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HOMESERVICE MANUALSLEXUS2007ES 350REPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTSEATSSEATSEAT HEATER SWITCHINSPECTION
2007 Lexus ES 350

Seat Heater Switch: Inspection

2007 Lexus ES 350SECTION Inspection
  1. INSPECT SEAT HEATER SWITCH 
    1. Inspect seat heater switch operation.
      1. Measure the resistance according to the value(s) in the table below.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Tester Connection Switch Position Specified Condition
        F3-1 (RV) - F3-6 (SW) OFF: Front RH Vol: 0 Below 2.5 kΩ
        OFF: Front RH Vol: 3 Below 376 Ω
        F3-2 (REL1) - F3-11 (SW) OFF: Front LH Vol: 0 Below 2.5 kΩ
        OFF: Front LH Vol: 3 Below 376 Ω
        F3-7 (BLLH) - F3-10 (SVSG) OFF: Front RH Vol: 0 Below 1.1 kΩ
        OFF: Front RH Vol: 3 Below 111 Ω
        F3-8 (SVS5) - F3-10 (SVSG) Always Below 770 Ω to 1.43 kΩ
        F3-9 (BLRH) - F3-10 (SVSG) OFF: Front LH Vol:0 Below 1.1 kΩ
        OFF: Front LH Vol: 3 Below 111 Ω
        Fig 1: Inspecting Seat Heater Switch
        G05254146Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Inspect seat heater switch indicator operation.
      1. Apply battery voltage and check operation of the switch, as shown in the table below.

        OK 

        MEASUREMENT CONDITION CHART

        Measurement Condition Condition Specified Condition
        Battery positive (+) → Terminal F3-5 (IG)
        Battery negative (-) → Terminal F3-12 (E)        		 Seat heater switch ON Indicator comes on
    3. Inspect seat heater switch illumination.
      1. Apply battery voltage and check operation of the switch, as shown in the table below.

        OK 

        MEASUREMENT CONDITION CHART

        Measurement Condition Specified Condition
        Battery positive (+) → Terminal F3-4 (ILL+)
        Battery negative (-) → Terminal F3-3 (ILL-)        		 Illumination comes on
RENDER: 1.0x

NO RELATED

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
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  • • You are missing required tools, torque specs, or safe lifting equipment.
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