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Home >> Lexus >> 2009 >> LS 460L AWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning >> Air Conditioning System >> DTC B1469/69 Infrared Ray Sensor Circuit >> Inspection Procedure

Inspection Procedure

  1. INSPECT FUSE (D-IG1-3) 
    1. Remove the D-IG1-3 fuse from the driver side junction block.
    2. Measure the resistance of the fuse.

    Standard resistance 

    RESISTANCE REFERENCE CHART

    Tester Connection Condition Specified Condition
    D-IG1-3 fuse Always Below 1 Ω

    NG: REPLACE FUSE 

    OK: Go to Next Step 

  2. CHECK HARNESS AND CONNECTOR (INFRARED RAY SENSOR - BODY GROUND AND BATTERY) 
    1. Disconnect the X13 infrared ray sensor connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE CHART

      Tester Connection Condition Specified Condition
      X13-1 (E) - Body ground Always 10 kΩ or higher
    3. Measure the voltage according to the value(s) in the table below.

    Standard voltage 

    VOLTAGE REFERENCE CHART

    Tester Connection Switch Condition Specified Condition
    X13-5 (IG) - Body ground Engine switch on (IG) 11 to 14 V
    Engine switch off Below 1 V
    Fig 1: Identifying X13 Infrared Ray Sensor Connector Terminal
    G04950445Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE INFRARED RAY SENSOR  (See INFRARED RAY SENSOR )

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