnostic System Check - Vehicle





Circuit/System Description
The electronic brake module (EBCM) receives a 12-volt signal from the backup lamp supply voltage circuit when the vehicle transmission is in reverse. The EBCM uses the backup lamp supply voltage circuit to perform traction control and vehicle stability in reverse.

Conditions for Running the DTC
^ The ignition is ON.
^ The vehicle speed is greater than 15 km/h (9 mph) for 2 seconds continuously.
^ The vehicle is equipped with a manual transmission.

Conditions for Setting the DTC
The EBCM detects an open in the backup lamp supply voltage circuit.

Action Taken When the DTC Sets
^ The EBCM disables the Traction Control System (TCS)/Vehicle Stability Enhancement System (VSES) for the duration of the ignition cycle.
^ Driver information center (DIC) displays the TRACTION FAILED message.
^ DIC displays the SERVICE STAB SYS message.
^ Stability Caution indicator turns on.

Conditions for Clearing the DTC
The DTC clears automatically from current status when the fault is corrected and the ignition is cycled. Use a scan tool to clear the DTC from history status.

Diagnostic Aids
B0010 sets if all of the reverse lamp bulbs are open.

Reference Information
Schematic Reference
^ ABS Schematics
^ Exterior Lights Schematics

Connector End View Reference
^ ABS Connector End Views
^ Computer/Integrating Systems Connector End Views

Electrical Information Reference
^ Circuit Testing
^ Connector Repairs
^ Testing for Intermittent Conditions and Poor Connections
^ Wiring Repairs

Scan Tool Reference
Scan Tool Data List

Circuit/System Testing
1. Turn ON the ignition with the engine OFF. Place the gear selector of the transmission in reverse. The reverse lamps should illuminate.
^ If the reverse lamps do not illuminate, go to Diagnostic Aids or Symptoms - Lighting Systems. Component Tests and General Diagnostics Symptoms (Lighting Systems)

2. Turn the ignition OFF, Disconnect the EBCM harness connector. Connect a test lamp between the backup lamp supply voltage circuit of the harness connector and ground. Turn the ignition ON and place the gear selector of the transmission in reverse.
^ If the test lamp does not illuminate, repair open in the backup lamp supply voltage circuit between the splice and the EBCM connector.
^ If the test lamp illuminates, replace the EBCM/brake pressure modulator valve (BPMV) assembly.

Repair Instructions

Important: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

^ Control Module References for EBCM and BPMV replacement, setup, and programming.
^ Symptoms - Lighting Systems Symptoms (Lighting Systems)