2005 Lexus LS 430FACTORY OEM SERVICE PROCEDURE

Power Window Control System - Diagnostics: Inspection

  1. INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSY 
    1. Using an electrical tester, check if the diodes are functioning normally.

      Standard: 

      Power window lock switch 

      Driver side switch 

      POWER WINDOW LOCK SWITCH RESISTANCE SPECIFICATIONS

      Tester Connection Switch Position Specified Condition
      6 (PW) - 16 (AUTO) AUTO UP Below 50 Ω
      6 (PW) - 20 (DUP) AUTO UP Below 50 Ω
      6 (PW) -20 (DUP) MANUAL UP Below 50 Ω
      - OFF -
      6 (PW) - 11 (DDN) MANUAL DOWN Below 10 Ω
      6 (PW) - 16 (AUTO) AUTO DOWN Below 10 Ω
      6 (PW) - 11 (DDN) AUTO DOWN Below 50 Ω
      Fig 1: Identifying Power Window Regulator Master Switch Connector Terminals
      G03000826Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using an electrical tester, check if the diodes are functioning normally.

      HINT:

      • As the switch has diodes, a resistance inspection cannot be performed. Use the tester's diodes check function to check the diodes.
      • Connect the tester's leads as shown in the Fig 2 below. If the leads are not connected correctly, the readings will not be accurate. Connect the tester's positive (+) lead to the diode's positive (+) side, and the negative (-) lead to the diode's negative (-) side.
        1. Set the function selector switch to diode check function mode, and check that the diodes are functioning normally.

      Passenger side switch 

      Fig 2: Checking Diodes Function Using Electrical Tester
      G03000827Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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