LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2009 >> GX 470 >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window Control System (Diagnostic Codes & Symptom Tests) >> Power Window Control System >> Manual Up / Down Function Does Not Operate On Rear LH Only >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Manual Up / Down Function Does Not Operate On Rear LH Only: Procedure

  1. INSPECT POWER WINDOW REGULATOR SWITCH (REAR LH) 
    1. Remove the power window switch (the connector is connected).
      Fig 1: Identifying Power Window Regulator Switch Connector Terminals
      GTY120591Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the continuity between terminal 7 and the body ground.

      Standard resistance

      Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  2. INSPECT POWER WINDOW REGULATOR SWITCH (REAR LH) 
    1. Check the voltage between terminals 12 and 7.
      Fig 2: Identifying Power Window Regulator Switch Connector Terminals
      GTY120591Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage

      10 to 14 V (Constant)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (WINDOW REGULATOR SWITCH - POWER SOURCE) 

    OK: Go to next step 

  3. INSPECT POWER WINDOW REGULATOR SWITCH (REAR LH) 
    1. Turn the ignition switch ON.
      Fig 3: Identifying Power Window Regulator Switch Connector Terminals
      GTY120591Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the voltage between terminals 11 and 7 when operating the window lock switch on the master switch.

      Standard voltage

      Terminal No. Window Lock Switch Specified Condition
      11 - 7 ON 5 V
      OFF Less than 1 V

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (WINDOW REGULATOR SWITCH - WINDOW REGULATOR MASTER SWITCH) 

    OK: Go to next step 

  4. CHECK WIRE HARNESS (POWER WINDOW REGULATOR SWITCH - POWER WINDOW MOTOR) 
    1. Disconnect the P8 power window switch connector.
      Fig 4: Identifying Power Window Regulator Switch & Power Window Regulator Motor Connector Terminals
      GTY120752Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the rear door trim LH.
    3. Disconnect the P12 power window motor connector.
    4. Check the continuity between the wire harness side connectors.

      Standard resistance

      Terminal No. Specified Condition
      P8-1- P12-2 Below 1 Ω
      P8-6 - P12-1 Below 1 Ω
      P8-1 - Body ground No continuity
      P8-6 - Body ground No continuity

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  5. INSPECT POWER WINDOW REGULATOR MOTOR (REAR LH) 
    1. Remove the motor.
      Fig 5: Identifying Power Window Regulator Motor (Rear LH)
      GTY120717Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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

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

    NG → REPLACE POWER WINDOW REGULATOR MOTOR 

    OK → REPLACE POWER WINDOW REGULATOR SWITCH (REAR LH)