C0179

DTC C0179

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor
DTC C0179 54
- System Thermal Temperature High

Circuit/System Description

The electronic brake control module (EBCM) monitors traction control system (TCS) activation in order to calculate an estimate of the EBCM solenoid valve temperatures. In most cases high solenoid valve temperatures are caused by extended TCS activation. If the EBCM calculates that the solenoid valve temperatures are too high, the EBCM will temporarily suspend the traction control system function until the solenoid valves cool.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

The estimated solenoid coil temperature reaches 220°C (428°F).

Action Taken When the DTC Sets

* The EBCM disables the TCS for the duration of the ignition cycle.
* The driver information center displays the SERVICE TRACTION message.
* The driver information center displays the electronic stability control is inhibited.

Conditions for Clearing the DTC

The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids

Most occurrences of this DTC are caused by excessive traction control system activation or braking.

Reference Information
Schematic Reference

Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems
Connector End View Reference

Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)
Description and Operation

ABS Description and Operation (With JL4) ABS (With JL4)ABS Description and Operation (Without JL4) ABS (Without JL4)
Electrical Information Reference

* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

Important: Allow brakes to cool down before performing test.


1. With a scan tool clear the DTC.
2. Test drive the vehicle under normal braking conditions and without causing traction control system or ABS activation. Verify DTC C0179 does not reset.

• If the DTC resets, replace the EBCM.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

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