2003 Toyota Avalon XLSFACTORY OEM SERVICE PROCEDURE

Power Window Control System: Inspection

  1. Using an ammeter: 

    INSPECT ONE TOUCH POWER WINDOW SYSTEM/ CURRENT OF CIRCUIT 

    Fig 1: Inspecting One Touch Power Window System/ Current Of Circuit Using An Ammeter
    G02818499Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the connector from the master switch.
    2. Connect the positive (+) lead from the ammeter to terminal 1 on the wire harness side connector and the negative (-) lead to negative (-) terminal of the battery.
    3. Connect the positive (+) lead from the battery to terminal 14 on the wire harness side connector.
    4. As the window goes down, check that the current flow is approximately 7 A.
    5. Check that the current increases up to approximately 14.5 A or more when the window stops going down.
    NOTE: The PTC opens some 4 - 90 seconds after the window stops going down, so that check must be made before the PTC operates.

    If the operation is as specified, replace the driver door ECU.

  2. Using an ammeter with a current-measuring probe: 

    INSPECT ONE TOUCH POWER WINDOW SYSTEM/ CURRENT OF CIRCUIT 

    Fig 2: Inspecting One Touch Power Window System/ Current Of Circuit Using An Ammeter With A Current-Measuring Prob
    G02818500Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the driver door ECU with connectors connected.
    2. Attach a current-measuring probe to terminal 25 of the wire harness.
    3. Turn the ignition switch ON and set the power window switch in the down position.
    4. As the window goes down, check that the current flow is approximately 7 A.
    5. Check that the current increases up to approximately 14.5 A or more when the window stops going down.
    NOTE: The PTC opens some 4 - 90 seconds after the window stops going down, so that check must be made before the PTC operates.

    If operation is as specified, replace the driver door ECU.

  3. INSPECT REAR POWER WINDOW SWITCH CONTINUITY 
    Fig 3: Identifying Rear Power Window Switch Connector Terminal View
    G02818501Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    REAR POWER WINDOW SWITCH CONTINUITY REFERENCE

    Switch Position Tester Connection Specified Condition
    UP 5 - 4, 2 - 6 Continuity
    OFF 4 - 6, 2 - 6 No Continuity
    DOWN 2 - 5, 4 - 6 Continuity

    If continuity is not as specified, replace the switch.

  4. INSPECT POWER MAIN RELAY CONTINUITY 
    Fig 4: Inspecting Power Main Relay Continuity
    G02818502Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    POWER MAIN RELAY CONTINUITY REFERENCE

    Condition Tester Connection Specified Condition
    Constant 1 - 2 Continuity
    Apply B+ Between Terminals 1 & 2. 3 - 5 Continuity

    If continuity is not as specified, replace the relay.

  5. Driver's Door: 

    INSPECT POWER WINDOW MOTOR OPERATION 

    Fig 5: Inspecting Power Window Motor Operation (Driver's Door)
    G02818503Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, and check that the motor turns clockwise.
    2. Reverse the polarity, check that the motor turns counterclockwise.
      3. Fig 6: Inspecting Power Window Motor Operation While Reversing Polarity (Driver's Door)
      G02818504Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is not as specified, replace the motor.

    NOTE: Since the jam protection may not work properly be sure to conduct procedures described in HOW TO RESET POWER WINDOW MOTOR (LIMIT SWITCH)  after this inspection.
  6. Front Passenger's Door: 

    INSPECT POWER WINDOW MOTOR OPERATION 

    Fig 7: Inspecting Power Window Motor Operation (Front Passenger's Door)
    G02818505Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, and check that the motor turns clockwise.
    2. Reverse the polarity, check that the motor turns counterclockwise.
      3. Fig 8: Inspecting Power Window Motor Operation While Reversing Polarity (Front Passenger's Door)
      G02818506Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is not as specified, replace the motor.

  7. Rear Left Side Door: 

    INSPECT POWER WINDOW MOTOR OPERATION 

    Fig 9: Inspecting Power Window Motor Operation (Rear Left Side Door)
    G02818507Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, and check that the motor turns clockwise.
    2. Reverse the polarity, check that the motor turns counterclockwise.
      3. Fig 10: Inspecting Power Window Motor Operation while Reversing Polarity (Rear Left Side Door)
      G02818508Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is not as specified, replace the motor.

