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Home >> Lexus >> 2020 >> ES 300h Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 180 (Meter / Gauge System (Except Hybrid) - Diagnostic Codes (1 Of 2)) >> METER / GAUGE SYSTEM (for Gasoline Model) >> DTC B1508-19: Turn Signal/Hazard Flasher Circuit Current Above Threshold [07/2019 - 10/2019] >> Procedure

DTC B1508-19: Turn Signal/Hazard Flasher Circuit Current Above Threshold [07/2019 - 10/2019]: Procedure

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2024 Lexus ES 350, 2024 Lexus ES 250, 2023 Lexus ES 350, 2023 Lexus ES 250, and 2022 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK LIGHTS 
    1. Inspect the illumination of each turn signal light.

      Result

      Result Proceed to
      All LH turn signal lights do not blink A
      All RH turn signal lights do not blink B

    Result: 

    B 

    See step  25

    Result: 

    A 

    See step  2

  2. CONFIRM MODEL 
    1. Choose the model to be inspected.

      Result

      Result Proceed to
      For TMC Made A
      For TMMK Made B

    Result: 

    B 

    See step  5

    Result: 

    A 

    See step  3

  3. CHECK LH SIDE LIGHTS (REAR COMBINATION LIGHT LENS AND BODY LH) 
    1. Disconnect the R9 rear combination light lens and body LH connector.
    2. Operate the headlight dimmer switch assembly and check that the LH side turn signal lights other than the rear turn signal light blink.

      HINT: 

      If the LH side turn signal lights blink, the rear combination light lens and body LH is malfunctioning.

      Result

      Result Proceed to
      LH side turn signal lights blink A
      LH side turn signal lights do not blink B

    Result: 

    A 

    REPLACE REAR COMBINATION LIGHT LENS AND BODY LH. Refer to  REMOVAL [06/2018 - 08/2021] 

    Result: 

    B 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT LENS AND BODY LH OR COMBINATION METER ASSEMBLY - BODY GROUND) 
    1. Disconnect the G16 combination meter assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R9-3 (TRN) or G16-11 (TRNL) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    See step  7

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  5. CHECK LH SIDE LIGHTS (REAR COMBINATION LIGHT ASSEMBLY LH) 
    1. Disconnect the R9 rear combination light assembly LH connector.
    2. Operate the headlight dimmer switch assembly and check that the LH side turn signal lights other than the rear turn signal light blink.

      HINT: 

      If the LH side turn signal lights blink, the rear combination light assembly LH is malfunctioning.

      Result

      Result Proceed to
      LH side turn signal lights blink A
      LH side turn signal lights do not blink B

    Result: 

    A 

    REPLACE REAR COMBINATION LIGHT ASSEMBLY LH. Refer to  REMOVAL [06/2018 - 08/2021] 

    Result: 

    B 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH OR COMBINATION METER ASSEMBLY - BODY GROUND) 
    1. Disconnect the G16 combination meter assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R9-3 (TRN) or G16-11 (TRNL) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

  7. CONFIRM MODEL 
    1. Choose the model to be inspected.

      Result

      Result Proceed to
      w/ Seat Position Memory A
      w/o Seat Position Memory B

    Result: 

    B 

    See step  17

    Result: 

    A 

    See step  8

  8. CHECK LH SIDE LIGHTS (OUTER REAR VIEW MIRROR ASSEMBLY LH) 
    1. Connect the R9 rear combination light assembly LH connector.
    2. Connect the G16 combination meter assembly connector.
    3. Disconnect the z20 outer rear view mirror assembly LH connector.
    4. Operate the headlight dimmer switch assembly and check that the LH side turn signal lights other than the side turn signal light blink.

      HINT: 

      If the LH side turn signal lights blink, the outer rear view mirror assembly LH is malfunctioning.

