Power Sunroof Inoperative

WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

17. Disconnecting the connector to the Position Encoding System (PES) (limit switches) and shorting the sunroof limit switch vent signal circuit to the sunroof limit switch low reference circuit, will simulate that the glass is in a position other than closed or full open position. This will allow any request from the sunroof switch to supply an output to drive the sunroof motor.
18. Checking the sunroof motor open and close output circuits, when idle both should be at ground potential.

Fig 1: Power Sunroof Inoperative (1 Of 5)
Courtesy of GENERAL MOTORS CORP.

Fig 2: Power Sunroof Inoperative (2 Of 5)
Courtesy of GENERAL MOTORS CORP.

Fig 3: Power Sunroof Inoperative (3 Of 5)
Courtesy of GENERAL MOTORS CORP.

Fig 4: Power Sunroof Inoperative (4 Of 5)
Courtesy of GENERAL MOTORS CORP.

Fig 5: Power Sunroof Inoperative (5 Of 5)
Courtesy of GENERAL MOTORS CORP.