DESCRIPTION & OPERATION
Sun roof has 2 modes of operation, sliding open and closed in one mode and raising up to vent and lowering to close from vent position. Sun roof express module determines operating mode. Sun roof is operated using single two pole rocker switch mounted in overhead console which provide sun roof control express module with two grounded inputs. Major components of system are drive motor, control module, glass panel and rail and track assembly. System also uses manually operated sunshade to cover opening inside vehicle.
With sun roof in fully closed position, pressing sun roof switch to CLOSE/VENT OPEN (forward) will raise sun roof to vent position. Motor will run until switch is released or full VENT position is reached. From vent position, pressing switch to OPEN/VENT CLOSE (rearward) position will lower sun roof to closed position unless switch is released before full CLOSE position in reached. If sun roof switch OPEN/VENT CLOSE position is held or pressed again, sun roof will slide to open position in express mode. Motor will run until full open soft-stop position is reached. From any open position, pressing sun roof switch to CLOSE/VENT OPEN sun roof will slide to close position or stop where switch is released.
Sun roof position is sensed by express module from a position encoding system located in sun roof motor and drive assembly. Three limit switches, LS1, LS2 and LS3 provide grounded input to express module. Sun roof express module is equipped with a timer circuit which stops operation of sun roof motor after 8.4 seconds. When either open and down or close and vent control switch contact is closed, timer begins. Sun roof motor operates until both contacts are open or until 8.4 seconds have elapsed. Sun roof motor direction is determined by polarity of voltage applied to motor.
Sun roof motor is equipped with manual drive capability. Hex head wrench inserted at center of motor may be used to drive sun roof through entire range of travel. Sun roof uses mechanical stops at open and vent positions.