Automatic Light Control Sensor On-Vehicle Inspection

Body Electrical. Lexus Is250, Is220D. Gse20 Ale20
Lighting. Lexus Is250, Is220D. Gse20 Ale20

  1. INSPECT AUTOMATIC LIGHT CONTROL SENSOR

Automatic Light Control Sensor -- On-Vehicle Inspection



1. INSPECT AUTOMATIC LIGHT CONTROL SENSOR


Lexus Is250, Is220D. Gse20 Ale20.Lighting.Lighting System.Automatic Light Control Sensor On-Vehicle Inspection

  1. Disconnect the K1 sensor connector.

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

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

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

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    K1-3 (CTLE) - Body ground
    		Always
    		Below 1 Ω

  1. Reconnect the K1 sensor connector.



    Lexus Is250, Is220D. Gse20 Ale20.Lighting.Lighting System.Automatic Light Control Sensor On-Vehicle Inspection

  1. Check the waveform of the K1 sensor connector.

    Tester Connection
    		Condition
    		Specified Condition
    		Tester Range
    K1-3 (CTLE) - K1-5 (CTLS)
    		Engine switch on (IG), Headlight dimmer switch in AUTO
    		Correct waveform is as shown
    		5 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.