C0252

DTC C0252

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 C0252 00
- Vehicle Stability Control Module Sensors Correlation Malfunction

Circuit/System Description

The yaw rate, lateral acceleration and longitudinal acceleration sensors are combined into one multi-axis acceleration sensor, external to the electronic brake control module (EBCM). The EBCM controls the stability control by monitoring the inputs of the yaw rate sensor, lateral acceleration sensor, and steering angle sensor. The readings are compared to an internal calibrated value so it knows if the vehicle is having an instability condition to activate the stability control.

Conditions for Running the DTC

Vehicle is travelling.

Conditions for Setting the DTC

The yaw rate sensor, lateral acceleration sensor and steering angle sensor signals are not plausible to each other. Straight line driving can not be recognized after a distance of 2.5 km (1.5 mi).

Action Taken When the DTC Sets

* The EBCM disables the stability control and hill start assist for the duration of the ignition cycle.
* The traction control/stability control-active indicator turns ON.

Conditions for Clearing the DTC

* A current DTC clears when the diagnostic runs and passes.
* The EBCM will turn OFF the indicator in the next ignition cycle.

Diagnostic Aids

The following conditions can cause this concern:

* The vehicle should not pull in either direction while driving straight on a level surface.
* An improperly mounted or loose multi-axis acceleration sensor.

Reference Information
Schematic Reference

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

Component Connector End Views (Connector Views)
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)

Circuit/System Testing

1. Verify that DTC C0187, C0196, C019B, C0297, or C0710 is not present.

• If any of the listed DTCs is present, refer to Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code (DTC) List - Vehicle).

2. Replace the B119 Multi-axis Acceleration Sensor and verify the DTC does not reset.

• If the DTC resets, replace the B99 Steering Wheel Angle Sensor and verify the DTC does not reset.

3. If the DTC resets, replace the K17 Electronic Brake Control Module (EBCM).

Repair Instructions

* Perform the Diagnostic Repair Verification (Verification Tests)
* Vehicle Yaw Sensor with Vehicle Lateral and Longitudinal Accelerometer Replacement (Service and Repair)
* Steering Angle Sensor Replacement (Removal and Replacement)
* Control Module References (Programming and Relearning)for EBCM replacement, setup and programming