DTC B242F: Open in B Power Line [07/2019 - 10/2019]: Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. 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 power source voltage of the ECUB terminal is supplied when the main body ECU (multiplex network body ECU) turns the ECUB power supply relay (H-LP LH relay and H-LP RH relay) to ON.
The headlight ECU sub-assembly compares the power source voltage supply condition of the IG terminal and ECUB terminal and monitors the result.
AFS*1 OR HL AUTOLEVELING*2
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from |
|---|---|---|---|---|
| B242F | Open in B Power Line | 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 |
|---|---|---|---|---|
| B242F | Open in B Power Line | 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