Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2001 Toyota Avalon XLSFACTORY OEM SERVICE PROCEDURE
Test No. 54: Key Off Power Window Function Does Not Operate
NOTE:
Key off power window function allows all power windows to operate for about 43 seconds after ignition is turned off. When either front door is opened and then closed, key off power window function will not operate and power windows are inoperative
- Check fuses and power supply for body Electronic Control Unit (ECU) and driver's door ECU. Body ECU is located at driver's side of instrument panel on the fuse/relay box. See Figure. Electrical connector B4 (25-pin) and electrical connector B5 (25-pin) are located at each side of body ECU and a 12-pin electrical connector at rear of body ECU. See Figure. Driver's door ECU is located on the driver's door and is incorporated into the power window switch assembly. See Figure. See WIRING DIAGRAMS . For additional wiring for power supply circuit, see POWER DISTRIBUTION article in WIRING DIAGRAMS and WIRING DIAGRAMS in KEYLESS ENTRY SYSTEMS - AVALON article. If fuses are okay, go to next step. If any fuse is defective, repair short in wiring for appropriate fuse.
- Check ignition switch. See IGNITION SWITCH under COMPONENT TESTS. If ignition switch is okay, go to next step. If ignition switch is defective, replace ignition switch and recheck operation of key off power window function. See IGNITION SWITCH under REMOVAL & INSTALLATION.
- Open each door and check that door courtesy light comes on when door is opened and goes off when door is closed. If any door courtesy light does not operate properly when door is open and closed, go to next step. If door courtesy light operates properly when each door is open and closed, go to step 6.
- Check door courtesy switch. See DOOR COURTESY SWITCH under COMPONENT TESTS. If door courtesy switch is okay, go to next step. If door courtesy switch is defective, replace door courtesy switch and recheck operation of key off power window function.
- Check wiring harness and electrical connectors between door courtesy switch and body Electronic Control Unit (ECU). See WIRING DIAGRAMS in KEYLESS ENTRY SYSTEMS - AVALON article. For door courtesy lights on driver's side front door and passenger's side front door, it may be necessary to check wiring between door courtesy light and driver's door ECU or passenger's door ECU. Driver's door ECU and passenger's door ECU are located on each door and is incorporated into the power window switch assembly. See Figure. For additional wiring for interior lighting, see WIRING DIAGRAMS in ILLUMINATION/INTERIOR LIGHTS article. Body ECU is located at driver's side of instrument panel on the fuse/relay box. See Figure. Electrical connector B4 (25-pin) and electrical connector B5 (25-pin) are located at each side of body ECU and a 12-pin electrical connector at rear of body ECU. See Figure. If wiring harness and electrical connectors are okay, go to next step. If wiring harness or electrical connectors are defective, repair as necessary and recheck operation of key off power window function.
- Check driver's door Electronic Control Unit (ECU) and body ECU for proper voltage and input signals. See DRIVER'S DOOR ELECTRONIC CONTROL UNIT and BODY ELECTRONIC CONTROL UNIT under PIN VOLTAGE TESTS. If proper voltage and input signals exist, go to next step. If proper voltage or input signal does not exist, repair as necessary and recheck operation of key off power window function.
- Replace driver's door ECU or body ECU with a known-good body ECU and recheck operation of key off power window function. If key off power window function operates properly, original ECU was defective. If key off power window function still does not operate properly, check wiring harness and electrical connectors for an intermittent problem. Repair wiring harness or electrical connector as necessary.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.