Automatic Light Control Sensor Circuit

LIGHTING (EXT): LIGHTING SYSTEM: Automatic Light Control Sensor Circuit

Automatic Light Control Sensor Circuit

DESCRIPTION

The daytime running light relay receives the signal from the automatic light control sensor.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (DAYTIME RUNNING LIGHT RELAY - AUTOMATIC LIGHT CONTROL SENSOR)
(a) Disconnect the F1 automatic light control sensor connector and E42 daytime running light relay connector.




(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. INSPECT DAYTIME RUNNING LIGHT RELAY




(a) Reconnect the E42 daytime running light relay connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:






NG -- REPLACE DAYTIME RUNNING LIGHT RELAY
OK -- Continue to next step.

3. INSPECT AUTOMATIC LIGHT CONTROL SENSOR




(a) Reconnect the F1 automatic light control sensor connector.
(b) Connect an oscilloscope to the automatic light control sensor connector.




(c) Check the waveform.
OK:





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

NG -- REPLACE AUTOMATIC LIGHT CONTROL SENSOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE