Sunroof / Moonroof: Description and Operation

How the Circuit Works
The moonroof is controlled by the moonroof control unit, moonroof switch, and MICU. The moonroof control unit contains the moonroof close relay, moonroof open relay, moonroof motor, the hall sensor, and the CPU.

System Operation
Battery voltage is supplied at all times through fuse 24 (in the under-dash fuse/relay box) to the moonroof open and close relays. With the ignition switch in ON (II) or START (III), battery voltage is supplied through fuse 1 (in the under-dash fuse/relay box) to the moonroof control unit. The CPU uses input from the moonroof switch in order to provide ground for the relays. When one of the relays is energized, battery voltage is provided to the moonroof motor. In this condition, the other relay provides a path to ground for the moonroof motor. The CPU and relays are grounded at G501.

The moonroof has a key-off delay, which allows the moonroof to be operated for up to 10 minutes after the ignition is turned off. Opening one of the front doors cancels the key-off delay.