      Result

      Result Proceed to
      LH side turn signal lights blink A
      LH side turn signal lights do not blink B

    Result: 

    B 

    See step  10

    Result: 

    A 

    See step  9

  9. INSPECT SIDE TURN SIGNAL LIGHT ASSEMBLY LH 
    1. Remove the side turn signal light assembly LH.

      Refer to REMOVAL [06/2018 - 09/2022]

    2. Inspect the side turn signal light assembly LH.

      Refer to INSPECTION [06/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE OUTER MIRROR RETRACTOR LH. Refer to  DISASSEMBLY [06/2018 - ] 

    Result: 

    NG 

    REPLACE SIDE TURN SIGNAL LIGHT ASSEMBLY LH. Refer to  REMOVAL [06/2018 - 09/2022] 

  10. CHECK LH SIDE LIGHTS (HEADLIGHT ASSEMBLY LH) 
    1. Connect the z20 outer rear view mirror assembly LH connector.
    2. Disconnect the A11 headlight assembly LH connector.*1
    3. Disconnect the A78 headlight assembly LH connector.*2
    4. Operate the headlight dimmer switch assembly and check that the LH side turn signal lights other than the headlight turn signal light blink.

      HINT: 

      If the LH side turn signal lights blink, the headlight assembly LH is malfunctioning.

      1. *1: for TMMK Made Before Sep. 2019 Production
      2. *2: for TMC Made or TMMK Made From Sep. 2019 Production

      Result

      Result Proceed to
      LH side turn signal lights blink A
      LH side turn signal lights do not blink B

    Result: 

    B 

    See step  14

    Result: 

    A 

    See step  11

  11. CHECK LH SIDE LIGHTS (HEADLIGHT ECU SUB-ASSEMBLY LH) 
    GTY959321Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *A For TMMK Made Before Sep. 2019 Production *B For TMC Made or TMMK Made From Sep. 2019 Production
    *a Component without harness connected
    (Headlight ECU Sub-assembly LH)    		 - -
    1. Remove the headlight ECU sub-assembly LH.

      Refer to REMOVAL [06/2018 - 09/2022]

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

      Standard Resistance

      FOR TMMK MADE BEFORE SEP. 2019 PRODUCTION

      Tester Connection Condition Specified Condition
      B-20 (TURN+) - B-13 (TURN-)
      or
      A11-11 (TNS) - A11-12 (GND)      		 Always 10 kΩ or higher
      FOR TMC MADE OR TMMK MADE FROM SEP. 2019 PRODUCTION

      Tester Connection Condition Specified Condition
      B-20 (TURN+) - B-13 (TURN-)
      or
      A78-11 (TNS) - A78-12 (GND)      		 Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [06/2018 - 09/2022] 

    Result: 

    OK 

    See step  12

  12. CONFIRM MODEL 
    1. Choose the model to be inspected.

      Result

      Result Proceed to
      For LED Type Turn Signal Light A
      For Bulb Type Turn Signal Light, TMC Made B
      For Bulb Type Turn Signal Light, TMMK Made C

    Result: 

    A 

    REPLACE HEADLIGHT UNIT ASSEMBLY LH. Refer to  DISASSEMBLY [06/2018 - 08/2021] 

    Result: 

    C 

    REPLACE HEADLIGHT ASSEMBLY LH. Refer to  REMOVAL [06/2018 - 08/2021] 

    Result: 

    B 

    See step  13

  13. CHECK LH SIDE LIGHTS (HEADLIGHT CORD LH) 
    1. Interchange the headlight cord LH with RH and connect the connectors.

      Refer to DISASSEMBLY [06/2018 - 08/2021]

    2. Check that the front turn signal light operates normally.

      OK

      Front turn signal light blinks.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT CORD LH. Refer to  DISASSEMBLY [06/2018 - 08/2021] 

    Result: 

    NG 

    REPLACE HEADLIGHT UNIT ASSEMBLY LH. Refer to  DISASSEMBLY [06/2018 - 08/2021] 

  14. CHECK LH SIDE LIGHTS (HAZARD WARNING SIGNAL SWITCH ASSEMBLY) 
    1. Connect the A11 headlight assembly LH connector.*1
    2. Connect the A78 headlight assembly LH connector.*2
    3. Disconnect the G24 hazard warning signal switch assembly connector.
    4. Operate the headlight dimmer switch assembly and check that the LH side turn signal lights other than the headlight turn signal light blink.

      HINT: 

      If the LH side turn signal lights blink, the headlight assembly LH is malfunctioning.

      1. *1: for TMMK Made Before Sep. 2019 Production
      2. *2: for TMC Made or TMMK Made From Sep. 2019 Production

      Result

      Result Proceed to
      LH side turn signal lights blink A
      LH side turn signal lights do not blink B

    Result: 

    A 

    REPLACE HAZARD WARNING SIGNAL SWITCH ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021] 

    Result: 

    B 

    See step  15

  15. CHECK LH SIDE LIGHTS (OUTER MIRROR CONTROL ECU ASSEMBLY LH) 
    GTY809706Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Component without harness connected
    (Outer Mirror Control ECU Assembly LH)    		 - -
    1. Remove the outer mirror control ECU assembly LH.

