DTC B242C: Right Headlight ECU Malfunction; DTC B242D: Left Headlight ECU Malfunction [06/2018 - ]: 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 LH or headlight ECU sub-assembly RH stores a DTC if it detects an internal malfunction.
FOR LED TYPE TURN SIGNAL LIGHT
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from |
|---|---|---|---|---|
| B242C | Right Headlight ECU Malfunction | Detection condition:
Malfunction status:
Malfunction duration:
|
Headlight ECU sub-assembly RH | AFS (Sub) |
| B242D | Left Headlight ECU Malfunction | Detection condition:
Malfunction status:
Malfunction duration:
|
Headlight ECU sub-assembly LH | AFS |
FOR BULB TYPE TURN SIGNAL LIGHT
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from |
|---|---|---|---|---|
| B242C | Right Headlight ECU Malfunction | Detection condition:
Malfunction status:
Malfunction duration:
|
Headlight ECU sub-assembly RH | HL AutoLeveling (Sub) |
| B242D | Left Headlight ECU Malfunction | Detection condition:
Malfunction status:
Malfunction duration:
|
Headlight ECU sub-assembly LH | HL AutoLeveling |