DTC B1244: Light Sensor Circuit Malfunction: Description

The automatic light control sensor detects ambient light, converts it into an electrical signal, and outputs it to the main body ECU (multiplex network body ECU). The main body ECU (multiplex network body ECU) turns on or off the headlights and taillights according to the signal.

DTC No.	DTC Detecting Condition	Trouble Area
B1244	Malfunction in automatic light control sensor Open or short in automatic light control sensor circuit	Automatic light control sensor Harness or connector Main body ECU (multiplex network body ECU)