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Home >> Toyota >> 2022 >> Avalon XLE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 47 (Meter / Gauge / Display - Diagnostic Codes & Symptom Tests (Hybrid)) >> METER / GAUGE SYSTEM (for HV Model) >> DTC B1507-18: Turn Signal Light Circuit Current Below Threshold [04/2018 - 08/2019] >> Procedure

DTC B1507-18: Turn Signal Light Circuit Current Below Threshold [04/2018 - 08/2019]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. INSPECT LIGHTS 
    1. Inspect the illumination of each turn signal light.

      Result

      Result Proceed to
      Front turn signal light LH does not blink A
      Rear turn signal light LH does not blink B
      Front turn signal light RH does not blink C
      Rear turn signal light RH does not blink D

    Result: 

    B 

    See step  8

    Result: 

    C 

    See step  18

    Result: 

    D 

    See step  24

    Result: 

    A 

    See step  2

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

      Result

      Result Proceed to
      w/ Cornering Light A
      w/o Cornering Light B

    Result: 

    B 

    See step  6

    Result: 

    A 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) 
    1. Disconnect the A8 headlight assembly LH connector.
    2. Disconnect the G15 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A8-11 (TNS) - G15-11 (LL) Always Below 1 Ω
      A8-12 (GND) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. INSPECT HEADLIGHT ECU SUB-ASSEMBLY LH 
    GTY870805Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Component without harness connected
    (Headlight ECU Sub-assembly LH)    		 - -
    1. Remove the headlight ECU sub-assembly LH.

      Refer to REMOVAL [04/2018 - ]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      B-20 (TURN+) - A8-11 (TNS) Always Below 1 Ω
      B-13 (TURN-) - A8-12 (GND) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [04/2018 - ] 

    Result: 

    OK 

    See step  5

  5. CHECK HEADLIGHT ASSEMBLY LH 
    1. Connect the G15 combination meter assembly connector.
    2. Remove each headlight ECU sub-assembly, interchange the headlight assembly LH with RH and connect the connectors.

      Refer to DISASSEMBLY [04/2018 - ]

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

      OK

      Front turn signal light blinks.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT ASSEMBLY LH. Refer to  REMOVAL [04/2018 - ] 

    Result: 

    NG 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2020] 

  6. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) 
    1. Disconnect the A45 headlight assembly LH connector.
    2. Disconnect the G15 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A45-2 (B) - G15-11 (LL) Always Below 1 Ω
      A45-7 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

  7. CHECK HEADLIGHT ASSEMBLY LH 
    1. Connect the G15 combination meter assembly connector.
    2. Interchange the headlight assembly LH with RH and connect the connectors.

      Refer to REMOVAL [04/2018 - ]

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

      OK

      Front turn signal light blinks.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT ASSEMBLY LH. Refer to  REMOVAL [04/2018 - ] 

    Result: 

    NG 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2020] 

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

      Result

      Result Proceed to
      w/ Cornering Light A
      w/o Cornering Light B

    Result: 

    B 

    See step  15

    Result: 

    A 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) 
    1. Disconnect the P10 rear combination light assembly LH connector.
    2. Disconnect the G15 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      P10-3 (TRN) - G15-10 (TRNL) Always Below 1 Ω
      P10-4 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  10

  10. CHECK REAR COMBINATION LIGHT SOCKET AND WIRE LH 
    1. Connect the G15 combination meter assembly connector.
    2. Interchange the rear combination light socket and wire LH with RH and connect the connectors.

      Refer to DISASSEMBLY [04/2018 - ]

    3. Check that the rear turn signal light operates normally.

      OK

      Rear turn signal light blinks.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE REAR COMBINATION LIGHT SOCKET AND WIRE LH. Refer to  DISASSEMBLY [04/2018 - ] 

    Result: 

    NG 

    See step  11

  11. INSPECT REAR COMBINATION LIGHT ASSEMBLY LH 
    1. Remove the rear combination light assembly LH.

      Refer to REMOVAL [04/2018 - ]

    2. Inspect the rear combination light assembly LH.

      Refer to INSPECTION [04/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR COMBINATION LIGHT ASSEMBLY LH. Refer to  REMOVAL [04/2018 - ] 

    Result: 

    OK 

    See step  12

  12. CHECK HARNESS AND CONNECTOR (REAR LIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) 
    1. Disconnect the P12 rear light assembly LH connector.
    2. Disconnect the G15 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      P12-3 (B) - G15-10 (TRNL) Always Below 1 Ω
      P12-4 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  13

  13. CHECK REAR LIGHT CORD LH 
    1. Connect the G15 combination meter assembly connector.
    2. Interchange the rear light cord LH with RH and connect the connectors.

