Acceleration/Accelerometer Sensor

On C70, S70 and V70, acceleration/accelerometer sensor is mounted under the right front of vehicle, on the subframe. On S90 and V90, acceleration/accelerometer is mounted on brace in left rear engine compartment. Sensor consists of a piezoelectric vibration pick-up that detects vertical acceleration of vehicle, for example driving on a bumpy road. ECM uses this sensor signal to determine if irregularities in crankshaft rotation are due to cylinder misfiring or due to driving on an uneven road surface.