Acceleration Sensor : Signal implausible
Check the mounting of the yaw rate sensor/central ECU. Perform standstill calibration. Check whether wheelbase and wheeltrack correspond to the vehicle specification and are correct programmed in the dataset, if necessary. Check calibration of vehicle speed. Check if sensor is calibrated correctly: with engine running, set steered wheels in straight position, read steering angle via diagnosis, check if the value of steering angle is 0 +- 10 degrees. If value is not OK, recalibrate the sensor. While engine still running, mark zero position on the steering wheel and turn it in both directions by one turn (360 degrees). Check the steering angle values via diagnosis (+-360 degrees). If values are not OK, check the mounting and the drive of the sensor. If fault is still active check steering system for specified parts (e.g. steering lever). With engine running turn the steering wheel to its end positions, read the steering angle values via diagnosis and check if the read values are within the allowed range defined in the dataset. If fault is still active, replace the yaw rate sensor/central ECU.
What you'll see
No driver-visible symptom recorded.
System reaction
ESP control off. ESP Warning Lamp.
Diagnostic depth
The failure is reported if yaw rate sensor signal is implausible compared to the other ESP sensor signals and the reference yaw rate.
Yaw rate sensor is calibrated incorrectly or incorrect mounting of the yaw rate sensor/central ECU or internal failure of the yaw rate sensor/central ECU; Steering angle sensor or steering system does not correspond to the vehicle specification (wrong steering gearbox or steering gear arm) or heelbase or wheeltrack do not correspond to the vehicle specification or calibrated vehicle speed does not correspond to the wheel speeds or steering system damaged or internal failure of the steering angle sensor.