DTC B2430: LED Headlight LH; DTC B2431: LED Headlight RH [12/2021 - 11/2024]: Description

WARNING: This page is about a different car, the 2025 Toyota RAV4, 2024 Toyota RAV4, 2023 Toyota RAV4, and 2022 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

These DTCs are stored when the low beam headlights do not illuminate, or a communication malfunction is detected between the light control LED ECU and main body ECU (multiplex network body ECU).

HINT:

DTC B2430 or DTC B2431 may also be stored if a headlight cooling fan is malfunctioning. In this case, the light control LED ECU will dim or turn off the malfunctioning low beam headlight.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from
B2430	LED Headlight LH	Detection condition: All of the following conditions are met: Ignition switch ON (READY) Low beam headlights on Malfunction Status: Any of the following conditions is met: Headlight assembly LH malfunction Headlight assembly LH power source and signal malfunction Malfunction Time: 10 seconds or more	Headlight assembly LH H-LP LH relay Instrument panel junction block assembly Main body ECU (multiplex network body ECU) Harness or connector	Main Body
B2431	LED Headlight RH	Detection condition: All of the following conditions are met: Ignition switch ON (READY) Low beam headlights on Malfunction Status: Any of the following conditions is met: Headlight assembly RH malfunction Headlight assembly RH power source and signal malfunction Malfunction Time: 10 seconds or more	Headlight assembly RH H-LP RH relay Main body ECU (multiplex network body ECU) Harness or connector	Main Body

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B2430

LED Headlight LH

Detection condition:

All of the following conditions are met:
- Ignition switch ON (READY)
- Low beam headlights on

Malfunction Status:

Any of the following conditions is met:
- Headlight assembly LH malfunction
- Headlight assembly LH power source and signal malfunction

Malfunction Time:

10 seconds or more

Headlight assembly LH
H-LP LH relay
Instrument panel junction block assembly
Main body ECU (multiplex network body ECU)
Harness or connector

Main Body

B2431

LED Headlight RH

Detection condition:

All of the following conditions are met:
- Ignition switch ON (READY)
- Low beam headlights on

Malfunction Status:

Any of the following conditions is met:
- Headlight assembly RH malfunction
- Headlight assembly RH power source and signal malfunction

Malfunction Time:

10 seconds or more

Headlight assembly RH
H-LP RH relay
Main body ECU (multiplex network body ECU)
Harness or connector

Main Body