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Home >> Toyota >> 2021 >> C-HR Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 6 (Lighting System - Diagnostic Codes & Circuit Tests) >> Lighting System >> DTC B243D: Left Low Beam Fan Malfunction; DTC B243E: Right Low Beam Fan Malfunction [10/2017 - 05/2018] >> Procedure

DTC B243D: Left Low Beam Fan Malfunction; DTC B243E: Right Low Beam Fan Malfunction [10/2017 - 05/2018]: Procedure

WARNING: This page is about a different car, the 2019 Toyota C-HR and 2018 Toyota C-HR. However, it is still accessible from the selected car via links, so may be relevant.
  1. CLEAR DTC 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [02/2017 - 09/2019]

      Body Electrical > HL AutoLeveling > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CHECK FOR DTC 
    1. Turn the ignition switch to ON.
    2. Operate the light control switch to turn on the low beam headlights and wait 2 minutes.
    3. Check for DTCs.

      Refer to DTC CHECK / CLEAR [02/2017 - 09/2019]

      Body Electrical > HL AutoLeveling > Trouble Codes 

      OK

      DTC B243D and B243E are not output.

      Result

      Result Proceed to
      OK A
      NG (DTC B243D is output) B
      NG (DTC B243E is output) C

    Result: 

    A 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2017 - 05/2018] 

    Result: 

    C 

    See step  6

    Result: 

    B 

    See step  3

  3. REPLACE HEADLIGHT UNIT ASSEMBLY LH (HEADLIGHT FAN LH) 
    1. Replace the headlight unit assembly LH (headlight fan LH) with a new or known good one.
      1. for Halogen Headlight: Refer to REMOVAL [10/2017 - 09/2019]
      2. for LED Headlight: Refer to REMOVAL [10/2017 - 09/2019]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. CLEAR DTC 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [02/2017 - 09/2019]

      Body Electrical > HL AutoLeveling > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  5

  5. CHECK FOR DTC 
    1. Turn the ignition switch to ON.
    2. Operate the light control switch to turn on the low beam headlights and wait 2 minutes.
    3. Check for DTCs.

      Refer to DTC CHECK / CLEAR [02/2017 - 09/2019]

      Body Electrical > HL AutoLeveling > Trouble Codes 

      OK

      DTC B243D is not output.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END (HEADLIGHT UNIT ASSEMBLY LH (HEADLIGHT FAN LH) WAS DEFECTIVE) 

    Result: 

    NG 

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [10/2017 - 09/2019] 

  6. REPLACE HEADLIGHT UNIT ASSEMBLY RH (HEADLIGHT FAN RH) 
    1. Replace the headlight unit assembly RH (headlight fan RH) with a new or known good one.
      1. for Halogen Headlight: Refer to REMOVAL [10/2017 - 09/2019]
      2. for LED Headlight: Refer to REMOVAL [10/2017 - 09/2019]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  7

  7. CLEAR DTC 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [02/2017 - 09/2019]

      Body Electrical > HL AutoLeveling > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  8

  8. CHECK FOR DTC 
    1. Turn the ignition switch to ON.
    2. Operate the light control switch to turn on the low beam headlights and wait 2 minutes.
    3. Check for DTCs.

      Refer to DTC CHECK / CLEAR [02/2017 - 09/2019]

      Body Electrical > HL AutoLeveling > Trouble Codes 

      OK

      DTC B243E is not output.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END (HEADLIGHT UNIT ASSEMBLY RH (HEADLIGHT FAN RH) WAS DEFECTIVE) 

    Result: 

    NG 

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH. Refer to  REMOVAL [10/2017 - 09/2019] 

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