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DTC B1507-18: Turn Signal Light Circuit Current Below Threshold [12/2022 - ]: Procedure

  1. CHECK SYMPTOMS 
    1. Operate the turn signal switch and check the problem symptoms.

      Result

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

    Result: 

    B 

    See step  7

    Result: 

    C 

    See step  9

    Result: 

    D 

    See step  14

    Result: 

    A 

    See step  2

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

      Result

      Result Proceed to
      w/o Front Turn Signal LED Socket A
      w/ Front Turn Signal LED Socket B

    Result: 

    B 

    See step  5

    Result: 

    A 

    See step  3

  3. CHECK LH SIDE FRONT TURN SIGNAL LIGHT 

    Pre-procedure1

    • Interchange the headlight housing sub-assembly LH with RH and connect the connectors.
    • Operate the turn signal switch and check that the LH side front turn signal light operates normally.

      HINT: 

      If the LH side front turn signal light operates normally, the headlight housing sub-assembly LH is malfunctioning.

      Result

      Result Proceed to
      LH side front turn signal light operates normally A
      Problem symptoms do not change
      (LH side front turn signal light does not blink)      		 B

    Post-procedure1

    • None

    Result: 

    A 

    REPLACE HEADLIGHT HOUSING SUB-ASSEMBLY LH. Refer to  DISASSEMBLY [12/2022 - ] 

    Result: 

    B 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) 

    Pre-procedure1

    • Disconnect the A38 headlight assembly LH connector.
    • Disconnect the K19 combination meter assembly connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      A38-2 (B) - K19-5 (LL) Always Below 1 Ω Ω
      A38-1 (E) - Body ground Always Below 1 Ω Ω

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  5. CHECK LH SIDE FRONT TURN SIGNAL LIGHT 

    Pre-procedure1

    • Interchange the headlight front turn signal LED LH with RH and connect the connectors.
    • Operate the turn signal switch and check that the LH side front turn signal light operates normally.

      HINT: 

      If the LH side front turn signal light operates normally, the headlight front turn signal LED LH is malfunctioning.

      Result

      Result Proceed to
      LH side front turn signal light operates normally A
      Problem symptoms do not change
      (LH side front turn signal light does not blink)      		 B

    Post-procedure1

    • None

    Result: 

    A 

    REPLACE HEADLIGHT FRONT TURN SIGNAL LED LH. Refer to  DISASSEMBLY [12/2022 - ] 

    Result: 

    B 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) 

    Pre-procedure1

    • Disconnect the A40 headlight assembly LH connector.
    • Disconnect the K19 combination meter assembly connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      A40-2 (B) - K19-5 (LL) Always Below 1 Ω Ω
      A40-1 (E) - Body ground Always Below 1 Ω Ω

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  7. CHECK LH SIDE REAR TURN SIGNAL LIGHT 

    Pre-procedure1

    • Interchange the rear combination light assembly LH with RH and connect the connectors.
    • Operate the turn signal switch and check that the LH side rear turn signal light operates normally.

      HINT: 

      If the LH side rear turn signal light operates normally, the rear combination light assembly LH is malfunctioning.

      Result

      Result Proceed to
      LH side rear turn signal light operates normally A
      Problem symptoms do not change
      (LH side rear turn signal light does not blink)      		 B

    Post-procedure1

    • None

    Result: 

    A 

    REPLACE REAR COMBINATION LIGHT ASSEMBLY LH. Refer to  REMOVAL [12/2022 - ] 

    Result: 

    B 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) 

    Pre-procedure1

    • Disconnect the K19 combination meter assembly connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      S5-2 (B) - K19-22 (TRNL) Always Below 1 Ω Ω
      S5-1 (E) - Body ground Always Below 1 Ω Ω

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

      Result

      Result Proceed to
      w/o Front Turn Signal LED Socket A
      w/ Front Turn Signal LED Socket B

    Result: 

    B 

    See step  12

    Result: 

    A 

    See step  10

  10. CHECK RH SIDE FRONT TURN SIGNAL LIGHT 

    Pre-procedure1

    • Interchange the headlight housing sub-assembly RH with LH and connect the connectors.
    • Operate the turn signal switch and check that the RH side front turn signal light operates normally.

      HINT: 

      If the RH side front turn signal light operates normally, the headlight housing sub-assembly RH is malfunctioning.

      Result

      Result Proceed to
      RH side front turn signal light operates normally A
      Problem symptoms do not change
      (RH side front turn signal light does not blink)      		 B

    Post-procedure1

    • None

    Result: 

    A 

    REPLACE HEADLAMP HOUSING SUB-ASSEMBLY RH. Refer to  DISASSEMBLY [12/2022 - ] 

    Result: 

    B 

    See step  11

  11. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) 

    Pre-procedure1

    • Disconnect the A36 headlight assembly RH connector.
    • Disconnect the K19 combination meter assembly connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      A36-2 (B) - K19-6 (LR) Always Below 1 Ω Ω
      A36-1 (E) - Body ground Always Below 1 Ω Ω

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  12. CHECK RH SIDE FRONT TURN SIGNAL LIGHT 

    Pre-procedure1

    • Interchange the headlight front turn signal LED RH with LH and connect the connectors.
    • Operate the turn signal switch and check that the RH side front turn signal light operates normally.

      HINT: 

      If the RH side front turn signal light operates normally, the headlight front turn signal LED RH is malfunctioning.

      Result

      Result Proceed to
      RH side front turn signal light operates normally A
      Problem symptoms do not change
      (RH side front turn signal light does not blink)      		 B

    Post-procedure1

    • None

    Result: 

    A 

    REPLACE HEADLIGHT FRONT TURN SIGNAL LED RH. Refer to  DISASSEMBLY [12/2022 - ] 

    Result: 

    B 

    See step  13

  13. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) 

    Pre-procedure1

    • Disconnect the A39 headlight assembly RH connector.
    • Disconnect the K19 combination meter assembly connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      A39-2 (B) - K19-6 (LR) Always Below 1 Ω Ω
      A39-1 (E) - Body ground Always Below 1 Ω Ω

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  14. CHECK RH SIDE REAR TURN SIGNAL LIGHT 

    Pre-procedure1

    • Interchange the rear combination light assembly RH with LH and connect the connectors.
    • Operate the turn signal switch and check that the RH side rear turn signal light operates normally.

      HINT: 

      If the RH side rear turn signal light operates normally, the rear combination light assembly RH is malfunctioning.

      Result

      Result Proceed to
      RH side rear turn signal light operates normally A
      Problem symptoms do not change
      (RH side rear turn signal light does not blink)      		 B

    Post-procedure1

    • None

    Result: 

    A 

    REPLACE REAR COMBINATION LIGHT ASSEMBLY RH. Refer to  REMOVAL [12/2022 - ] 

    Result: 

    B 

    See step  15

  15. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) 

    Pre-procedure1

    • Disconnect the K19 combination meter assembly connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      S4-2 (B) - K19-21 (TRNR) Always Below 1 Ω Ω
      S4-1 (E) - Body ground Always Below 1 Ω Ω

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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