Driver's Power Window Auto-Operation Does Not Function Properly
DRIVER'S POWER WINDOW AUTOMATIC OPERATION DOES NOT FUNCTION PROPERLYSystem Description
Power windows can be raised or lowered with each sub-switch or the power window main switch located on the driver's door trim when ignition switch is in ON position.
When power window lock switch is locked, no windows can be raised or lowered except for driver's door window.
When ignition switch is in ON position, to fully open/close the driver's door window, press down/pull up completely on automatic switch (main switch) and release it; it needs not be held. The window will automatically open/close all the way. To stop the window, pull up/press down then release the switch.
When ignition switch is turned to OFF position from ON or START position, power window can be raised or lowered for 45 seconds. This operation (retained power operation) is canceled when front door is opened. Front power window main switch and front power window switch RH monitor power window regulator motor operation and power window position (full closed or other) for driver's and passenger's power window by the signals from encoder and limit switch in front power window regulator.
When front power window main switch or front power window switch RH detects interruption during the following close operation in driver's or passenger's door,
- automatic close operation when ignition switch is in ON position
- automatic close operation during retained power operation
- manual close operation during retained power operation
Front power window main switch or front power window switch RH controls driver's or passenger's power window regulator motor for open and power window will be lowered about 150 mm (5.91 in).
Possible Cause
- Door window slide mechanism
- Limit switch
- Encoder
- Power window main switch
- Circuit open or short
Diagnostic Repair Procedure (for confirmed incidents)
1. Check front power window main switch or front power window switch RH.
2. Check obstacles in window, glass molding, etc.
3. Check worn or deformed glass molding.
4. Check door sash to see if is tilted too far inward or outward.
5. Check power supply to limit switch.
Check voltage between front power window main switch terminal 15 or front power window switch RH terminal 16 and ground. See illustration.
a. Replace front power window main switch or front power window switch RH.
6. Check limit switch operation:
Check voltage between front power window main switch terminal 15 or front power window switch RH terminal 16 and ground during power window closing operation. See illustration.
a. Reset limit switch. Then check voltage between front power window main switch terminal 15 or front power window switch RH terminal 16 and ground during power window closing operation at least ten times.
7. Check encoder:
Measure voltage between front power window main switch terminal 14 or front power window switch RH terminal 19 and ground with oscilloscope when power window is in automatic closing operation.
8. Replace front power window main switch or front power window switch RH.