AUTOMATIC LIGHT CONTROL SENSOR ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT AUTOMATIC LIGHT CONTROL SENSOR


    1. Disconnect the automatic light control sensor connector.

    2. A01VKUAE02
      Text in Illustration
      *a

      Front view of wire harness connected

      (to Automatic Light Control Sensor)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      3 (CLTB) - 5 (CLTE) Ignition switch off Below 1 V
      Ignition switch on 11 to 14 V

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      5 (CLTE) -Body ground Always Below 1 Ω

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

    4. Reconnect the automatic light control sensor connector.

    5. A01VDOXE02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Automatic Light Control Sensor)

      Connect an oscilloscope to the automatic light control sensor connector.

    6. A01VER8E01

      Check the waveform.

      OK
      Tester Connection Tool Setting Condition Specified Condition
      4 (CLTS) - 5 (CLTE) 5 V/DIV., 5 ms./DIV Ignition switch ON, light control switch in AUTO Correct waveform is as shown

      Tech Tips

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

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