Monitor Switches

The seat belt control unit monitors all the switches in the automatic shoulder belt system. How each switch in the system is "read" is explained in the following:

• Door Latch Switch The door latch switch has two positions. The control unit has two wires going to the switch. When the door is closed, one wire will be switched to body ground and the other will be opened. When the door is opened, the condition will reverse.
• Front Position Switch This switch provides a path to ground (the switch is closed) when the shoulder belt is not in the forward position. The switch is open when the shoulder belt is in the forward position (this creates an open in the circuit).
• Rear Lock Position Switch (anchor) This switch provides a path to ground (the switch is closed) when the shoulder belt is not in the rearward position. The switch is open when the belt is in the rearward position (this creates an open in the circuit).
• Rear Lock Position Switch (seat belt) This switch provides a path to ground (the switch is closed) when the shoulder belt is in the rearward position and buckled. The switch is open when the belt is not in the rear position or the shoulder belt is not buckled (this creates an open circuit).
• Lap Seat Belt Switch This switch provides a path to ground (the switch is closed) the lap belt is not buckled. The switch is open when the lap belt is buckled.
• Solenoid Sensor Switch This switch provides a path to ground (the switch is closed) when the solenoid is not energized. The switch is open when the solenoid is energized.