Ambient Light Sensor: Testing and Inspection

LIGHTING (EXT): AUTOMATIC LIGHT CONTROL SENSOR: 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.