On-Vehicle Inspection

INSPECT AUTOMATIC LIGHT CONTROL SENSOR

Connect the voltmeter's positive (+) lead to terminal M2-6 and the negative (-) lead to terminal M2-3.

Measure the voltage of the connector.

Standard voltage

VOLTAGE SPECIFIED CONDITIONS

Tester Connection	Switch Condition	Specified Condition
M2-6 (CLTB) - M2-3 (CLTE)	Engine switch on (IG)	11 to 14 V

Fig 1: Identifying Automatic Light Control Sensor Connector Terminals

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Measure the resistance of the connector.

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Condition	Specified Condition
M2-3 (CLTE) - Body ground	Always	Below 1 Ω

Check the waveform of the M2 sensor connector.

Wave form

WAVEFORM REFERENCE CHART

Tester Connection	Switch Condition	Specified Condition	Tester Range
M2-3 (CLTE) - M2-5 (CLTS)	Engine switch on (IG), Headlight dimmer switch on AUTO	Correct waveform is as shown	5 V/DIV., 5 msec./DIV.

Fig 2: Identifying Waveform Of M2 Sensor Connector

HINT:

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

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