Sunroof Limit Switch/Sunroof Position Encoding System Switch

The sunroof limit switches/sunroof position encoding system switch tracks various positions of the sunroof glass through its travel between full vent to full open.

The sunroof module monitors the sunroof limit switches LS1, LS2 and LS3 inputs. As a sunroof 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 module understands the position of the sunroof glass based on the multiple input combinations to the limit switch inputs. The various inputs allow the sunroof module to bring the sunroof glass to a soft stop when it reaches the full vent, full open or closed positions.