Sunroof / Moonroof: Description and Operation

The Astro Roof Control Module determines motor direction based on inputs received from the Astro Roof Switch. Voltage is applied to module terminal C1/C, allowing Astro Roof operation whenever the Ignition Switch is at RUN or when retained accessory power (RAP) is available.

Express Open

When the Astro Roof Control Module's reverse/close vent input (terminal C2/6) is grounded through the Astro Roof Switch, the Module goes into the express open mode. When the Module is in the express open mode, voltage is applied to the Astro Roof Motor Assembly from terminal C1/A of the Module. The Astro Roof Motor's ground is through terminal C1/B of the Module.

The Astro Roof Motor runs until one of three conditions occurs: 1) the motor stalls when the Astro Roof reaches its fully open position: 2) the Astro Roof Switch is pushed to the forward/vent position; or 3) the Astro Roof Switch is released from the reverse/close vent position and then pressed again.

Vent

The Astro Roof moves to the vent position when the Astro Roof Control Module's forward/ vent input (terminal C2/7) is grounded and the Astro Roof is in the flush closed position.

Closing

When the Astro Roof Control Module's forward/vent input (terminal C2/7) is grounded through the Astro Roof Switch, the module applies voltage to the Astro Roof Motor Assembly from terminals C1B. The motor's ground is through module terminal C1/A.

The Astro Roof Control Module runs the motor until the Astro Roof Switch is released, or the limit switch closes to ground the modules limit switch input (terminal C2/8). The limit switch closes when the sunroof is in the flush closed position.

Express Close Vent

The Astro Roof moves to the flush closed position when the Astro Roof Control Module's reverse/close vent input (terminal C2/6) is grounded, and the Astro Roof is in the vent position. The module stops motor operation under the same conditions as outlined in express open.