Acceleration/Deceleration Sensor: Description and Operation

G SENSOR





The G sensor senses deceleration during braking to determine whether the vehicle is being driven on a high traction road (asphalt road, etc.) or a low traction road (snow-covered road, etc.). It then sends a signal to the ABS control unit.
The reed switch turns on when it is affected by a magnetic field. During sudden deceleration (braking on a high traction road), the weight moves and the magnet in the weight moves away from the reed switch. The magnetic field then diminishes and the reed switch turns off.