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HOMESERVICE MANUALSTOYOTA201886 GT, STANDARD TRANSREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTHEADLIGHTSLIGHTING SYSTEM (EXT) (SERVICE INFORMATION)AUTOMATIC LIGHT CONTROL SENSORINSPECTION [06/2016 - ]PROCEDURE
2018 Toyota 86 GT, Standard Trans

Inspection [06/2016 - ]: Procedure

2018 Toyota 86 GT, Standard TransSECTION Procedure
  1. INSPECT AUTOMATIC LIGHT CONTROL SENSORΒ 
    1. Disconnect the D45 automatic light control sensor connector.
      GTY703161Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      D45-3 (CLTB) - D45-6 (CLTE) Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V

      Standard Resistance

      Tester Connection Condition Specified Condition
      D45-6 (CLTE) - Body ground Always Below 1 Ξ©
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Automatic Light Control Sensor)

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

    3. Reconnect the D45 automatic light control sensor connector.
      GTY729005Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
    4. Connect an oscilloscope to the automatic light control sensor connector.
    5. Check the waveform.

      OK

      Tester Connection Tool Setting Switch Condition Specified Condition
      D45-4 (CLTS) - D45-6 (CLTE) 5 V/DIV., 5 ms./DIV Ignition switch ON, light control switch in AUTO position Correct waveform is as shown
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Automatic Light Control Sensor)

      HINT:Β 

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

      If the result is not as specified, the automatic light control sensor may have a malfunction.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.