Description & Operation

WARNING: Vehicles are equipped with side impact air bags located in seat backs. During front seat service, always install Transport Safety Device (9156562-2) on seat firing mechanism. Transport safety device is attached to inside of seat. Never apply external force to side of seat, as air bag could deploy. See AIR BAG RESTRAINT SYSTEMS article.

Power driver's and passenger's seats are available as a factory option. Memory function has 3 memory buttons for different seat settings. Control module, located under seat, operates 4 separate motors. Three motors are located under the seat and the fourth is located in the seat back. See Fig 1 . Control module takes information on seat position from signals from 4 position sensors. Sensors are potentiometers driven by worm gears on output shaft of each motor. Power seat system includes an integral self-diagnostic system.

If a control button is pressed for more than 60 seconds, a timer circuit cuts off power supply to motors by disabling main relay. Seat positions are held in an EEPROM which retains information indefinitely in case of power failure.

Fig 1: Locating Power Seat Components

Courtesy of VOLVO CARS OF NORTH AMERICA