DTC B242E: Open in IG Circuit [10/2018 - ]: Description

The No. 1 headlight ECU sub-assembly operates using the power source voltage input from the IG terminal and ECUB terminal.

The IG terminal power source voltage is supplied by turning the IG1-NO. 1 relay to ON.

The No. 1 headlight ECU sub-assembly receives IG ON signals from the main body ECU (multiplex network body ECU) via CAN communication, compares the IG ON signal and the power source voltage supply condition of the IG terminal and monitors the result.

AFS*1 OR HL AUTOLEVELING*2

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from
B242E	Open in IG Circuit	Detection condition: Ignition switch ON Malfunction status: When the IG terminal power source voltage is 0 V (ignition switch off), IG ON signals from the main body ECU (multiplex network body ECU) via CAN communication are continuously received Malfunction duration: 10 seconds or more	No. 1 headlight ECU sub-assembly LH Harness or connector	AFS

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B242E

Open in IG Circuit

Detection condition:

Ignition switch ON

Malfunction status:

When the IG terminal power source voltage is 0 V (ignition switch off), IG ON signals from the main body ECU (multiplex network body ECU) via CAN communication are continuously received

Malfunction duration:

10 seconds or more

No. 1 headlight ECU sub-assembly LH
Harness or connector

AFS

AFS (SUB)*1 OR HL AUTOLEVELING (SUB)*2

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from
B242E	Open in IG Circuit	Detection condition: Ignition switch ON Malfunction status: When the IG terminal power source voltage is 0 V (ignition switch off), IG ON signals from the main body ECU (multiplex network body ECU) via CAN communication are continuously received Malfunction duration: 10 seconds or more	No. 1 headlight ECU sub-assembly RH Harness or connector	AFS (Sub)