Position Encoding System (PES)

The Position Encoding System (PES) module tracks the position of the glass through the limit switches and detects the limits of travel to the following positions:
^ Full vent position
^ Full open position

The sunroof control module monitors the limit switches. As a limit switch closes, the sunroof limit switch circuit 5-volt reference is shorted to the sunroof limit switch low reference circuit, pulling the reference voltage to 0 volts. The sunroof control module detects 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 under the following conditions:
^ When the glass has reached the full vent position
^ When the glass has reached the full open position
^ When the glass has reached the closed position