Vehicle Stability Enhancement System Inoperative
Vehicle Stability Enhancement System Inoperative
Circuit Description
The Vehicle Stability Enhancement System (VSES) is activated by the electronic brake control module (EBCM) calculating the desired yaw rate and comparing it to the actual yaw rate input. The desired yaw rate is calculated from measured steering wheel position, vehicle speed, and lateral acceleration. The difference between the desired yaw rate and actual yaw rate is the yaw rate error, which is a measurement of oversteer or understeer. If the yaw rate error becomes too large, the EBCM will attempt to correct the vehicles yaw motion by applying differential braking to the left or right front wheel.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
3. Perform the Steering Position Sensor Test in order to verify if the steering wheel position sensor (SWPS) is operating properly.
4. Verify that the Lateral Accelerometer Signal parameter is within the valid range.
5. Verify that the Yaw Rate Signal parameter is within the valid range.
