Lexus IS250 · Service Manual BODY

INSPECTION

Inspection


INSPECT SEAT HEATER SWITCH

  1. B114245E06
    Inspect seat heater switch operation.

    1. Measure the resistance according to the value(s) in the table below.

      Resistance:
      Tester Connection
      Switch Position
      Specified Condition
      1 (RV) - 6 (SW)
      OFF: Front RH
      Vol: 0
      Below 2.5 kΩ
      OFF: Front RH
      Vol: 3
      Below 376 Ω
      2 (REL1) - 11 (SW)
      OFF: Front LH
      Vol: 0
      Below 2.5 kΩ
      OFF: Front LH
      Vol: 3
      Below 376 Ω
      7 (BLLH) - 10 (SVSG)
      OFF: Front RH
      Vol: 0
      Below 1.1 kΩ
      OFF: Front RH
      Vol: 3
      Below 111 Ω
      8 (SVS5) - 10 (SVSG)
      Always
      Below 770 - 1.43 kΩ
      9 (BLRH) - 10 (SVSG)
      OFF: Front LH
      Vol: 0
      Below 1.1 kΩ
      OFF: Front LH
      Vol: 3
      Below 111 Ω

  1. Inspect seat heater switch indicator operation.

    1. Apply battery voltage and check operation of the switch, as shown in the table below.

      Standard:
      Measurement Condition
      Condition
      Specified Condition
      Battery positive (+) → Terminal 5 (IG)
      Battery negative (-) → Terminal 12 (E)
      Seat heater switch ON
      Indicator comes on

  1. Inspect seat heater switch illumination.

    1. Apply battery voltage and check operation of the switch, as shown in the table below.

      Standard:
      Measurement Condition
      Specified Condition
      Battery positive (+) → Terminal 4 (ILL+)
      Battery negative (-) → Terminal 3 (ILL-)
      Illumination comes on

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