Ambient Light Sensor: Testing and Inspection

LIGHTING (EXT): AUTOMATIC LIGHT CONTROL SENSOR: ON-VEHICLE INSPECTION

ON-VEHICLE INSPECTION

1. INSPECT AUTOMATIC LIGHT CONTROL SENSOR





(a) Check the power source circuit and ground circuit.
(1) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





(2) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





(b) Check the waveform.





(1) Check the waveform according to the value(s) in the table below.

Standard Waveform:





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