      Refer to REMOVAL [06/2018 - ]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      z20-16 (T+) - z20-12 (GND)
      or
      J28-11 (TRNI) - J28-7 (GND)      		 Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY LH. Refer to  REMOVAL [06/2018 - ] 

    Result: 

    OK 

    See step  16

  16. CHECK HARNESS AND CONNECTOR (EACH CONNECTED PART - BODY GROUND) 
    1. Disconnect the A11 headlight assembly LH connector.*1
    2. Disconnect the A78 headlight assembly LH connector.*2
    3. Disconnect the G16 combination meter assembly connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      FOR TMMK MADE BEFORE SEP. 2019 PRODUCTION

      Tester Connection Condition Specified Condition
      G24-2 (HFL), A11-11 (TNS), J28-11 (TRNI) or G16-13 (LL) - Body ground Always 10 kΩ or higher
      FOR TMC MADE OR TMMK MADE FROM SEP. 2019 PRODUCTION

      Tester Connection Condition Specified Condition
      G24-2 (HFL), A78-11 (TNS), J28-11 (TRNI) or G16-13 (LL) - Body ground Always 10 kΩ or higher
      1. *1: for TMMK Made Before Sep. 2019 Production
      2. *2: for TMC Made or TMMK Made From Sep. 2019 Production

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  17. CHECK LH SIDE LIGHTS (OUTER REAR VIEW MIRROR ASSEMBLY LH) 
    1. Connect the R9 rear combination light assembly LH connector.
    2. Connect the G16 combination meter assembly connector.
    3. Disconnect the J33 outer rear view mirror assembly LH connector.
    4. Operate the headlight dimmer switch assembly and check that the LH side turn signal lights other than the side turn signal light blink.

      HINT: 

      If the LH side turn signal lights blink, the outer rear view mirror assembly LH is malfunctioning.

      Result

      Result Proceed to
      LH side turn signal lights blink A
      LH side turn signal lights do not blink B

    Result: 

    B 

    See step  19

    Result: 

    A 

    See step  18

  18. INSPECT SIDE TURN SIGNAL LIGHT ASSEMBLY LH 
    1. Remove the side turn signal light assembly LH.

      Refer to REMOVAL [06/2018 - 09/2022]

    2. Inspect the side turn signal light assembly LH.

      Refer to INSPECTION [06/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE OUTER MIRROR RETRACTOR LH. Refer to  DISASSEMBLY [06/2018 - ] 

    Result: 

    NG 

    REPLACE SIDE TURN SIGNAL LIGHT ASSEMBLY LH. Refer to  REMOVAL [06/2018 - 09/2022] 

  19. CHECK LH SIDE LIGHTS (HEADLIGHT ASSEMBLY LH) 
    1. Connect the J33 outer rear view mirror assembly LH connector.
    2. Disconnect the A11 headlight assembly LH connector.*1
    3. Disconnect the A78 headlight assembly LH connector.*2
    4. Operate the headlight dimmer switch assembly and check that the LH side turn signal lights other than the headlight turn signal light blink.

      HINT: 

      If the LH side turn signal lights blink, the headlight assembly LH is malfunctioning.

      1. *1: for TMMK Made Before Sep. 2019 Production
      2. *2: for TMC Made or TMMK Made From Sep. 2019 Production

      Result

      Result Proceed to
      LH side turn signal lights blink A
      LH side turn signal lights do not blink B

    Result: 

    B 

    See step  23

    Result: 

    A 

    See step  20

  20. CHECK LH SIDE LIGHTS (HEADLIGHT ECU SUB-ASSEMBLY LH) 
    GTY959321Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *A For TMMK Made Before Sep. 2019 Production *B For TMC Made or TMMK Made From Sep. 2019 Production
    *a Component without harness connected
    (Headlight ECU Sub-assembly LH)    		 - -
    1. Remove the headlight ECU sub-assembly LH.

