Ambient Light Sensor: Testing and Inspection

LIGHTING SYSTEM: Automatic Light Control Sensor Circuit

Automatic Light Control Sensor Circuit

DESCRIPTION

The multiplex network body ECU receives a signal from the automatic light control sensor.

HINT: A DTC code is output when the automatic light control sensor is malfunctioning or there is an open or short circuit in the automatic light control sensor (Lighting System).

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK BODY ECU - AUTOMATIC LIGHT CONTROL SENSOR)





(a) Disconnect the automatic light control sensor connector and B6 connector of the multiplex network body ECU.
(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 INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
(a) Reconnect the automatic light control sensor connector and B6 connector of the multiplex network body ECU.





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





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