Checking the seat belt tensioner

Fig 1: Checking Seat Belt Tensioner

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Insert a wire in the pipe on the seat belt tensioner. This is to check the position of the piston.

Position A: 

the seat belt tensioner has deployed.

• Replace both the seat belt tensioners.

Position B: 

the seat belt tensioner has not deployed.