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Home >> Toyota >> 2022 >> RAV4 LE, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 64 (Lighting System (W/ Headlight Ecu W/O AFS) - Diagnostic Codes & Circuit Tests) >> LIGHTING SYSTEM (w/ Headlight ECU without AFS) >> DTC B243D: Left Low Beam Fan Malfunction; DTC B243E: Right Low Beam Fan Malfunction [11/2018 - 12/2021] >> Procedure

DTC B243D: Left Low Beam Fan Malfunction; DTC B243E: Right Low Beam Fan Malfunction [11/2018 - 12/2021]: Procedure

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  1. CLEAR DTC 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.
    5. Clear the DTCs.

      Body Electrical > HL AutoLeveling > Clear DTCs 

      Body Electrical > HL AutoLeveling (Sub) > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CHECK FOR DTC 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Operate the light control switch to turn on the low beam headlights and wait 30 seconds or more.
    4. Turn the Techstream on.
    5. Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.
    6. Check for DTCs.

      Body Electrical > HL AutoLeveling > Trouble Codes 

      Body Electrical > HL AutoLeveling (Sub) > 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 [11/2018 - ] 

    Result: 

    C 

    See step  5

    Result: 

    B 

    See step  3

  3. INSPECT HEADLIGHT UNIT ASSEMBLY LH 
    GTY943038Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Component without harness connected
    (to Headlight ECU Sub-assembly LH)    		 *b Component without harness connected
    (to Headlight LED Unit Assembly LH)
    1. Remove the headlight assembly LH.

      Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 12/2021]

    2. Remove the headlight LED unit assembly LH.

      Refer to DISASSEMBLY [11/2018 - 02/2019] , or refer to DISASSEMBLY [02/2019 - 08/2020] , or refer to DISASSEMBLY [08/2020 - 12/2021]

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Wiring Color Condition Specified Condition
      B-6 (FANB) - C-2 G Always Below 1 Ω
      B-15 (FANP) - C-8 L Always Below 1 Ω
      B-14 (FANG) - C-7 Y Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE HEADLIGHT UNIT ASSEMBLY LH. Refer to  DISASSEMBLY [11/2018 - 02/2019]  , or refer to  DISASSEMBLY [02/2019 - 08/2020]  , or refer to  DISASSEMBLY [08/2020 - 12/2021] 

    Result: 

    OK 

    See step  4

  4. INSPECT HEADLIGHT ECU SUB-ASSEMBLY LH 
    GTY839622Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Component without harness connected
    (to Headlight LED Unit Assembly LH)
    1. Remove the headlight assembly LH.

      Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 12/2021]

    2. Remove the headlight LED unit assembly LH.

      Refer to DISASSEMBLY [11/2018 - 02/2019] , or refer to DISASSEMBLY [02/2019 - 08/2020] , or refer to DISASSEMBLY [08/2020 - 12/2021]

    3. Connect the B headlight ECU sub-assembly LH connector.
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Wiring Color Condition Specified Condition
      C-2 - C-7 G - Y Low beam headlights on 4.75 to 5.25 V
      C-8 - C-7 L - Y Low beam headlights on 4.75 to 5.25 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT LED UNIT ASSEMBLY LH. Refer to  DISASSEMBLY [11/2018 - 02/2019]  , or refer to  DISASSEMBLY [02/2019 - 08/2020]  , or refer to  DISASSEMBLY [08/2020 - 12/2021] 

    Result: 

    NG 

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [11/2018 - 02/2019]  , or refer to  REMOVAL [02/2019 - 12/2021] 

  5. INSPECT HEADLIGHT UNIT ASSEMBLY RH 
    GTY943038Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Component without harness connected
    (to Headlight ECU Sub-assembly RH)    		 *b Component without harness connected
    (to Headlight LED Unit Assembly RH)
    1. Remove the headlight assembly RH.

      Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 12/2021]

    2. Remove the headlight LED unit assembly RH.

      Refer to DISASSEMBLY [11/2018 - 02/2019] , or refer to DISASSEMBLY [02/2019 - 08/2020] , or refer to DISASSEMBLY [08/2020 - 12/2021]

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Wiring Color Condition Specified Condition
      B-6 (FANB) - C-2 G Always Below 1 Ω
      B-15 (FANP) - C-8 L Always Below 1 Ω
      B-14 (FANG) - C-7 Y Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE HEADLIGHT UNIT ASSEMBLY RH. Refer to  DISASSEMBLY [11/2018 - 02/2019]  , or refer to  DISASSEMBLY [02/2019 - 08/2020]  , or refer to  DISASSEMBLY [08/2020 - 12/2021] 

    Result: 

    OK 

    See step  6

  6. INSPECT HEADLIGHT ECU SUB-ASSEMBLY RH 
    GTY839622Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Component without harness connected
    (to Headlight LED Unit Assembly RH)
    1. Remove the headlight assembly RH.

      Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 12/2021]

    2. Remove the headlight LED unit assembly RH.

      Refer to DISASSEMBLY [11/2018 - 02/2019] , or refer to DISASSEMBLY [02/2019 - 08/2020] , or refer to DISASSEMBLY [08/2020 - 12/2021]

    3. Connect the B headlight ECU sub-assembly RH connector.
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Wiring Color Condition Specified Condition
      C-2 - C-7 G - Y Low beam headlights on 4.75 to 5.25 V
      C-8 - C-7 L - Y Low beam headlights on 4.75 to 5.25 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT LED UNIT ASSEMBLY RH. Refer to  DISASSEMBLY [11/2018 - 02/2019]  , or refer to  DISASSEMBLY [02/2019 - 08/2020]  , or refer to  DISASSEMBLY [08/2020 - 12/2021] 

    Result: 

    NG 

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH. Refer to  REMOVAL [11/2018 - 02/2019]  , or refer to  REMOVAL [02/2019 - 12/2021] 

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