      Refer to REMOVAL [06/2018 - 09/2022]

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

      Standard Resistance

      FOR TMMK MADE BEFORE SEP. 2019 PRODUCTION

      Tester Connection Condition Specified Condition
      B-20 (TURN+) - B-13 (TURN-)
      or
      A11-11 (TNS) - A11-12 (GND)      		 Always 10 kΩ or higher
      FOR TMC MADE OR TMMK MADE FROM SEP. 2019 PRODUCTION

      Tester Connection Condition Specified Condition
      B-20 (TURN+) - B-13 (TURN-)
      or
      A78-11 (TNS) - A78-12 (GND)      		 Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [06/2018 - 09/2022] 

    Result: 

    OK 

    See step  21

  21. CONFIRM MODEL 
    1. Choose the model to be inspected.

      Result

      Result Proceed to
      For LED Type Turn Signal Light A
      For Bulb Type Turn Signal Light, TMC Made B
      For Bulb Type Turn Signal Light, TMMK Made C

    Result: 

    A 

    REPLACE HEADLIGHT UNIT ASSEMBLY LH. Refer to  DISASSEMBLY [06/2018 - 08/2021] 

    Result: 

    C 

    REPLACE HEADLIGHT ASSEMBLY LH. Refer to  REMOVAL [06/2018 - 08/2021] 

    Result: 

    B 

    See step  22

  22. CHECK LH SIDE LIGHTS (HEADLIGHT CORD LH) 
    1. Interchange the headlight cord LH with RH and connect the connectors.

      Refer to DISASSEMBLY [06/2018 - 08/2021]

    2. Check that the front turn signal light operates normally.

      OK

      Front turn signal light blinks.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT CORD LH. Refer to  DISASSEMBLY [06/2018 - 08/2021] 

    Result: 

    NG 

    REPLACE HEADLIGHT UNIT ASSEMBLY LH. Refer to  DISASSEMBLY [06/2018 - 08/2021] 

  23. CHECK LH SIDE LIGHTS (HAZARD WARNING SIGNAL SWITCH ASSEMBLY) 
    1. Connect the A11 headlight assembly LH connector.*1
    2. Connect the A78 headlight assembly LH connector.*2
    3. Disconnect the G24 hazard warning signal switch assembly connector.
    4. Operate the headlight dimmer switch assembly and check that the LH side turn signal lights other than the headlight turn signal light blink.

      HINT: 

      If the LH side turn signal lights blink, the headlight assembly LH is malfunctioning.

      1. *1: for TMMK Made Before Sep. 2019 Production
      2. *2: for TMC Made or TMMK Made From Sep. 2019 Production

      Result

      Result Proceed to
      LH side turn signal lights blink A
      LH side turn signal lights do not blink B

    Result: 

    A 

    REPLACE HAZARD WARNING SIGNAL SWITCH ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021] 

    Result: 

    B 

    See step  24

  24. CHECK HARNESS AND CONNECTOR (EACH CONNECTED PART - BODY GROUND) 
    1. Disconnect the A11 headlight assembly LH connector.*1
    2. Disconnect the A78 headlight assembly LH connector.*2
    3. Disconnect the J33 outer rear view mirror assembly LH connector.
    4. Disconnect the G16 combination meter assembly connector.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      FOR TMMK MADE BEFORE SEP. 2019 PRODUCTION

      Tester Connection Condition Specified Condition
      G24-2 (HFL), A11-11 (TNS), J33-16 (B) or G16-13 (LL) - Body ground Always 10 kΩ or higher
      FOR TMC MADE OR TMMK MADE FROM SEP. 2019 PRODUCTION

      Tester Connection Condition Specified Condition
      G24-2 (HFL), A78-11 (TNS), J33-16 (B) or G16-13 (LL) - Body ground Always 10 kΩ or higher
      1. *1: for TMMK Made Before Sep. 2019 Production
      2. *2: for TMC Made or TMMK Made From Sep. 2019 Production

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  25. CONFIRM MODEL 
    1. Choose the model to be inspected.

      Result

      Result Proceed to
      For TMC Made A
      For TMMK Made B

    Result: 

    B 

    See step  28

    Result: 

    A 

    See step  26

  26. CHECK RH SIDE LIGHTS (REAR COMBINATION LIGHT LENS AND BODY RH) 
    1. Disconnect the R8 rear combination light lens and body RH connector.
    2. Operate the headlight dimmer switch assembly and check that the RH side turn signal lights other than the rear turn signal light blink.

