On-Vehicle Inspection
- INSPECT AUTOMATIC LIGHT CONTROL SENSOR
- Disconnect the Q3 automatic light control sensor connector.
- Measure the voltage and resistance according to the value(s) in the table below.
Standard voltage
TESTER CONNECTION SPECIFIED CONDITIONTester Connection Condition Specified Condition Q3-6 (CLTB) - Q3-3 (CLTE) Engine switch off Below 1 V Engine switch on (IG) 10 to 14 V Standard resistance
TESTER CONNECTION SPECIFIED CONDITIONTester Connection Specified Condition Q3-3 (CLTE) - Body ground Below 1 Ω If the result is not as specified, there is malfunction on the wire harness side.
- Reconnect the automatic light control sensor connector.
- Connect an oscilloscope to the automatic light control sensor connector.
- Check the waveform.
OK
TESTER CONNECTION SPECIFIED CONDITIONTester Connection Tool Setting Condition Specified Condition Q3-3 (CLTE) - Q3-5 (CLTS) 5 V/DIV., 5 ms./ DIV Engine switch on (IG), light control switch in AUTO Correct waveform is as shown HINT:
If the ambient light becomes brighter, width A becomes narrower.
If the result is not as specified, replace the automatic light control sensor.