      Refer to DISASSEMBLY [04/2018 - ]

    3. Check that the rear turn signal light operates normally.

      OK

      Rear turn signal light blinks.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE REAR LIGHT CORD LH. Refer to  DISASSEMBLY [04/2018 - ] 

    Result: 

    NG 

    See step  14

  14. INSPECT REAR LIGHT ASSEMBLY LH 
    1. Remove the rear light assembly LH.

      Refer to REMOVAL [04/2018 - ]

    2. Inspect the rear light assembly LH.

      Refer to INSPECTION [04/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2020] 

    Result: 

    NG 

    REPLACE REAR LIGHT ASSEMBLY LH. Refer to  REMOVAL [04/2018 - ] 

  15. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) 
    1. Disconnect the P10 rear combination light assembly LH connector.
    2. Disconnect the G15 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      P10-3 (TRN) - G15-10 (TRNL) Always Below 1 Ω
      P10-4 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  16

  16. CHECK REAR COMBINATION LIGHT SOCKET AND WIRE LH 
    1. Connect the G15 combination meter assembly connector.
    2. Interchange the rear combination light socket and wire LH with RH and connect the connectors.

      Refer to DISASSEMBLY [04/2018 - ]

    3. Check that the rear turn signal light operates normally.

      OK

      Rear turn signal light blinks.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE REAR COMBINATION LIGHT SOCKET AND WIRE LH. Refer to  DISASSEMBLY [04/2018 - ] 

    Result: 

    NG 

    See step  17

  17. INSPECT REAR COMBINATION LIGHT ASSEMBLY LH 
    1. Remove the rear combination light assembly LH.

      Refer to REMOVAL [04/2018 - ]

    2. Inspect the rear combination light assembly LH.

      Refer to INSPECTION [04/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2020] 

    Result: 

    NG 

    REPLACE REAR COMBINATION LIGHT ASSEMBLY LH. Refer to  REMOVAL [04/2018 - ] 

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

      Result

      Result Proceed to
      w/ Cornering Light A
      w/o Cornering Light B

    Result: 

    B 

    See step  22

    Result: 

    A 

    See step  19

  19. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) 
    1. Disconnect the A9 headlight assembly RH connector.
    2. Disconnect the G15 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A9-11 (TNS) - G15-7 (LR) Always Below 1 Ω
      A9-12 (GND) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  20

  20. INSPECT HEADLIGHT ECU SUB-ASSEMBLY RH 
    GTY870804Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Component without harness connected
    (Headlight ECU Sub-assembly RH)    		 - -
    1. Remove the headlight ECU sub-assembly RH.

      Refer to REMOVAL [04/2018 - ]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      C-20 (TURN+) - A9-11 (TNS) Always Below 1 Ω
      C-13 (TURN-) - A9-12 (GND) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH. Refer to  REMOVAL [04/2018 - ] 

    Result: 

    OK 

    See step  21

  21. CHECK HEADLIGHT ASSEMBLY RH 
    1. Connect the G15 combination meter assembly connector.
    2. Remove each headlight ECU sub-assembly, interchange the headlight assembly RH with LH and connect the connectors.

      Refer to DISASSEMBLY [04/2018 - ]

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

      OK

      Front turn signal light blinks.

      Result

      Proceed to
      OK
      NG
    4. Connect the G15 combination meter assembly connector.

    Result: 

    OK 

    REPLACE HEADLIGHT ASSEMBLY RH. Refer to  REMOVAL [04/2018 - ] 

    Result: 

    NG 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2020] 

  22. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) 
    1. Disconnect the A44 headlight assembly RH connector.
    2. Disconnect the G15 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A44-2 (B) - G15-7 (LR) Always Below 1 Ω
      A44-7 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  23

  23. CHECK HEADLIGHT ASSEMBLY RH 
    1. Connect the G15 combination meter assembly connector.
    2. Interchange the headlight assembly RH with LH and connect the connectors.

