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Automatic Light Control Sensor: Inspection

  1. INSPECT AUTOMATIC LIGHT CONTROL SENSOR (for Manual Air Conditioning System) 
    1. Disconnect the F2 automatic light control sensor connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      F2-3 (CLTB) - F2-6 (CLTE) Ignition switch off Below 1 V
      Ignition switch on (IG) 10 to 14 V
      Fig 1: Identifying Automatic Light Control Sensor Connector Terminals (CLTB And CLTE)
      G05419920Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      F2-6 (CLTE) - Body ground Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the automatic light control sensor connector.
    4. Connect an oscilloscope to the automatic light control sensor connector.
      Fig 2: Identifying Automatic Light Control Sensor Connector Terminals (CLTS And CLTE)
      G05419719Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Check the waveform.

    OK 

    TESTER CONNECTION SPECIFIED CONDITION CHART

    Tester Connection Tool Setting Condition Specified Condition
    F2-6 (CLTE) - F2-4 (CLTS) 5 V/DIV., 5 ms./ DIV Ignition switch on (IG), light control switch in AUTO Correct waveform is as shown
    Fig 3: Waveform Graph
    G04980053Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    If the ambient light becomes brighter, width A becomes narrower.

    If the result is not as specified, replace the automatic light control sensor.

  2. INSPECT AUTOMATIC LIGHT CONTROL SENSOR (for Automatic Air Conditioning System) 
    1. Disconnect the F1 automatic light control sensor connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      F1-6 (CLTB) - F1-3 (CLTE) Ignition switch off Below 1 V
      Ignition switch on (IG) 10 to 14 V
      Fig 4: Identifying Automatic Light Control Sensor Connector Terminals (CLTB And CLTE)
      G05419923Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      F1-3 (CLTE) - Body ground Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the automatic light control sensor connector.
    4. Connect an oscilloscope to the automatic light control sensor connector.
      Fig 5: Identifying Automatic Light Control Sensor Connector Terminals (CLTS And CLTE)
      G05419721Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Check the waveform.

    OK 

    TESTER CONNECTION SPECIFIED CONDITION CHART

    Tester Connection Tool Setting Condition Specified Condition
    F1-3 (CLTE) - F1-5 (CLTS) 5 V/DIV., 5 ms./ DIV Ignition switch on (IG), light control switch in AUTO Correct waveform is as shown
    Fig 6: Waveform Graph
    G04980053Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    If the ambient light becomes brighter, width A becomes narrower.

    If the result is not as specified, replace the automatic light control sensor.

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