C0280

DTC C0280

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 C0280 54
- Stability System Active Too Long High Temperature

Circuit/System Description

The solenoid valves are integral parts of the brake pressure modulator. The modulator contains an isolation solenoid valve and a dump solenoid valve for each wheel along with a traction/stability control supply solenoid valve and isolation solenoid valve for each brake circuit. The solenoid valves are not engaged during normal system operation. When the ABS, traction control or stability control operation is required the electronic brake control module turns the required solenoid valves ON. The electronic brake control module detects an over temperature condition with one or more of the solenoids due to an extended ABS, traction control or stability control event lasting more than fifteen seconds.

Conditions for Running the DTC

Ignition ON

Conditions for Setting the DTC

Stability control is active for more than 15 seconds.

Action Taken When the DTC Sets

* The ABS indicator turns ON.

* The traction/stability control indicator turns ON, if equipped with electronic stability control.

* The electronic brake control module disables the ABS, the traction control system and the electronic stability control system for the duration of the ignition cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

Diagnostic Aids

This DTC may set due to extended operation of the ABS, the traction control or the stability control.

Reference Information

Schematic Reference

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

Connector End View Reference

Component Connector End Views Outside Rearview Mirror - Driver

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 Testing

Note: Since most occurrences of this DTC are caused by excessive ABS, traction control or stability control usage, review with the customer the conditions under which the DTC set.

1. Ignition ON.

2. Verify that DTC C0186, C018B, C0196, C019B, C0287, or C0710 is not set.

• If any of the DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.

• If none of the DTCs are set

3. Ignition OFF, allow the Q5 Brake Pressure Modulator to cool down to ambient temperature, ignition ON.

4. Verify that DTC C0280 54 does not set while driving the vehicle under normal braking conditions.

• If the DTC is set
Replace the K17 Electronic Brake Control Module.

• If the DTC is not set

5. 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