Toyota Aqua Power Window Suddenly Stopped Working – What Could Be Wrong?

Hi!
The issue with one of your power windows in the Toyota Aqua not working while the others are functioning fine could result from several causes. Here’s how to approach it:
Possible Causes:

Faulty Window Motor: The motor responsible for moving the affected window may have failed.
Blown Fuse: While unlikely, individual window fuses may exist, and a blown fuse could affect only that window.
Wiring Problem: Loose, frayed, o r damaged wiring in the door harness of the affected window can interrupt the electrical connection.
Defective Switch: A malfunction in the individual door switch o r the driver-side master control switch could prevent the window from responding.
Window Regulator Failure: If the regulator that guides the window is broken o r jammed, it can cause the window to stop working.

Steps to Diagnose and Fix:

Check the Fuse: Locate the fuse box and inspect any fuses labeled for power windows. Replace a blown fuse, if found.
Test the Switch: Use the driver-side master control and the individual door switch to see if either works. If both fail, the motor o r wiring is more likely the issue.
Listen for Motor Noise: Press the switch and listen for any sounds coming from inside the door. A faint clicking o r humming indicates the motor is trying to work but might be jammed.
Inspect Wiring: Check the wiring harness between the car body and the door usually visible inside the rubber boot. Look for damaged o r disconnected wires.
Manually Operate the Window: Remove the door panel to access the motor and regulator. Try manually moving the window to determine if the regulator is jammed o r stuck.
Test the Motor: Use a multimeter to check if power is reaching the motor when the switch is activated. If power is present but the motor doesn’t work, it needs replacement.

Recommendations:

Motor o r Regulator Issue: Replace the motor-regulator assembly if it’s found to be faulty.
Switch Problem: If the issue lies with the individual door switch, replacing it should resolve the problem. Ensure the driver-side control switch isn’t causing the issue for the specific window.
Professional Help: If the wiring is damaged o r the diagnosis is unclear, consult an auto electrician for repairs.

By systematically checking these components, you can pinpoint the cause and take appropriate steps to fix the non-functioning power window.