Mercury Villager Nissan Quest 1997-2000

Crash Sensors


The crash sensors are located behind the radiator support, and behind the center console on 1994-95 vehicles. On 1996-00 vehicles, the crash sensor is part of the air bag diagnostic monitor. In the event of a head-on impact, the sensing mass inside the sensor breaks away from the bias magnet. The sensing mass rolls along a cylinder toward two electrical contacts. If the deceleration is sufficient, the sensing mass will bridge the contacts and complete the primary deployment circuit to the air bag module.

The mounting and orientation of the sensors is vital to system operation. The sensors should be inspected by a qualified individual after any impact where the sensors could have been damaged. If any structural damage is evident, the area must be repaired to its original condition, otherwise the sensor orientation could be compromised. If the sensors are damaged, they must be replaced.