2004 Scion xA AutomaticFACTORY OEM SERVICE PROCEDURE

Power Window Control System: Inspection

  1. POWER WINDOW SYSTEM CIRCUIT 
    Fig 1: Power Window System Circuit Diagram
    G03382732Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSY 
    1. Check the resistance between each terminal of the connector when the switch is operated.
      Fig 2: Inspecting Power Window Regulator Master Switch Assembly
      G03382733Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      Driver switch 

      SPECIFIED CONDITION

      Window Lock Switch Condition Power Window Switch Condition Tester Connection Specified Condition
      Constant (ON/OFF) UP 1 - 9 Below 1Ω
      3 - 9
      4 - 6
      4 - 7
      OFF 1 - 4
      3 - 4
      1 - 9
      3 - 9
      DOWN 1 - 4
      3 - 4
      6 - 9
      7 - 9
      AUTO DOWN 1 - 4
      3 - 4
      6 - 9
      7 - 9

      Front passenger switch 

      SPECIFIED CONDITION

      Window Lock Switch Condition Power Window Switch Condition Tester Connection Specified Condition
      OFF UP 1 - 15 Below 1Ω
      3 - 15
      6 - 18
      7 - 18
      OFF 1 - 15
      3 - 15
      1 - 18
      3 - 18
      DOWN 1 - 18
      3 - 18
      6 - 15
      7 - 15
      ON UP 6 - 18
      7 - 18
      OFF
      DOWN 6 - 15
      7 - 15

      Rear LH switch 

      SPECIFIED CONDITION

      Window Lock Switch Condition Power Window Switch Condition Tester Connection Specified Condition
      OFF UP 1 - 13 Below 1Ω
      3 - 13
      6 - 12
      7 - 12
      OFF 1 - 12
      3 - 12
      1 - 13
      3 - 13
      DOWN 1 - 12
      3 - 12
      6 - 13
      7 - 13
      ON UP 6 - 12
      7 - 12
      OFF
      DOWN 6 - 13
      7 - 13

      Rear RH switch 

      SPECIFIED CONDITION

      Window Lock Switch Condition Power Window Switch Condition Tester Connection Specified Condition
      OFF UP 1 - 16 Below 1Ω
      3 - 16
      6 - 10
      7 - 10
      OFF 1 - 10
      3 - 10
      1 - 16
      3 - 16
      DOWN 1 - 10
      3 - 10
      6 - 16
      7 - 16
      ON UP 6 - 10
      7 - 10
      OFF 10 - 16
      DOWN 6 - 16
      7 - 16

      If the result is not as specified, replace the master switch assy.

    2. Apply battery voltage to the master switch terminals and check the AUTO lamp.
      Fig 3: Applying Battery Voltage To Master Switch Terminals
      G03382734Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      MEASUREMENT CONNECTION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) --> Terminal 6
      Battery negative (-) --> Terminal 3      		 AUTO lamp illuminates

      If the result is not as specified, replace the master switch assy.

  3. INSPECT POWER WINDOW REGULATOR SWITCH ASSY 
    Fig 4: Identifying Power Window Regulator Switch Assembly
    G03382735Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Check the resistance between each terminal of the connector when the switch is operated.

      Standard: 

      SWITCH CONNECTION AND SPECIFIED CONDITION

      Switch Condition Tester Connection Specified Condition
      UP 1 - 2 Below 1Ω
      3 - 4
      OFF 1 - 2
      3 - 5
      DOWN 1 - 4
      3 - 5

      If the result is not as specified, replace the regulator switch assy.

  4. INSPECT POWER WINDOW REGULATOR MOTOR 
    1. Check operation of the regulator motor.
      NOTE:
      • The driver side and rear RH regulator motors should be inspected using the same procedure.
      • The passenger side and rear LH regulator motors should be inspected using the same procedure.
      1. Apply battery voltage to the motor terminals.
      2. Check that the motor operates smoothly.

        Standard: 

        Driver side and rear RH 

        MEASUREMENT CONNECTION AND SPECIFIED CONDITION

        Measurement Condition Specified Condition
        Battery positive (+) --> Terminal 4
        Battery negative (-) --> Terminal 5        		 Motor gear rotates clockwise
        Battery positive (+) --> Terminal 5
        Battery negative (-) --> Terminal 4        		 Motor gear rotates counterclockwise

        Front passenger side and rear LH 

        MEASUREMENT CONNECTION AND SPECIFIED CONDITION

        Measurement Condition Specified Condition
        Battery positive (+) --> Terminal 5
        Battery negative (-) --> Terminal 4        		 Motor gear rotates clockwise
        Battery positive (+) --> Terminal 4
        Battery negative (-) --> Terminal 5        		 Motor gear rotates counterclockwise

        If the result is not as specified, replace the motor assy.

        Fig 5: Inspecting Power Window Regulator Motor
        G03382736Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check operation of the PTC inside the regulator motor.
      NOTE: The work must be performed with the power window regulator and door glass installed to the vehicle.
      1. Set an electrical tester DC 400 A probe to the wire harness of terminal 4 or 5.
        NOTE: Match the arrow mark of the probe with the current direction.
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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.