DTC B242E: Open in IG Circuit [06/2018 - 07/2019]: Description
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2024 Lexus ES 350, 2024 Lexus ES 250, 2023 Lexus ES 350, 2023 Lexus ES 250, and 2022 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.
The 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 headlight ECU sub-assembly receives engine switch on (IG) signals from the main body ECU (multiplex network body ECU) via CAN communication, compares the engine switch on (IG) 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:
Malfunction status:
Malfunction duration:
|
|
Headlight ECU sub-assembly LH |
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:
Malfunction status:
Malfunction duration:
|
|
Headlight ECU sub-assembly RH |
- *1: for LED Type Turn Signal Light
- *2: for Bulb Type Turn Signal Light