C0252

DTC C0252

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 C0252 00
- VSES Sensor Uncorrelated




Circuit/System Description

The vehicle stability enhancement system (VSES) is activated by the electronic brake control module (EBCM) and monitors the yaw rate/lateral accelerometer sensor, and steering wheel angle sensor inputs to ensure they correlate within their desired ranges.


Conditions for Running the DTC

* The steer angle has been centered.
* The VSES is active.
* The centered lateral acceleration value is less than 0.5 g.
* The yaw rate error is less than 6 degrees/second.



Conditions for Setting the DTC

One of the following conditions exists:

* The DTC sets when VSES is engaged for 10 seconds with the yaw rate error always in either understeer or oversteer.
* The yaw rate error is greater then 10 degrees/second for 5 seconds, and the yaw has not changed and the lateral acceleration is less than 0.5 g.



Action Taken When the DTC Sets

One or more of the following actions may occur:

* The EBCM disables the ABS/TCS/VSES for the duration of the ignition cycle.
* The ABS and VSES indicators illuminate.
* The driver information center (DIC) displays the Service Traction Control and Stabilitrak message.



Conditions for Clearing the DTC

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



Diagnostic Aids

The following conditions can cause this concern:

* Improper steering alignment
* An internal lateral accelerometer failure



Reference Information
Schematic Reference

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

Component Connector End Views
Description and Operation

ABS Description and Operation (With JL4) (ABS Description and Operation (With RPO JL4))ABS Description and Operation (Without JL4) (ABS Description and Operation (Without RPO JL4))
Electrical Information Reference

* Circuit Testing
* Connector Repairs
* Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs

Scan Tool Reference

Control Module References for Scan Tool Information


Circuit/System Verification

1. Perform the steering angle sensor calibration.
2. Clear the DTC with a scan tool, and operate the vehicle within the conditions for setting the DTC.
3. Verify DTCs : C0186, C0196, C0252, C0253, or C0710 are not set.

• If DTCs C0186, C0196, C0253, or C0710 are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle


• If only DTC C0252 set as current, replace the EBCM.