BCM-0091

BCM-0091: Accelerometer, Faulty Signal
Condition





Note! The Diagnostic Trouble Code (DTC) applies only to cars with Dynamic Stability And Traction Control (DSTC).

The yaw rate sensor, lateral accelerometer, accelerometer and angle of lean sensor (only RSC) are integrated in the active yaw control sensor for Dynamic Stability And Traction Control (DSTC). The sensors transmit information to the Brake Control Module (BCM) indicating the size of the yaw angle, the lateral acceleration of the car, the forward acceleration and the lateral angle of lean via the Control Area Network (CAN).
Diagnostic Trouble Code (DTC) BCM-0090, BCM-0091, BCM-0092 or BCM-0093 is stored, depending on the sensor, if the control module registers a faulty signal from any of the sensors.
- BCM-0090: Lateral accelerometer
- BCM-0091: Accelerometer
- BCM-0092: Yaw rate sensor
- BCM-0093: Angle of lean sensor.

The Diagnostic Trouble Code (DTC) can be diagnosed while the ignition is switched on.

Substitute value
- Traction control is blocked
- Stability control is blocked
- Active yaw control is blocked
- RSC system is blocked (cars equipped with RSC only).

Hint: For information about brake system abbreviations, Refer to Description and Operation.

Possible source
- Open-circuit or short-circuit to ground in the wiring for the active yaw control sensor
- Internal fault in the active yaw control sensor.

Fault symptom[s]
- The anti-spin warning lamp is lit (up to and including 2002 model year)
- General yellow warning lamp lit (from model year 2003)
- Anti-spin does not function
- The stability control system does not function
- The traction control system does not function.