Motor Communications Check

Sunroof and sunshade operation must be synchronized. The two motor and module units share a communication circuit. This communication circuit is not connected to any other communications circuits in the vehicle. When the sunroof and sunshade communications is active and functioning properly, the express (also known as one-touch) mode of operation for both units is enabled. When the motor and module units cannot communicate, express mode is disabled for both units and only the manual mode of operation is enabled.

To test for proper motor communications, first verify that the system voltage of the vehicle is at or above 12.5 volts. Turn the ignition switch to the ON or ACCESSORY position and try to operate the sunroof and sunshade with their respective switches, carefully noting the results. Proceed as follows.

• Both the sunroof and the sunshade operate only in manual mode. Check the communications circuit between the two motor and module units for a short or open circuit. Refer to the appropriate wiring information. Repair the communications circuit if required. If the communications circuit checks okay, one or both motor and module units may have an internal communications failure and may need to be replaced.
• The sunroof moves in manual mode, but the sunshade does not move. Check the ground, fused B(+), fused ignition (run - acc) and switch circuits at the sunshade motor. If the circuits check okay, replace the ineffective sunshade motor and module unit.
• The sunshade moves in manual mode, but the sunroof does not move. Check the ground, fused B(+), fused ignition (run - acc) and switch circuits at the sunroof motor. If the circuits check okay, replace the ineffective sunroof motor and module unit.