Limit Switches

The limit switches are part of the position encoding system (PES) that tracks the position of the glass through the limit switches and understands the limits (soft stops) of travel to the:

• Full vent position
• Full open position

The sunroof control module monitors the limit switches (PES). As a limit switch closes, the sunroof limit switch circuit 5 volt reference will be shorted to the sunroof limit switch low reference circuit, pulling the reference voltage to 0 volts. The sunroof control module understands the position of the sunroof glass based on the multiple input combinations through the limit switch inputs, which brings the sunroof glass to a soft stop when it reaches the full vent or full open positions and when it has reached the closed position.