Operation CHARM: Car repair manuals for everyone.

Except Automatic Down

System Description
The operation of the power windows is controlled by the main switch in the master power window switch. When the main switch is in OFF, only the driver's door window can be opened or closed. With the main switch ON, all windows can be opened or closed by either the master power window switch or the window switches in the doors. The driver's window switch has an automatic down mode which is turned on by pushing the switch down to its second position.

The power windows are driven by reversible motors. Each motor is protected by a built-in circuit breaker. If the window switch is held on too long (with the window obstructed, or after the window is fully up or down) the circuit breaker opens the circuit. The circuit breaker resets automatically as it cools.

When the ignition switch is in ON (II) (and for 10 minutes after it is switched to LOCK (0) and as long as both front doors remain closed), the integrated control unit provides voltage to the coil of the power window relay. The contacts of the power window relay close and voltage is applied to the master power window switch and all the window switches in the doors.

Driver's Window
With the ignition switch in ON (II) (and for 10 minutes after it is switched to LOCK (0) and as long as both front doors remain closed), the integrated control unit provides voltage to the coil of the power window relay. The contacts of the power window relay close and voltage is applied to the master power window switch. When you move the driver's power window switch to UP, voltage is applied to the power window motor. The motor's ground path is back through the driver's power window switch. The power window motor drives the window up as long as you hold the switch in the UP position. When you move the switch to DOWN, voltage is applied in the opposite direction and the motor drives the window down as long as you hold the switch in the DOWN position.