Power Sunroof Operates Erratically

POWER SUNROOF OPERATES ERRATICALLY

DIAGNOSTIC AIDS
- The symptoms listed directly below are considered to be erratic and can usually be attributed to a failure of one of the sunroof switch data signal circuits. The failure may occur to the hard wire, external part of the circuit, or it may occur to the part of the circuit that is within the related component, i.e. sunroof switch or sunroof motor/actuator. If the failure is within the related component, the component must be replaced.
- Power sunroof and power sunshade operate only to certain positions
- Power sunroof and power sunshade open or close to the wrong position
- The power sunroof is opened and closed by using the power sunroof switch. When the sunroof opens, the power sunshade opens with it. The sunshade also closes when the sunroof closes, however, the sunshade will only close to the first closed position. From this position, the closing of the sunshade must be completed by using the sunshade switch. The power sunroof motor/actuator monitors the positions of the both the sunroof and the sunshade and limits the opening of the sunroof and the closing of the sunshade based upon the current positions of the sunroof and the sunshade. The power sunroof motor/actuator will not allow the sunroof glass to be opened more than the sunshade panel.
- If a power sunroof switch data signal circuit shorts to voltage, it is likely that the circuit will open permanently inside the switch. If you are replacing the switch due to an open internal circuit, be sure to test the corresponding external circuit for a short to battery.
- The power sunroof motor/actuator assembly contains the sunroof electronic control module. The individual components are not serviced separately.
- The power sunshade motor/actuator assembly contains the sunshade electronic control module. The individual components are not serviced separately.
- The power sunroof motor/actuator is also known as the power sunroof master control module.
- The power sunshade motor/actuator is also known as the power sunroof slave module.

IMPORTANT: If the power sunroof and power sunshade both operate normally from the power sunroof switch, but the power sunshade is inoperative from the power sunshade switch, refer to Power Sunshade Inoperative. Power Sunshade Inoperative

TEST DESCRIPTION

Step 1 - Step 7:

Step 8 - Step 14:

Step 15 - Step 18:

The numbers below refer to the step numbers on the diagnostic table.
3. This step verifies that you are using the correct table for the symptom.
6. This step, along with steps 7, 8, 9, 10, and 11, tests the internal circuitry of the power sunroof switch. The power sunroof switch test table may be used in conjunction with these steps to assist in your diagnosis. Refer to Power Sunroof Switch Test. Power Sunroof Switch Test