DESCRIPTION & OPERATION
| WARNING | Vehicles are equipped with air bag supplemental restraint system. Before attempting any repairs involving steering column, instrument panel or related components, see SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM in appropriate AIR BAG RESTRAINT SYSTEMS article. 1995 - AIR BAG RESTRAINT SYSTEM 1996 - AIR BAG RESTRAINT SYSTEM |
| CAUTION | When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery. |
The power window system raises and lowers the window glass in each door using electrical power. The component parts of this system are power window circuit breaker, power window relay, master switch, power window switch and the power window motors.
The system works with the ignition switch in the ON position. Current flows through the gauge fuse to the power main relay to ground, this activates the relay and the current flowing to the relay from power CB flows to the relay, to the power window master switch, to the front and rear power window switches.
OPERATION (DRIVER'S WINDOW)
Ignition switch must be in the ON position and the power window master switch is in the UP position. The current flowing to the power window master switch flows through the master switch to the power window motor to the master switch to ground and causes the power window motor to rotate in the UP direction. The window ascends only while the switch is being pushed.
In down operation, the flow of current from the power window master switch to the master switch causes the flow of current from the motor to the master switch to ground, flowing in the opposite direction to manual up operation and causing the motor to rotate in reverse, lowering the window.
AUTO DOWN OPERATION
With auto down operation the ignition switch must be in the ON position and with the power window master switch in the down position. Current flowing to the master switch flows to the master switch to the power window motor to the master switch to ground, causing the motor to rotate towards the down side.
Then the solenoid in the master switch is activated and it locks the auto switch being pushed, causing the motor to continue to rotate in auto down operation. When the window has completely descended, the current flows between the master switch and increases. As a result, the solenoid stops operating, the auto switch turns off and flows from the master switch to is cut off, stopping the motor so that auto stop occurs.
OPERATION (PASSENGER'S WINDOW)
When the power window switch (passenger's) is pulled to the up side, current flowing from the power window switch flows to the power window switch, the master switch, to ground and causes the power window motor (passenger's) to rotate in the up direction. The up operation continues only while the power window switch is pulled to the up side. When the window descends, the current flowing to the motor flows in the opposite direction, and the motor moves in reverse. When the window lock switch is pushed to the lock side, the ground circuit to the passenger's window becomes open. As a result, even if open/close operation of the passenger's window is tried, the current from the power window master switch is not grounded and the motor does not rotate, so the passenger's window can not be operated and window lock occurs. Furthermore, rear left hand and right hand windows operate the same as the above circuit.
