LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2003 >> LS 430 >> Repair and Diagnosis >> External Pages >> Different car >> Section 915 (Power Window Control System - Diagnostics) >> Auto Up/Down Function Does Not Operate >> Inspection Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Inspection Procedure

WARNING: This page is about a different car, the 2005 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK MANUAL UP/DOWN FUNCTION (DRIVER SIDE) 
    1. Check that the door glass can be operated manually.
    1. NG: OTHER PROBLEM (See MANUAL UP/DOWN FUNCTION DOES NOT OPERATE ON DRIVER SIDE  )

    OK: Go to next step. 

  2. CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSY 
    1. Turn the ignition switch ON.
    2. Operate the power window switch on the driver side.
    3. Check the blinking pattern of the illumination as shown in the illustration.
      1. If the switch indicates (1), proceed to A.
      2. If the switch indicates (2) or (3), proceed to B.
      3. If the switch indicates normal, proceed to C.
      Fig 1: Locating Power Window Switch
      G02577789Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 2: Power Window Regulator Master Switch Assy Blinking Pattern
      G02577790Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. B: Go to step  4
    2. C: REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSY 

    A: Go to next step. 

  3. RESET POWER WINDOW REGULATOR MOTOR (DRIVER SIDE) 
    1. Turn the ignition switch ON.
    2. Open the door glass.
    3. Fully pull up the AUTO switch of the power window master switch until the door glass is fully closed.
    4. Check that the AUTO UP/DOWN function operates normally.
    1. OK: END

    NG: Go to next step. 

  4. CHECK WIRE HARNESS (MASTER SWITCH <=> MOTOR) 
    1. Disconnect the D17 switch connector.
    2. Disconnect the P12 motor connector (driver side).
    3. Check the continuity between the wire harness side connectors.
      Fig 3: Master Switch - Motor Continuity Chart
      G02577791Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 4: Identifying Terminals Of Power Window Master Switch Assy And Motor Assy LH (Driver Side) Connectors
      G02577792Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK 

    REPLACE POWER WINDOW REGULATOR MOTOR ASSY LH (DRIVER SIDE)