Ambient Light Sensor: Testing and Inspection

LIGHTING: AUTOMATIC LIGHT CONTROL SENSOR: ON-VEHICLE INSPECTION

1. INSPECT AUTOMATIC LIGHT CONTROL SENSOR (for Manual Air Conditioning System)

(a) Disconnect the E11 automatic light control sensor connector.





(b) Measure the voltage and resistance according to the value(s) in the table below.

Standard voltage:





Standard resistance:





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

(c) Reconnect the automatic light control sensor connector.

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

(e) Check the waveform.





OK:





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

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

2. INSPECT AUTOMATIC LIGHT CONTROL SENSOR (for Automatic Air Conditioning System)

(a) Disconnect the E11 automatic light control sensor connector.





(b) Measure the voltage and resistance according to the value(s) in the table below.

Standard voltage:





Standard resistance:





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

(c) Reconnect the automatic light control sensor connector.

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

(e) Check the waveform.





OK:





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

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