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 00
- Stability System Active Too Long

Circuit/System Description

The electronic brake control module (EBCM) detects a malfunction when vehicle stability enhancement system (VSES) brake intervention is active for more than an excessive amount of time.

Conditions for Running the DTC

* Ignition is ON.
* The ignition voltage is above 10 volts.

Conditions for Setting the DTC

The EBCM detects VSES is active for more than 15 seconds.

Action Taken When the DTC Sets

* The VSES functionality is disabled
* A driver information center message and/or a warning indicator may be displayed.

Conditions for Clearing the DTC

* The condition for the DTC is no longer present.
* The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids

For non-SS models, an improperly centered steering angle sensor may cause this DTC to set with a known good yaw/lateral accelerometer sensor. Test drive the vehicle while observing the scan tool Steering Wheel Position parameter to ensure that the steering angle is 0° when driving the vehicle in a straight line. If the parameter reads 0°, the automatic offset learning may have adjusted up to 15° without setting another DTC. Perform the scan tool, Steering Pos. Sensor Calibration procedure.

Reference Information
Schematic Reference

Antilock Brake System Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
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 (Programming and Relearning)for scan tool information

Circuit/System Verification

Note: Verify the EBCM/VSES, Yaw Rate Sensor Input is 0.0° per second data for a stationary vehicle parked on a level surface. If greater than 2.0° per second or less than -2.0° per second this may indicate a failure in the yaw/lateral accelerometer sensor.

1. Verify that DTC C0460 is not set as current.

• If the DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code (DTC) List - Vehicle).

2. Verify that DTC C0280 is not set as current.

• If the DTC is set, clear the DTC with a scan tool, and operate the vehicle within the conditions for setting the DTC. If the DTC resets, replace the yaw/lateral accelerometer sensor.

Repair Instructions

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

Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (Service and Repair)