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 vehicle's yaw motion by applying differential braking to the left or right front wheel.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Does the distance measure within the specified range? | 2.5-3.3 cm (1.0-1.3 in ) | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Recalibrate the brake pedal position (BPP) sensor. Refer to Brake Pedal Position Sensor Calibration in Lighting Systems. Did this correct the condition? | -- | Go to Step 5 | Go to Step 4 |
4 | Replace the BPP sensor. Refer to Brake Pedal Position Sensor Replacement in Lighting Systems. Did you complete the replacement? | -- | Go to Step 5 | -- |
5 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
