Front Sub Sensor

The front sub sensor is installed to the tip of the front side frame.

If it detects an impact exceeding the specified level from the front, it sends a signal which is used for airbag system deployment judgment to the airbag control module.

To judge the impact to the front of the vehicle more precisely, the sensor is changed from the conventional pendulum type mechanical sensor to an electronic sensor.

Fig 1: ABS Front Sub Sensor Block Diagram

Courtesy of SUBARU OF AMERICA, INC.