Seat Belt Retractor Limit Switch: Description and Operation

Front and rear limit switches are mounted on the track and motor assemblies. These switches act as inputs for the control module and trigger the disengagement of the system.

When a door is closed and the ignition switch is in the ON position, the door catch switch sends a sinal to the passive restraint control module to operate the motor. The carrier then slides up the track until it reaches the rear limit switch, which cuts the current to stop the operation of the motor.

When a door is opened, the door catch switch sends a signal to the passive restraint control module to operate the motor regardless of what position the ignition switch is in. The carrier then slides down the track until it reaches the front limit switch, which cuts the current to stop operation of the motor.