Volvo Workshop Manuals
V90 L6-2.9L VIN 96 B6304S (1998)
Powertrain Management > Computers and Control Systems > Sensors and Switches - Computers and Control Systems > Vertical Acceleration Sensor > Component Information > Locations > Page 1880
Vertical Acceleration Sensor: Description and Operation
The device consists of a piezo-electric vibration pick-up which detects vertical acceleration of the car, on a bumpy road for example. These irregularities
The engine control module (ECM) uses accelerometer signals to differentiate irregularities from real misfiring.
The accelerometer is supplied with 5 Volts from the ECM. Its output signal is approx. 2.5 Volts for a stationary car. When there is vertical movement
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