Ambient Light Sensor: Testing and Inspection

LIGHTING (EXT): AUTOMATIC LIGHT CONTROL SENSOR: INSPECTION

INSPECTION

1. INSPECT AUTOMATIC LIGHT CONTROL SENSOR





(a) Disconnect the automatic light control sensor connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:





If the result is not as specified, there is a malfunction on the wire harness side.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





If the result is not as specified, there is a malfunction on the wire harness side.





(d) Reconnect the automatic light control sensor connector.
(e) Connect an oscilloscope to the automatic light control sensor connector.





(f) Check the waveform.
OK:





If the result is not as specified, replace the automatic light control sensor.
HINT: If the ambient light becomes brighter, width A becomes narrower.