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Home >> Toyota >> 2014 >> Prius Two >> Repair and Diagnosis (Single Page) >> External Pages >> Different variant/trim >> Section 148 (Automatic Beam Level Control System (Diagnostic Codes & Circuit Tests) (Plug-In)) >> Automatic Headlight Beam Level Control System >> DTC B2420: HL AutoLeveling ECU Failure [10/2013 - ] >> Procedure
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DTC B2420: HL AutoLeveling ECU Failure [10/2013 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK FOR DTC 
    1. Clear the DTCs. Refer to DTC CHECK / CLEAR [10/2013 - ] .
    2. Check for DTCs. Refer to DTC CHECK / CLEAR [10/2013 - ] .

      OK

      DTC B2420 is not output.

    NG → See step   2 

    OK → See step   3 

  2. REPLACE HEADLIGHT LEVELING ECU ASSEMBLY. Refer to  REMOVAL [10/2013 - ] 
  3. USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2013 - ]