LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2021 >> RC F Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting System (Ext) - Diagnostic Codes & Circuit Tests >> Lighting System >> DTC B1244: Light Sensor Circuit [03/2019 - ] >> Description

DTC B1244: Light Sensor Circuit [03/2019 - ]: Description

The automatic light control sensor detects ambient light. The sensor creates an electrical signal based on the amount of light detected, and sends the signal 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. Detection Item DTC Detection Condition Trouble Area DTC Output from
B1244 Light Sensor Circuit Either of the following conditions is met:
  • 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)
Main Body