Toyota Corolla Cross: Steering Knuckle

 Headlight Control Module (Sub) System Internal Failure (B242C04,B242D04)

DESCRIPTION The headlight ECU sub-assembly LH or headlight ECU sub-assembly RH stores a DTC if it detects an internal malfunction. DTC No. Detection Item DTC Detection Condition Trouble Area B242C04 Headlight Control Module (Sub) System Internal Failure Detection condition:

 Check Bus 4 Line

DESCRIPTION Symptom Trouble Area There are ECUs or sensors that display a communication stop on the bus diagnostic screen. Or, there are ECUs or sensors that display communication stop history on the "Detail" screen. CAN main