  8. Rear Right Side Door: 

    INSPECT POWER WINDOW MOTOR OPERATION 

    Fig 11: Inspecting Power Window Motor Operation (Rear Right Side Door)
    G02818509Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, and check that the motor turns clockwise.
    2. Reverse the polarity, check that the motor turns counterclockwise.
      3. Fig 12: Inspecting Power Window Motor Operation While Reversing Polarity (Rear Right Side Door)
      G02818510Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is not as specified, replace the motor.

  9. Driver's door: 

    INSPECT POWER WINDOW MOTOR PTC THERMISTOR OPERATION 

    Fig 13: Inspecting Power Window Motor PTC Thermistor Operation Using Ammeter (Driver's Door)
    G02818511Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the connector from the power window motor.
    2. Connect the positive (+) lead from the ammeter to terminal 2 on the wire harness side connector and the negative (-) lead to negative terminal of the battery.
    3. Connect the positive (+) lead from the battery to terminal 1 on the wire harness side connector, and raise the window to the fully position.
    4. Continue to apply voltage, and check that the current changes to less than 1 A with 4 to 90 seconds.
    5. Disconnect the leads from terminals.
    6. Approximately 60 seconds later, connect the positive (+) lead from the battery to terminal 2 and negative (-) lead to terminal 1, and check that the window begins to descended.
      Fig 14: Inspecting Power Window Motor PTC Thermistor Operation Without Ammeter (Driver's Door)
      G02818512Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is not as specified, replace the motor.

  10. Front Passenger's door: 

    INSPECT POWER WINDOW MOTOR PTC THERMISTOR OPERATION 

    Fig 15: Inspecting Power Window Motor PTC Thermistor Operation With Ammeter (Front Passenger's Door)
    G02818513Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the connector from the power window motor.
    2. Connect the positive (+) lead from the ammeter to terminal 1 on the wire harness side connector and the negative (-) lead to negative terminal of the battery.
    3. Connect the positive (+) lead from the battery to terminal 2 on the wire harness side connector, and raise the window to the fully position.
    4. Continue to apply voltage and check that the current changes to less than 1 A within 4 to 90 seconds.
    5. Disconnect the leads from the terminals.
    6. Approximately 60 seconds later, connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, and check that the window begins to descend.
      Fig 16: Inspecting Power Window Motor PTC Thermistor Operation Without Ammeter (Front Passenger's Door)
      G02818514Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is not as specified, replace the motor.

  11. Rear LH door: 

    INSPECT POWER WINDOW MOTOR PTC THERMISTOR OPERATION 

    Fig 17: Inspecting Power Window Motor PTC Thermistor Operation Using Ammeter (Rear LH Door)
    G02818515Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the connector from the power window motor.
    2. Connect the positive (+) lead from the ammeter to terminal 2 on the wire harness side connector and the negative (-) lead to negative terminal of the battery.
    3. Connect the positive (+) lead from the battery to terminal 2 on the wire harness side connector, and raise the window to the fully position.
    4. Continue to apply voltage and check that the current changes to less than 1 A within 4 to 90 seconds.
    5. Disconnect the leads from the terminals.
    6. Approximately 60 seconds later, connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, and check that the window begins to descend.
      Fig 18: Inspecting Power Window Motor PTC Thermistor Operation Without Ammeter (Rear LH Door)
      G02818516Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is not as specified, replace the motor.

  12. Rear RH Door: 

    INSPECT POWER WINDOW MOTOR PTC THERMISTOR OPERATION 

    Fig 19: Inspecting Power Window Motor PTC Thermistor Operation Using Ammeter (Rear RH Door)
    G02818517Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the connector from the power window motor.
    2. Connect the positive (+) lead from the ammeter to terminal 2 on the wire harness side connector and the negative (-) lead to negative terminal of the battery.
    3. Connect the positive (+) lead from the battery to terminal 1 on the wire harness side connector, and raise the window to the fully position.
    4. Continue to apply voltage and check that the current changes to less than 1 A within 4 to 90 seconds.
    5. Disconnect the leads from the terminals.
    6. Approximately 60 seconds later, connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, and check that the window begins to descend.
      Fig 20: Inspecting Power Window Motor PTC Thermistor Operation Without Ammeter (Rear RH Door)
      G02818518Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is not as specified, replace the motor.

  13. INSPECT JAM PROTECTION FUNCTION 
    NOTE: Never, ever be caught any part of your body when checking.
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.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.