      HINT: 

      If the RH side turn signal lights blink, the rear combination light lens and body RH is malfunctioning.

      Result

      Result Proceed to
      RH side turn signal lights blink A
      RH side turn signal lights do not blink B

    Result: 

    A 

    REPLACE REAR COMBINATION LIGHT LENS AND BODY RH. Refer to  REMOVAL [06/2018 - 08/2021] 

    Result: 

    B 

    See step  27

  27. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT LENS AND BODY RH OR COMBINATION METER ASSEMBLY - BODY GROUND) 
    1. Disconnect the G16 combination meter assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R8-3 (TRN) or G16-5 (TRNR) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    See step  30

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  28. CHECK RH SIDE LIGHTS (REAR COMBINATION LIGHT ASSEMBLY RH) 
    1. Disconnect the R8 rear combination light assembly RH connector.
    2. Operate the headlight dimmer switch assembly and check that the RH side turn signal lights other than the rear turn signal light blink.

      HINT: 

      If the RH side turn signal lights blink, the rear combination light assembly RH is malfunctioning.

      Result

      Result Proceed to
      RH side turn signal lights blink A
      RH side turn signal lights do not blink B

    Result: 

    A 

    REPLACE REAR COMBINATION LIGHT ASSEMBLY RH. Refer to  REMOVAL [06/2018 - 08/2021] 

    Result: 

    B 

    See step  29

  29. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY RH OR COMBINATION METER ASSEMBLY - BODY GROUND) 
    1. Disconnect the G16 combination meter assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R8-3 (TRN) or G16-5 (TRNR) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  30

  30. CONFIRM MODEL 
    1. Choose the model to be inspected.

      Result

      Result Proceed to
      w/ Seat Position Memory A
      w/o Seat Position Memory B

    Result: 

    B 

    See step  39

    Result: 

    A 

    See step  31

  31. CHECK RH SIDE LIGHTS (OUTER REAR VIEW MIRROR ASSEMBLY RH) 
    1. Connect the R8 rear combination light assembly RH connector.
    2. Connect the G16 combination meter assembly connector.
    3. Disconnect the z19 outer rear view mirror assembly RH connector.
    4. Operate the headlight dimmer switch assembly and check that the RH side turn signal lights other than the side turn signal light blink.

      HINT: 

      If the RH side turn signal lights blink, the outer rear view mirror assembly RH is malfunctioning.

      Result

      Result Proceed to
      RH side turn signal lights blink A
      RH side turn signal lights do not blink B

    Result: 

    B 

    See step  33

    Result: 

    A 

    See step  32

  32. INSPECT SIDE TURN SIGNAL LIGHT ASSEMBLY RH 
    1. Remove the side turn signal light assembly RH.

      Refer to REMOVAL [06/2018 - 09/2022]

    2. Inspect the side turn signal light assembly RH.

      Refer to INSPECTION [06/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE OUTER MIRROR RETRACTOR RH. Refer to  DISASSEMBLY [06/2018 - ] 

    Result: 

    NG 

    REPLACE SIDE TURN SIGNAL LIGHT ASSEMBLY RH. Refer to  REMOVAL [06/2018 - 09/2022] 

  33. CHECK RH SIDE LIGHTS (HEADLIGHT ASSEMBLY RH) 
    1. Connect the z19 outer rear view mirror assembly RH connector.
    2. Disconnect the A12 headlight assembly RH connector.*1
    3. Disconnect the A79 headlight assembly RH connector.*2
    4. Operate the headlight dimmer switch assembly and check that the RH side turn signal lights other than the headlight turn signal light blink.

      HINT: 

      If the RH side turn signal lights blink, the headlight assembly RH is malfunctioning.

      1. *1: for TMMK Made Before Sep. 2019 Production
      2. *2: for TMC Made or TMMK Made From Sep. 2019 Production

      Result

      Result Proceed to
      RH side turn signal lights blink A
      RH side turn signal lights do not blink B

    Result: 

    B 

    See step  37

    Result: 

    A 

    See step  34

  34. CHECK RH SIDE LIGHTS (HEADLIGHT ECU SUB-ASSEMBLY RH) 
    GTY959344Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *A For TMMK Made Before Sep. 2019 Production *B For TMC Made or TMMK Made From Sep. 2019 Production
    *a Component without harness connected
    (Headlight ECU Sub-assembly RH)    		 - -
    1. Remove the headlight ECU sub-assembly RH.

