2010 Scion xB AutomaticFACTORY OEM SERVICE PROCEDURE

Driver Side Power Window does not Operate with Power Window Master Switch: Procedure

  1. CHECK HARNESS AND CONNECTOR (SWITCH INPUT POWER SUPPLY) 
    1. Disconnect the E4 power window regulator master switch assembly connector.
      Fig 1: Identifying E4 Power Window Regulator Master Switch Assembly Harness Connector Terminals
      GTY166269Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the ignition switch ON.
    3. Measure the voltage of the wire harness side connector.

      Standard voltage

      Tester Connection Switch Condition Specified Condition
      E4-6 (B) - E4-1 (E) Ignition switch ON 11 to 14 V
    4. Reconnect the power window regulator master switch assembly connector.

    NG → CHECK AND REPLACE POWER SOURCE AND WIRE HARNESS 

    OK: Go to next step 

  2. INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY 
    Fig 2: Identifying Power Window Regulator Master Switch And Connector Terminals
    GTY160537Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the power window regulator master switch assembly.
    2. Measure the resistance of the switch when the switch is operated.

      Standard resistance

      Tester Connection Window Lock Switch Condition Power Window Switch Condition Specified Condition
      1 (E) - 4 (D)
      3 (U) - 6 (B)      		 Always
      (ON / OFF)      		 UP Below 1 Ω
      1 (E) - 3 (U)
      1 (E) - 4 (D)      		 Always
      (ON / OFF)      		 OFF Below 1 Ω
      1 (E) - 3 (U)
      6 (B) - 4 (D)      		 Always
      (ON / OFF)      		 DOWN Below 1 Ω
      1 (E) - 3 (U)
      6 (B) - 4 (D)      		 Always
      (ON / OFF)      		 AUTO DOWN Below 1 Ω
    3. Reinstall the power window regulator master switch assembly.

    NG → See step   5 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (MASTER SWITCH - MOTOR (FRONT LH)) 
    1. Disconnect the E4 power window regulator master switch assembly connector.
    2. Disconnect the E3 front power window regulator motor assembly LH connector.
      Fig 3: Identifying E3 Front Power Window Regulator Motor LH Harness Connector Terminals
      GTY160280Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance

      Tester Connection Condition Specified Condition
      E4-4 (D) - E3-1 (D) Always Below 1 Ω
      E4-3 (U) - E3-2 (U) Always Below 1 Ω
      E4-4 (D) or E3-1 (D) - Body ground Always 10 kΩ or higher
      E4-3 (U) or E3-2 (U) - Body ground Always 10 kΩ or higher
    4. Reconnect the E4 power window regulator master switch assembly connector.
    5. Reconnect the E3 front power window regulator motor assembly LH connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   4 

  4. REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH. Refer to  REMOVAL 
  5. REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY. Refer to  REMOVAL 
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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.
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