2008 Lexus LS 600hLFACTORY OEM SERVICE PROCEDURE

Power Switch: Inspection

  1. INSPECT POWER SWITCH 
    1. Measure the resistance according to the value (s) in the table below
      Fig 1: Removing Power Switch
      G05780717Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      7 (SS1) - 5 (GND) Not pushed 10 kΩ or higher
      2 (SS2) - 5 (GND) Not pushed 10 kΩ or higher
      7 (SS1) - 5 (GND) Pushed Below 1 Ω
      2 (SS2) - 5 (GND) Pushed Below 1 Ω
      Fig 2: Identifying Power Switch Connector
      G05780718Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the power switch

    2. Apply battery voltage between the terminals of the switch, and check the illumination condition of the switch.

      HINT:

      • If the positive (+) lead and the negative (-) lead are incorrectly connected, the power switch indicator will not illuminate
      • If the voltage is too low, the indicator will not illuminate

        OK 

        BATTERY VOLTAGE SPECIFICATION

        Measurement Condition Specified Condition
        Battery positive (+) → Terminal 11 (SWIL)
        Battery negative (-) → Terminal 4 (COM) or 5 (GND)
        Illuminates (illumination of lettering)
        Battery positive (+) → Terminal 12 (INDS)
        Battery negative (-) → Terminal 4 (COM) or 5 (GND)
        Illuminates (green)
        Battery positive (+) → Terminal 13 (INDW)
        Battery negative (-) → Terminal 4 (COM) or 5 (GND)
        Illuminates (amber)
        Fig 3: Identifying Power Switch Connector
        G05780719Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        If the result is not as specified, replace the power switch.

Factory Service Tools

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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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