      Refer to REMOVAL [06/2018 - 09/2022]

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

      Standard Resistance

      FOR TMMK MADE BEFORE SEP. 2019 PRODUCTION

      Tester Connection Condition Specified Condition
      C-20 (TURN+) - C-13 (TURN-)
      or
      A12-11 (TNS) - A12-12 (GND)      		 Always 10 kΩ or higher
      FOR TMC MADE OR TMMK MADE FROM SEP. 2019 PRODUCTION

      Tester Connection Condition Specified Condition
      C-20 (TURN+) - C-13 (TURN-)
      or
      A79-11 (TNS) - A79-12 (GND)      		 Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH. Refer to  REMOVAL [06/2018 - 09/2022] 

    Result: 

    OK 

    See step  35

  35. CONFIRM MODEL 
    1. Choose the model to be inspected.

      Result

      Result Proceed to
      For LED Type Turn Signal Light A
      For Bulb Type Turn Signal Light, TMC Made B
      For Bulb Type Turn Signal Light, TMMK Made C

    Result: 

    A 

    REPLACE HEADLIGHT UNIT ASSEMBLY RH. Refer to  DISASSEMBLY [06/2018 - 08/2021] 

    Result: 

    C 

    REPLACE HEADLIGHT ASSEMBLY RH. Refer to  REMOVAL [06/2018 - 08/2021] 

    Result: 

    B 

    See step  36

  36. CHECK RH SIDE LIGHTS (HEADLIGHT CORD RH) 
    1. Interchange the headlight cord RH with LH and connect the connectors.

      Refer to DISASSEMBLY [06/2018 - 08/2021]

    2. Check that the front turn signal light operates normally.

      OK

      Front turn signal light blinks.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT CORD RH. Refer to  DISASSEMBLY [06/2018 - 08/2021] 

    Result: 

    NG 

    REPLACE HEADLIGHT UNIT ASSEMBLY RH. Refer to  DISASSEMBLY [06/2018 - 08/2021] 

  37. CHECK RH SIDE LIGHTS (OUTER MIRROR CONTROL ECU ASSEMBLY RH) 
    GTY809704Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Component without harness connected
    (Outer Mirror Control ECU Assembly RH)    		 - -
    1. Remove the outer mirror control ECU assembly RH.

      Refer to REMOVAL [06/2018 - ]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      z19-16 (T+) - z19-12 (GND)
      or
      J6-11 (TRNI) - J6-7 (GND)      		 Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY RH. Refer to  REMOVAL [06/2018 - ] 

    Result: 

    OK 

    See step  38

  38. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH, OUTER MIRROR CONTROL ECU ASSEMBLY RH OR COMBINATION METER ASSEMBLY - BODY GROUND) 
    1. Disconnect the G16 combination meter assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      FOR TMMK MADE BEFORE SEP. 2019 PRODUCTION

      Tester Connection Condition Specified Condition
      A12-11 (TNS), J6-11 (TRNI) or G16-7 (LR) - Body ground Always 10 kΩ or higher
      FOR TMC MADE OR TMMK MADE FROM SEP. 2019 PRODUCTION

      Tester Connection Condition Specified Condition
      A79-11 (TNS), J6-11 (TRNI) or G16-7 (LR) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  39. CHECK RH SIDE LIGHTS (OUTER REAR VIEW MIRROR ASSEMBLY RH) 
    1. Connect the R8 rear combination light assembly RH connector.
    2. Connect the G16 combination meter assembly connector.
    3. Disconnect the J11 outer rear view mirror assembly RH connector.
    4. Operate the headlight dimmer switch assembly and check that the RH side turn signal lights other than the side turn signal light blink.

      HINT: 

      If the RH side turn signal lights blink, the outer rear view mirror assembly RH is malfunctioning.

