C027C

DTC C027C

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 C027C 54
- Front Brake Discs High Temperature

Circuit/System Description

The Electronic Brake Control Module monitors how often the traction control system activates in order to calculate an estimate of the front brake discs temperature. In most cases the high temperatures are caused by extended traction control activation. If the Electronic Brake Control Module calculates that the front brake components temperatures are too high, the Electronic Brake Control Module will temporarily suspend the traction control system function until the front brake discs cool down.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

The Electronic Brake Control Module detects the calculated temperature of the brake components is higher than 500°C (932°F).

Action Taken When the DTC Sets

* The Traction/stability Control Indicator turns ON.

* The Electronic Brake Control Module disables the traction/stability control system.

Conditions for Clearing the DTC

* The condition for setting the DTC is no longer present.

* The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Diagnostic Aids

DTC C027C does not indicate a malfunction has occurred. This DTC indicates there was excessive ABS or traction control activation that may cause high temperatures.

Reference Information

Schematic Reference

Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly

Description and Operation

ABS Description and Operation Description and Operation

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

Note: Since most occurrences of this DTC are caused by excessive brake usage, review with the customer the conditions under which the DTC set.

1. Allow the brakes to cool down before performing test.

2. Perform a complete brake inspection.

3. Verify DTC C027C does not set while driving the vehicle under normal braking conditions.

• If the DTC sets
Replace the K17 Electronic Brake Control Module.

• If the DTC does not set

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

Control Module References Control Module References for Electronic Brake Control Module replacement, programming and setup