2007 Lexus GX 470FACTORY OEM SERVICE PROCEDURE

Inspection Procedure

  1. CHECK POWER WINDOW REGULATOR MASTER SWITCH 
    1. Using the intelligent tester, check operation of the master switch using the DATA LIST.

      Standard 

      DATA LIST in D-DOOR ECU 

    DATA LIST IN D-DOOR ECU

    Measurement Item Label Parameter
    Driver switch on master switch P/W AUTO SW ON/OFF

    NG:  Go to step  3

    OK: Go to next step 

  2. CHECK WIRE HARNESS (POWER WINDOW REGULATOR MASTER SWITCH - POWER WINDOW MOTOR) 
    Fig 1: Identifying Power Window Regulator Master Switch & Power Window Motor Connector Terminals
    G05266773Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D18 master switch connector.
    2. Remove the front door trim LH.
      3. Fig 2: Identifying Power Window Regulator Motor
      G05266774Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the P10 power window motor connector.
    4. Check the continuity between the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Terminal No. Specified Condition
      D18-11 - P10-1 Below 1 Ω
      D18-1 - P10-2 Below 1 Ω
      D18-1 - Body ground No continuity
      D18-11 - Body ground No continuity
    5. Reference:

      Check operation of the power window motor (driver side).

      1. Remove the motor.
      2. Apply battery voltage to the connector between terminals 1 and 2.
      3. Check that the motor rotates smoothly.
      NOTE: Do not apply battery voltage to the terminals except 1 and 2.

      Standard 

      TERMINALS AND MOTOR GEAR ROTATION REFERENCE

      Terminal No. Motor Gear Rotation
      Battery positive voltage → 2
      Battery negative voltage → 1      		 Clockwise
      Battery positive voltage → 1
      Battery negative voltage → 2      		 Counterclockwise

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE POWER WINDOW REGULATOR MOTOR (DRIVER SIDE) 

  3. INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (FOR GROUND) 
    Fig 3: Identifying Power Window Regulator Master Switch Connector Terminals
    G05266737Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the master switch (the connector is connected).
    2. Check the continuity between terminal 2 and the body ground.

      Standard: 

      Below 1 → 

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  4. INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (FOR POWER SOURCE) 
    Fig 4: Identifying Power Window Regulator Master Switch Connector Terminals
    G05266737Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Check the voltage between the terminals.

      Standard voltage 

    VOLTAGE SPECIFICATION

    Terminal No. Condition Specified Condition
    9 - 2 Constant 10 to 14 V
    20 - 2 Ignition ON 10 to 14 V
    10 - 2 Constant 10 to 14 V

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

    OK: REPLACE POWER WINDOW REGULATOR MASTER SWITCH 

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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.

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