      Result

      Result Proceed to
      RH side turn signal lights blink A
      RH side turn signal lights do not blink B

    Result: 

    B 

    See step  41

    Result: 

    A 

    See step  40

  40. INSPECT SIDE TURN SIGNAL LIGHT ASSEMBLY RH 
    1. Remove the side turn signal light assembly RH.

      Refer to REMOVAL [06/2018 - 09/2022]

    2. Inspect the side turn signal light assembly RH.

      Refer to INSPECTION [06/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE OUTER MIRROR RETRACTOR RH. Refer to  DISASSEMBLY [06/2018 - ] 

    Result: 

    NG 

    REPLACE SIDE TURN SIGNAL LIGHT ASSEMBLY RH. Refer to  REMOVAL [06/2018 - 09/2022] 

  41. CHECK RH SIDE LIGHTS (HEADLIGHT ASSEMBLY RH) 
    1. Connect the J11 outer rear view mirror assembly RH connector.
    2. Disconnect the A12 headlight assembly RH connector.*1
    3. Disconnect the A79 headlight assembly RH connector.*2
    4. Operate the headlight dimmer switch assembly and check that the RH side turn signal lights other than the headlight turn signal light blink.

      HINT: 

      If the RH side turn signal lights blink, the headlight assembly RH is malfunctioning.

      1. *1: for TMMK Made Before Sep. 2019 Production
      2. *2: for TMC Made or TMMK Made From Sep. 2019 Production

      Result

      Result Proceed to
      RH side turn signal lights blink A
      RH side turn signal lights do not blink B

    Result: 

    B 

    See step  45

    Result: 

    A 

    See step  42

  42. CHECK RH SIDE LIGHTS (HEADLIGHT ECU SUB-ASSEMBLY RH) 
    GTY959344Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *A For TMMK Made Before Sep. 2019 Production *B For TMC Made or TMMK Made From Sep. 2019 Production
    *a Component without harness connected
    (Headlight ECU Sub-assembly RH)    		 - -
    1. Remove the headlight ECU sub-assembly RH.

      Refer to REMOVAL [06/2018 - 09/2022]

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

      Standard Resistance

      FOR TMMK MADE BEFORE SEP. 2019 PRODUCTION

      Tester Connection Condition Specified Condition
      C-20 (TURN+) - C-13 (TURN-)
      or
      A12-11 (TNS) - A12-12 (GND)      		 Always 10 kΩ or higher
      FOR TMC MADE OR TMMK MADE FROM SEP. 2019 PRODUCTION

      Tester Connection Condition Specified Condition
      C-20 (TURN+) - C-13 (TURN-)
      or
      A79-11 (TNS) - A79-12 (GND)      		 Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH. Refer to  REMOVAL [06/2018 - 09/2022] 

    Result: 

    OK 

    See step  43

  43. CONFIRM MODEL 
    1. Choose the model to be inspected.

      Result

      Result Proceed to
      For LED Type Turn Signal Light A
      For Bulb Type Turn Signal Light, TMC Made B
      For Bulb Type Turn Signal Light, TMMK Made C

    Result: 

    A 

    REPLACE HEADLIGHT UNIT ASSEMBLY RH. Refer to  DISASSEMBLY [06/2018 - 08/2021] 

    Result: 

    C 

    REPLACE HEADLIGHT ASSEMBLY RH. Refer to  REMOVAL [06/2018 - 08/2021] 

    Result: 

    B 

    See step  44

  44. CHECK RH SIDE LIGHTS (HEADLIGHT CORD RH) 
    1. Interchange the headlight cord RH with LH and connect the connectors.

      Refer to DISASSEMBLY [06/2018 - 08/2021]

    2. Check that the front turn signal light operates normally.

      OK

      Front turn signal light blinks.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT CORD RH. Refer to  DISASSEMBLY [06/2018 - 08/2021] 

    Result: 

    NG 

    REPLACE HEADLIGHT UNIT ASSEMBLY RH. Refer to  DISASSEMBLY [06/2018 - 08/2021] 

  45. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH, OUTER REAR VIEW MIRROR ASSEMBLY RH OR COMBINATION METER ASSEMBLY - BODY GROUND) 
    1. Disconnect the J11 outer rear view mirror assembly RH connector.
    2. Disconnect the G16 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      FOR TMMK MADE BEFORE SEP. 2019 PRODUCTION

      Tester Connection Condition Specified Condition
      A12-11 (TNS), J11-16 (B) or G16-7 (LR) - Body ground Always 10 kΩ or higher
      FOR TMC MADE OR TMMK MADE FROM SEP. 2019 PRODUCTION

      Tester Connection Condition Specified Condition
      A79-11 (TNS), J11-16 (B) or G16-7 (LR) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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