DTC B242E-14: IG Circuit Short to Ground or Open [11/2023 - ]: Description

The headlight ECU sub-assembly operates using the power source voltage input from the IGR terminal and ECUB terminal.

The IG terminal power source voltage is supplied by turning the IGR relay to ON.

The headlight ECU sub-assembly receives ignition switch ON signals from the main body ECU (multiplex network body ECU) via CAN communication, compares the ignition switch ON signal and the power source voltage supply condition of the IGR terminal and monitors the result.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from
B242E-14	IG Circuit Short to Ground or Open	Detection condition: The ignition switch is ON Malfunction status: When the IGR 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	Headlight ECU sub-assembly LH Harness or connector	Headlight Control

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B242E-14

IG Circuit Short to Ground or Open

Detection condition:

The ignition switch is ON

Malfunction status:

When the IGR 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

Headlight ECU sub-assembly LH
Harness or connector

Headlight Control

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from
B242E-14	IG Circuit Short to Ground or Open	Detection condition: The ignition switch is ON Malfunction status: When the IGR 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	Headlight ECU sub-assembly RH Harness or connector	Headlight Control (Sub)