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Home >> Toyota >> 2013 >> Prius Plug-in >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 129 (Lighting System (Diagnostic Codes & Circuit Tests) (Except Plug-In)) >> Lighting System >> DTC B1244: Light Sensor Circuit Malfunction >> Description
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DTC B1244: Light Sensor Circuit Malfunction: Description

WARNING: This page is about a different variant/trim than selected.

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)