Diagnostic Instructions
DTC Descriptor
DTC C0179 00: System Thermal 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 TCS function until the solenoid valves cool.
Conditions for Running the DTC
| • | Ignition voltage is greater than 8 volts. |
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 (DIC) displays the SERVICE TRACTION message. |
| • | The DIC displays the Vehicle Stability Enhancement System (VSES) inhibited. |
Conditions for Clearing the DTC
| • | After the solenoid valves have cooled the EBCM automatically re-enables TCS function. |
| • | The EBCM automatically 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 TCS activation or braking.
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Antilock Brake System Connector End Views
Electrical Information Reference
Scan Tool Reference
Scan Tool Data List
for EBCM
Circuit/System Testing
Important: Allow brakes to cool down before performing test.
- With scan tool clear the DTC.
- With scan tool connected test drive the vehicle under normal braking conditions and without causing TC or ABS activation. Verify DTC C0179 resets.
| ⇒ | If the DTC resets replace the EBCM. |
- Refer to Diagnostic Aids.
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
