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Home >> Toyota >> 2020 >> RAV4 XLE, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 44 (Lighting System (Ext) - Diagnostic Codes & Circuit Tests (1 Of 2)) >> Lighting System >> DTC B2439-00: Headlight LH Circuit; DTC B243A-00: Headlight RH Circuit [10/2023 - ] >> Procedure

DTC B2439-00: Headlight LH Circuit; DTC B243A-00: Headlight RH Circuit [10/2023 - ]: Procedure

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  1. CLEAR DTC 
    1. Clear the DTCs.

      Body Electrical > Main Body > 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 (READY).
    3. Operate the light control switch to turn on the low beam headlights and wait 10 seconds or more.
    4. Turn the Techstream on.
    5. Enter the following menus: Body Electrical / Main Body / Trouble Codes.
    6. Check for DTCs.

      Body Electrical > Main Body > Trouble Codes 

      OK

      DTC B2430 and B2431 are not output.

      Result

      Result Proceed to
      OK A
      NG (DTC B2430 is output) B
      NG (DTC B2431 is output) C

    Result: 

    A 

    USE SIMULATION METHOD TO CHECK 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]

    Result: 

    C 

    See step  18

    Result: 

    B 

    See step  3

  3. CHECK VEHICLE TYPE 

    Result

    Result Proceed to
    Turn Light for Bulb Type A
    Turn Light for LED Type B

    Result: 

    B 

    See step  9

    Result: 

    A 

    See step  4

  4. CHECK HEADLIGHT ASSEMBLY LH (LO TERMINAL VOLTAGE) 
    1. Disconnect the headlight assembly LH connector.
      GTY1119778Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Headlight Assembly LH)
    2. Measure the voltage according to the value (s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A99-1 (LO) - Body ground Light control switch in HEAD position 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  8

    Result: 

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - BODY GROUND) 
    1. Disconnect the headlight assembly LH connector.
      GTY1119779Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Headlight Assembly LH)
    2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A99-6 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. CHECK HEADLIGHT ASSEMBLY LH (S TERMINAL VOLTAGE) 
    1. Disconnect the headlight assembly LH connector.
      GTY1119780Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Headlight Assembly LH)
    2. Measure the voltage according to the value (s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A99-4 (S) - Body ground Ignition switch ON 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT ASSEMBLY LH 

    Refer to REMOVAL [12/2021 - ]

    Result: 

    NG 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) 
    1. Disconnect the A99 headlight assembly LH connector.
    2. Disconnect the G43 main body ECU (multiplex network body ECU) connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A99-4 (S) - G43-14 (LLEW) Always Below 1 Ω
      A99-4 (S) or G43-14 (LLEW) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

    Refer to REMOVAL [10/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  8. CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT ASSEMBLY LH) 
    1. Remove the H-LP LH relay.
    2. Disconnect the A99 headlight assembly LH connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 (H-LP LH relay) - A99-1 (LO) Always Below 1 Ω
      3 (H-LP LH relay) or A99-1 (LO) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    See step  14

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  9. CHECK HEADLIGHT ASSEMBLY LH (LO TERMINAL VOLTAGE) 
    1. Disconnect the headlight assembly LH connector.
      GTY1122276Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Headlight Assembly LH)
    2. Measure the voltage according to the value (s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A98-1 (LO) - Body ground Light control switch in HEAD position 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  13

    Result: 

    OK 

    See step  10

  10. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - BODY GROUND) 
    1. Disconnect the headlight assembly LH connector.
      GTY1121651Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Headlight Assembly LH)
    2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A98-8 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  11

  11. CHECK HEADLIGHT ASSEMBLY LH (S TERMINAL VOLTAGE) 
    1. Disconnect the headlight assembly LH connector.
      GTY1121648Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Headlight Assembly LH)
    2. Measure the voltage according to the value (s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A98-5 (S) - Body ground Ignition switch ON 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT ASSEMBLY LH 

    Refer to REMOVAL [12/2021 - ]

    Result: 

    NG 

    See step  12

  12. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) 
    1. Disconnect the A98 headlight assembly LH connector.
    2. Disconnect the G43 main body ECU (multiplex network body ECU) connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A98-5 (S) - G43-14 (LLEW) Always Below 1 Ω
      A98-5 (S) or G43-14 (LLEW) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

    Refer to REMOVAL [10/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  13. CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT ASSEMBLY LH) 
    1. Remove the H-LP LH relay.
    2. Disconnect the A98 headlight assembly LH connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 (H-LP LH relay) - A98-1 (LO) Always Below 1 Ω
      3 (H-LP LH relay) or A98-1 (LO) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  14

  14. INSPECT H-LP LH RELAY 
    1. Remove the H-LP LH relay.
    2. Inspect the H-LP LH relay.

      Refer to ON-VEHICLE INSPECTION [02/2019 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE H-LP LH RELAY 

    Result: 

    OK 

    See step  15

  15. CHECK HARNESS AND CONNECTOR (POWER SOURCE - H-LP LH RELAY) 
    1. Remove the H-LP LH relay.
    2. Measure the voltage according to the value (s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      2 (H-LP LH relay) - Body ground Ignition switch off 11 to 14 V
      5 (H-LP LH relay) - Body ground Ignition switch off 11 to 14 V
      GTY510431Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to H-LP LH Relay)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  16

  16. CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 
    1. Remove the H-LP LH relay.
    2. Disconnect the 4F instrument panel junction block assembly connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 (H-LP LH relay) - 4F-31 Always Below 1 Ω
      1 (H-LP LH relay) or 4F-31 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  17

  17. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    GTY895502Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Component without harness connected
    (Instrument Panel Junction Block Assembly)    		 - -
    1. Remove the instrument panel junction block assembly.

