AUTOMATIC LIGHT CONTROL SENSOR ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT AUTOMATIC LIGHT CONTROL SENSOR


    1. Disconnect the automatic light control sensor connector.

    2. A01X2M8E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (Automatic Light Control Sensor)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F91-2 (CLTE) - Body ground Always Below 1 Ω
      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F91-1 (CLTB) - F91-2 (CLTE) Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V

      If the result not as specified, repair or replace the wire harness.

    3. Reconnect the automatic light control sensor connector.

    4. A01WZ0TE02

      Connect an oscilloscope to the automatic light control sensor connector.

    5. A01WZG3E01
      Text in Illustration
      *a

      Component with harness connected

      (Automatic Light Control Sensor)

      Check the waveform.

      Waveform
      Tester Connection Tool Setting Condition Specified Condition
      F91-4 (CLTS) - F91-2 (CLTE) 2 V/DIV., 10 msec./ DIV. Engine switch on (IG), Light control switch in AUTO Correct waveform is as shown

      Tech Tips

      The communication waveform changes according to the surrounding brightness.

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