2008 Lexus ES 350FACTORY OEM SERVICE PROCEDURE

Inspection Procedure

  1. INSPECT POWER WINDOW REGULATOR SWITCH 
    1. Disconnect the H6 connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      2 (U) - 4 (A) - 5 (E) Auto UP Below 1 Ω
      2 (U) - 5 (E) Manual UP Below 1 Ω
      5 (E) - 10 (D) Manual DOWN Below 1 Ω
      4 (A) - 10 (D) - 5 (E) Auto DOWN Below 1 Ω
      Fig 1: Identifying H6 Connector Terminals
      G05253583Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE POWER WINDOW REGULATOR SWITCH 

    OK: Go to next step. 

  2. REPLACE WIRE HARNESS (POWER WINDOW REGULATOR SWITCH - POWER WINDOW ECU) 
    1. Disconnect the H5 and H6 connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      H5-4 (AUTO) - H6-4 (A) Always Below 1 Ω
      H5-5 (LED) - H6-8 (LED) Always Below 1 Ω
      H5-7 (DWN1) - H6-10 (D) Always Below 1 Ω
      H5-10 (UP1) - H6-2 (U) Always Below 1 Ω
      H5-4 (AUTO) - Body ground Always 10 kΩ or higher
      H5-5 (LED) - Body ground Always 10 kΩ or higher
      H5-7 (DWN1) - Body ground Always 10 kΩ or higher
      H5-10 (UP1) - Body ground Always 10 kΩ or higher
      Fig 2: Checking Wire Harness (Power Window Regulator Switch - Power Window ECU)
      G05253584Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: END 

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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.