ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT AUTOMATIC LIGHT CONTROL SENSOR
(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) Connect the G23 automatic light control sensor connector. (d) Connect an oscilloscope to terminals G23-2 (CLTE) and G23-4 (CLTS) of the automatic light control sensor connector and check the waveform. 
OK:
HINT: The communication waveform changes according to the surrounding brightness. If the result is not as specified, the automatic light control sensor may be malfunctioning. | ||||||||||||||||||||||||||||||||||||||||||
Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Main Body Ecu: Installation
INSTALLATION CAUTION / NOTICE / HINT NOTICE: Before replacing the main body ECU (multiplex network body ECU), refer to Registration. for Gasoline Model: Click here for HV Model: Click here After the main body ECU (multiplex network body ECU) has been replaced, the automatic light control system will ...
