Windows: Description and Operation

The power window system is controlled by the power window key-off timer circuit in the integrated control unit. The timer circuit allows the windows to be operated for several minutes after the ignition is turned to LOCK (0). This lets you close the windows without turning the ignition to ON (II) again. Opening either door will turn OFF the timer circuit.

Power to the windows is controlled by the main switch in the master power window switch. When the main switch is in OFF, only the driver's window can be opened or closed. With the main switch in ON, both power windows can be opened or closed. The driver's window is controlled by the driver's switch in the master panel and the power window control unit. The passenger's window can be controlled by the passenger's switch in the master panel or by the switch in the passenger's door.

Battery voltage is applied at all times through fuse 34 to the power window key-off timer circuit in the integrated control unit and from the battery to the power window relay contacts. With the ignition in ON (II) or START (III), battery voltage is supplied through fuse 5 to the power window key-off timer circuit. The timer applies voltage to the coil of the power window relay. The energized relay then supplies battery voltage through fuses 47 and 50 to the master switch, passenger window switch, and power window control unit.

When you turn the ignition to LOCK (0), the timer circuit continues to energize the power window relay for several minutes or until one of the doors is opened.

Driver's Window
When you move the driver's switch to the UP position, voltage is applied to the UP input of the power window control unit. The control unit then supplies voltage through the motor control UP output terminal to move the window up.

When you move the driver's switch to the DOWN position, voltage is applied to the DOWN input of the power window control unit. The control unit then supplies voltage through the motor control DOWN output terminal to move the window down.

When you move the driver's switch to AUTO, voltage is applied to the auto hold DOWN input terminal of the power window control unit. The control unit then supplies voltage to the motor control DOWN output to move the window down. Once the window starts to move, you can release the switch and the window will continue to the full down position.

The driver's power window motor contains a pulser used by the power window control unit to determine when the window has stopped moving. When the motor is running, a voltage is induced in the pulser. When the motor stops, no voltage is induced. The power window control unit turns OFF power to the motor when it detects no induced voltage at its sensor input terminal.

Passenger's Window
With the power window main switch ON, the passenger's window can be controlled from either the master switch or the passenger's door switch.

When you push the master panel passenger's switch UP or DOWN, voltage is applied from the passenger's switch contacts through the passenger's door window switch to the motor, and the motor runs. The motor is grounded through the master panel passenger's switch and the passenger's door switch contacts, and the main switch contacts in the master panel to G401.

When you push the passenger's door switch UP or DOWN, voltage is applied from the switch contacts to the motor, and the motor runs. The motor is grounded through the passenger's door switch and the master panel passenger's switch contacts, and the main switch contacts in the master panel, to G401.