      Refer to REMOVAL [04/2018 - ]

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

      OK

      Front turn signal light blinks.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT ASSEMBLY RH. Refer to  REMOVAL [04/2018 - ] 

    Result: 

    NG 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2020] 

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

      Result

      Result Proceed to
      w/ Cornering Light A
      w/o Cornering Light B

    Result: 

    B 

    See step  31

    Result: 

    A 

    See step  25

  25. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) 
    1. Disconnect the P9 rear combination light assembly RH connector.
    2. Disconnect the G15 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      P9-3 (TRN) - G15-13 (TRNR) Always Below 1 Ω
      P9-4 (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 REAR COMBINATION LIGHT SOCKET AND WIRE RH 
    1. Connect the G15 combination meter assembly connector.
    2. Interchange the rear combination light socket and wire RH with LH and connect the connectors.

      Refer to DISASSEMBLY [04/2018 - ]

    3. Check that the rear turn signal light operates normally.

      OK

      Rear turn signal light blinks.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE REAR COMBINATION LIGHT SOCKET AND WIRE RH. Refer to  DISASSEMBLY [04/2018 - ] 

    Result: 

    NG 

    See step  27

  27. INSPECT REAR COMBINATION LIGHT ASSEMBLY RH 
    1. Remove the rear combination light assembly RH.

      Refer to REMOVAL [04/2018 - ]

    2. Inspect the rear combination light assembly RH.

      Refer to INSPECTION [04/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR COMBINATION LIGHT ASSEMBLY RH. Refer to  REMOVAL [04/2018 - ] 

    Result: 

    OK 

    See step  28

  28. CHECK HARNESS AND CONNECTOR (REAR LIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) 
    1. Disconnect the P11 rear light assembly RH connector.
    2. Disconnect the G15 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      P11-3 (B) - G15-13 (TRNR) Always Below 1 Ω
      P11-4 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  29

  29. CHECK REAR LIGHT CORD RH 
    1. Connect the G15 combination meter assembly connector.
    2. Interchange the rear light cord RH with LH and connect the connectors.

      Refer to DISASSEMBLY [04/2018 - ]

    3. Check that the rear turn signal light operates normally.

      OK

      Rear turn signal light blinks.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE REAR LIGHT CORD RH. Refer to  DISASSEMBLY [04/2018 - ] 

    Result: 

    NG 

    See step  30

  30. INSPECT REAR LIGHT ASSEMBLY RH 
    1. Remove the rear light assembly RH.

      Refer to REMOVAL [04/2018 - ]

    2. Inspect the rear light assembly RH.

      Refer to INSPECTION [04/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2020] 

    Result: 

    NG 

    REPLACE REAR LIGHT ASSEMBLY RH. Refer to  REMOVAL [04/2018 - ] 

  31. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) 
    1. Disconnect the P9 rear combination light assembly RH connector.
    2. Disconnect the G15 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      P9-3 (TRN) - G15-13 (TRNR) Always Below 1 Ω
      P9-4 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  32

  32. CHECK REAR COMBINATION LIGHT SOCKET AND WIRE RH 
    1. Connect the G15 combination meter assembly connector.
    2. Interchange the rear combination light socket and wire RH with LH and connect the connectors.

      Refer to DISASSEMBLY [04/2018 - ]

    3. Check that the rear turn signal light operates normally.

      OK

      Rear turn signal light blinks.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE REAR COMBINATION LIGHT SOCKET AND WIRE RH. Refer to  DISASSEMBLY [04/2018 - ] 

    Result: 

    NG 

    See step  33

  33. INSPECT REAR COMBINATION LIGHT ASSEMBLY RH 
    1. Remove the rear combination light assembly RH.

      Refer to REMOVAL [04/2018 - ]

    2. Inspect the rear combination light assembly RH.

      Refer to INSPECTION [04/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2020] 

    Result: 

    NG 

    REPLACE REAR COMBINATION LIGHT ASSEMBLY RH. Refer to  REMOVAL [04/2018 - ] 

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