Acceleration/Deceleration Sensor: Description and Operation

PURPOSE
The G-switch detects and indicates to the anti-lock brake control module whether or not the vehicle is moving.


OPERATION
The G-switch is used on 4x4 vehicles only. When driven in the 4-wheel drive mode all four wheels are mechanically linked and a situation could arise in which one wheel locks up and causes all four wheels to lock up and skid. The speed sensors would indicate the vehicle speed as zero. Without the G-switch, the anti-lock brake control module (2B373) would have no data to compare and would react as if the vehicle were stopped when in fact it is moving.