Lexus IS250 IS220d GSE20 ALE20 - LIGHTING

AUTOMATIC LIGHT CONTROL SENSOR - ON-VEHICLE INSPECTION

1. INSPECT AUTOMATIC LIGHT CONTROL SENSOR
Automatic Light Control Sensor - On-Vehicle Inspection. LIGHTING. Lexus IS250 IS220d GSE20 ALE20

Disconnect the K1 sensor connector.

Connect the voltmeter's positive (+) lead to terminal 6 and the negative (-) lead to terminal 3.

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

  • Standard voltage:
  • Tester ConnectionConditionSpecified Condition
    K1-3 (CTLE) - K1-6 (CTLB)Engine switch on (IG)10 to 14 V

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

  • Standard resistance:
  • Tester ConnectionConditionSpecified Condition
    K1-3 (CTLE) - Body groundAlwaysBelow 1 Ω

Reconnect the K1 sensor connector.

Automatic Light Control Sensor - On-Vehicle Inspection. LIGHTING. Lexus IS250 IS220d GSE20 ALE20

Check the waveform of the K1 sensor connector.

  • Tester ConnectionConditionSpecified ConditionTester Range
    K1-3 (CTLE) - K1-5 (CTLS)Engine switch on (IG), Headlight dimmer switch in AUTOCorrect waveform is as shown5 V/DIV., 5 ms./DIV.
  • HINT:
  • If the ambient light becomes brighter, width A becomes narrower.

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