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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Lighting System (W/ AFS) - Diagnostic Codes (1 Of 2) >> LIGHTING SYSTEM (w/ AFS) >> DTC B2424: Headlight Beam Level Control Motor LH Lost Communication; DTC B2425: Headlight Beam Level Control Motor RH Lost Communication [12/2019 - 11/2023] >> Description

DTC B2424: Headlight Beam Level Control Motor LH Lost Communication; DTC B2425: Headlight Beam Level Control Motor RH Lost Communication [12/2019 - 11/2023]: Description

Each headlight ECU sub-assembly and headlight swivel and leveling motor communicate via LIN communication.

The headlight swivel and leveling motor operates according to power supplied and automatic headlight beam level control signals from its respective headlight ECU sub-assembly and sends its operating state to the headlight ECU sub-assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from
B2424 Headlight Beam Level Control Motor LH Lost Communication Detection condition: 
  1. The ignition switch is ON.

Malfunction status: 

  1. LIN communication error

Malfunction duration: 

  1. 10 seconds or more
  • Harness or connector
  • Headlight ECU sub-assembly LH
  • Headlight ECU sub-assembly RH
  • Headlight assembly LH
  • Headlight assembly RH
AFS
B2425 Headlight Beam Level Control Motor RH Lost Communication Detection condition: 
  1. The ignition switch is ON.

Malfunction status: 

  1. LIN communication error

Malfunction duration: 

  1. 10 seconds or more
  • Harness or connector
  • Headlight ECU sub-assembly RH
  • Headlight ECU sub-assembly LH
  • Headlight assembly RH
  • Headlight assembly LH
AFS