On-Vehicle Inspection

1. Connect the voltmeter's positive (+) lead to terminal M2-6 and the negative (-) lead to terminal M2-3.
2. Measure the voltage of the connector.

   Standard Voltage 

   VOLTAGE SPECIFICATION
   
   

   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 M2 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance of the connector.

   Standard Resistance 

   RESISTANCE SPECIFICATION CHART
   
   

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

4. Check the waveform of the M2 sensor connector.

Wave form 

Fig 2: Identifying Waveform

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

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

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