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Home >> Toyota >> 2021 >> RAV4 Limited, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Lighting System (W/O Headlight Ecu) - Diagnostic Codes & Circuit Tests >> LIGHTING SYSTEM (w/o Headlight ECU) >> DTC B2430: LED Headlight LH; DTC B2431: LED Headlight RH [02/2019 - 12/2021] >> Description

DTC B2430: LED Headlight LH; DTC B2431: LED Headlight RH [02/2019 - 12/2021]: Description

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

Malfunction Status: 
  1. Any of the following conditions is met:
    • Headlight unit assembly LH malfunction
    • Headlight unit assembly LH power source and signal malfunction

Malfunction Time: 
  1. 10 seconds or more
  • Headlight unit 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: 
  1. All of the following conditions are met:
    • Ignition switch ON (READY)
    • Low beam headlights on

Malfunction Status: 
  1. Any of the following conditions is met:
    • Headlight unit assembly RH malfunction
    • Headlight unit assembly RH power source and signal malfunction

Malfunction Time: 
  1. 10 seconds or more
  • Headlight unit assembly RH
  • H-LP RH relay
  • Main body ECU (multiplex network body ECU)
  • Harness or connector
 Main Body
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