Principles of Operation

PRINCIPLES OF OPERATION

The glass, frames and mechanisms include the front door window motor(s), power vent window motor(s), window control switches, power vent window glass, front door(s) window glass, front door window regulator(s) and the windshield glass.

One-Touch Down Window
The one-touch down feature can be activated by pressing the LH window control switch to the second down position. This allows the LH door window glass to move downward until it is fully lowered. Momentarily pressing the LH window control switch (in either direction) while the window is moving downward, will stop the front door window glass and restore proportional operation.

Door Window Glass
The bottom of the door window glass is mounted on a bracket which is part of the door window regulator. Door window glass bracket spacers provide attachment points for the door window glass and prevent direct contact between the slider bracket and the door window glass.

Window Control Switch
The LH window control switch can be used to power either the LH window or the RH window. A single window control switch is located on the passenger door armrests to activate the passenger window only. The LH window control switch supplies voltage and a ground to the window motors for operation of the front window motors in the commanded direction.

Smart Junction Box (SJB)
The SJB, which supplies voltage, has inputs and outputs to many electrical systems of the vehicle. Voltage is supplied to the LH window control switch from the accessory delay relay 2 for the LH window motor. Voltage is also supplied to the LH window control switch from the accessory delay relay 1 for the RH window motor. The power vent window control switch receives voltage from the accessory delay relay 1.

Passenger Front Power Window
The passenger front power window is controlled by the RH or LH window control switch. When the RH window is controlled by the LH window control switch, voltage and ground are supplied by the LH window control switch. When the RH window is controlled by the RH window control switch, voltage is supplied by the accessory delay relay 1 and ground is supplied by the LH window control switch.

Power Vent Windows
The power vent window switch receives voltage from the accessory delay relay 1. When the power vent window switch is pressed to the open position, an internal open relay will supply voltage to both of the power vent window motors. This will operate the motors to the open position. When the power vent window switch is pressed in the closed position, an internal close relay will supply voltage to both of the power vent window motors. This will operate the motors to the closed position.

Heated Rear Window
For vehicles equipped with electronic automatic temperature control (EATC), the heated rear window is controlled by the SJB and the EATC module. The heated rear window switch is incorporated into the EATC module. When the switch is pressed ON, the EATC module sends a message over the SCP network to the SJB. The SJB grounds the heated rear window relay coil control circuit. The ground signal closes the heated rear window relay which applies power to the heated rear window grid. The heated rear window eliminates condensation on the rear window.

For vehicles equipped with manual temperature control, the heated rear window is controlled by the SJB and the heated rear window switch. The heated rear window switch is incorporated into the function selector switch assembly. When the switch is pressed ON, a ground signal is supplied to the SJB. The SJB then grounds the heated rear window relay coil control circuit. The ground signal closes the heated rear window relay which supplies power to the heated rear window grid. The heated rear window eliminates condensation on the rear window.

Delayed Accessory
The delayed accessory feature allows the power windows, power vent windows and audio system to function for up to 10 minutes after the ignition is turned off or until any door is opened. The delayed accessory function is controlled by the SJB. When the ignition switch is turned from ON to OFF, the SJB begins the timing sequence. If a door is opened, the SJB will cancel the delayed accessory function by de-energizing the delayed accessory relay.