      Refer to REMOVAL [10/2023 - ]

    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      4F-31 - A-15 (HRLY) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

    Refer to REMOVAL [10/2023 - ]

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    Refer to REMOVAL [10/2023 - ]

  18. CHECK VEHICLE TYPE 

    Result

    Result Proceed to
    Turn Light for Bulb Type A
    Turn Light for LED Type B

    Result: 

    B 

    See step  24

    Result: 

    A 

    See step  19

  19. CHECK HEADLIGHT ASSEMBLY RH (LO TERMINAL VOLTAGE) 
    1. Disconnect the headlight assembly RH connector.
      GTY1121884Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Headlight Assembly RH)
    2. Measure the voltage according to the value (s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A97-1 (LO) - Body ground Light control switch in HEAD position 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  23

    Result: 

    OK 

    See step  20

  20. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - BODY GROUND) 
    1. Disconnect the headlight assembly RH connector.
      GTY1121883Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Headlight Assembly RH)
    2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A97-6 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  21

  21. INSPECT HEADLIGHT ASSEMBLY RH (S TERMINAL VOLTAGE) 
    1. Disconnect the headlight assembly RH connector.
      GTY1119776Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Headlight Assembly RH)
    2. Measure the voltage according to the value (s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A97-4 (S) - Body ground Ignition switch ON 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT ASSEMBLY RH 

    Refer to REMOVAL [12/2021 - ]

    Result: 

    NG 

    See step  22

  22. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) 
    1. Disconnect the A97 headlight assembly RH connector.
    2. Disconnect the G43 main body ECU (multiplex network body ECU) connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A97-4 (S) - G43-15 (RLEW) Always Below 1 Ω
      A97-4 (S) or G43-15 (RLEW) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

    Refer to REMOVAL [10/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  23. CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - HEADLIGHT ASSEMBLY RH) 
    1. Remove the H-LP RH relay.
    2. Disconnect the A97 headlight assembly RH connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 (H-LP RH relay) - A97-1 (LO) Always Below 1 Ω
      3 (H-LP RH relay) or A97-1 (LO) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    See step  29

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  24. CHECK HEADLIGHT ASSEMBLY RH (LO TERMINAL VOLTAGE) 
    1. Disconnect the headlight assembly RH connector.
      GTY1121647Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Headlight Assembly RH)
    2. Measure the voltage according to the value (s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A96-1 (LO) - Body ground Light control switch in HEAD position 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  28

    Result: 

    OK 

    See step  25

  25. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - BODY GROUND) 
    1. Disconnect the headlight assembly RH connector.
      GTY1122275Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Headlight Assembly RH)
    2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A96-8 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  26

  26. CHECK HEADLIGHT ASSEMBLY LH (S TERMINAL VOLTAGE) 
    1. Disconnect the headlight assembly RH connector.
      GTY1121646Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Headlight Assembly RH)
    2. Measure the voltage according to the value (s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A96-5 (S) - Body ground Ignition switch ON 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT ASSEMBLY LH 

    Refer to REMOVAL [12/2021 - ]

    Result: 

    NG 

    See step  27

  27. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) 
    1. Disconnect the A96 headlight assembly RH connector.
    2. Disconnect the G43 main body ECU (multiplex network body ECU) connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A96-5 (S) - G43-14 (LLEW) Always Below 1 Ω
      A96-5 (S) or G43-14 (LLEW) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

    Refer to REMOVAL [10/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  28. CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT ASSEMBLY RH) 
    1. Remove the H-LP RH relay.
    2. Disconnect the A96 headlight assembly RH connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 (H-LP RH relay) - A96-1 (LO) Always Below 1 Ω
      3 (H-LP RH relay) or A96-1 (LO) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  29

  29. INSPECT H-LP RH RELAY 
    1. Remove the H-LP RH relay.
    2. Inspect the H-LP RH relay.

      Refer to ON-VEHICLE INSPECTION [02/2019 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE H-LP RH RELAY 

    Result: 

    OK 

    See step  30

  30. CHECK HARNESS AND CONNECTOR (POWER SOURCE - H-LP RH RELAY) 
    1. Remove the H-LP RH relay.
    2. Measure the voltage according to the value (s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      2 (H-LP RH relay) - Body ground Ignition switch off 11 to 14 V
      5 (H-LP RH relay) - Body ground Ignition switch off 11 to 14 V
      GTY510431Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to H-LP RH Relay)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  31

  31. CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) 
    1. Remove the H-LP RH relay.
    2. Disconnect the G44 main body ECU (multiplex network body ECU) connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 (H-LP RH relay) - G44-12 (HRY2) Always Below 1 Ω
      1 (H-LP RH relay) or G44-12 (HRY2) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

    Refer to REMOVAL [10/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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