Diagnostic Instructions
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 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
Connector End View Reference
Antilock Brake System Connector End Views
Description and Operation
ABS Description and Operation
Electrical Information Reference
Scan Tool Reference
Scan Tool Data List
for EBCM
Circuit/System Verification
Verify that the following DTCs are not set: C0186, C0196, C0253, C0710
