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 C0179 00: System Thermal HighDTC C0179 54: System Thermal Temperature Hight
Circuit/System Description
The electronic brake control module (EBCM) monitors how often the traction control system (TCS) activates 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
| • | The ignition is ON. |
| • | 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 traction control off indicator illuminates. |
Conditions for Clearing the DTC
| • | After the solenoid valves have cooled the EBCM automatically re-enables TCS function. |
| • | The EBCM automatically clears a 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
Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for EBCM
Circuit/System Testing
Important: Allow the brakes to cool down before performing this test.
- With a scan tool, clear the DTC.
- With a scan tool connected, test drive the vehicle under normal braking conditions and without causing TCS or ABS activation. Verify DTC C0179 does not reset.
- Refer to Diagnostic Aids.
| ⇒ | If DTC C0179 resets, replace the EBCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for EBCM replacement, setup, and programming.
