Power Windows: Overview Lexus RX I

Automatic Operation

To partially lower driver's window, press button slightly and hold until window is at desired level. To fully lower window without having to hold button down, press button down firmly and release. Automatic operation is controlled by driver door ECU.

Key Off Operation

The windows can be operated for about 45 seconds after ignition is turned off, or until either front door has been opened. This function is referred to as key off.

Door Key Cylinder Operation

The windows can be operated using key in driver's door key cylinder. To close windows, insert key in driver's door key cylinder, turn key counterclockwise and hold. To open windows, turn key clockwise and hold.

Transmitter (Remote Operation)

Pressing unlock button of multi-remote transmitter (key fob) for 1.5 seconds or more will lower all windows. Window lowering is stopped when unlock button is released.

DURING POWER WINDOW UP OPERATION, WINDOW MOVES DOWN

1. Check window for binding during up operation. If cause is improper window installation or faulty weather strip, repair or replace as necessary. After repairs, go to next step. If cause cannot be identified, go to next step.
2. Adjust limit switch. See «POWER WINDOW MOTOR LIMIT SWITCH»(ref-4409-S22407671362000062200000) under ADJUSTMENTS. Recheck window operation. If operation is not okay, go to next step.
3. Adjust window glass installation. Recheck window operation. If operation is not okay, go to next step.
4. Remove power window motor/regulator assembly. Leave electrical connectors connected. Using master switch, operate window motor/regulator. If window motor/regulator operates without binding, go to next step. If operation is not as specified, repair or replace as necessary.
5. Replace door ECU with a known-good door ECU from another door. Reinstall window motor/regulator assembly and reset limit switch. See «POWER WINDOW MOTOR LIMIT SWITCH»(ref-4409-S22407671362000062200000) under ADJUSTMENTS. Recheck system. If operation is normal, replace door ECU. If operation is not normal, replace power window motor.

DOWN OPERATION INOPERATIVE

Note. This test diagnoses inoperative down operation (jam function) when foreign object restricts window up operation.

1. Ensure AUTO UP ("one-touch") operation is okay with ignition on. Restrict window movement as window is operated upward. Window should switch to downward operation. If point of resistance is such that window opening is greater than 7.874" (200 mm), window will automatically lower 1.969" (50 mm) and stop. If point of resistance is such that window opening is 7.874" (200 mm) or less, window will automatically lower until opening is 7.874" (200 mm) and stop. If operation is as specified, system is okay at this time. If operation is not as specified, go to next step.
2. Reset window motor jam function. See «JAM FUNCTION RESET»(ref-4409-S40472008492000062200000) under ADJUSTMENTS. Recheck window operation. If operation is not okay, replace master switch.