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Home >> Toyota >> 2024 >> Corolla LE >> Repair and Diagnosis >> External Pages >> Different car >> Section 86 (Meter / Gauge System (HEV) - Diagnostic Codes, Symptom Tests & Circuit Tests) >> METER / GAUGE SYSTEM (for HV Model) >> DTC B1507-18: Turn Signal Light Circuit Current Below Threshold [01/2019 - 09/2022] >> Procedure

DTC B1507-18: Turn Signal Light Circuit Current Below Threshold [01/2019 - 09/2022]: Procedure

WARNING: This page is about a different car, the 2022 Toyota Corolla, 2021 Toyota Corolla, and 2020 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK SYMPTOMS 
    1. Check the problem symptoms.

      Result

      Result Proceed to
      LH side front turn signal light does not blink A
      LH side rear turn signal light does not blink B
      RH side front turn signal light does not blink C
      RH side rear turn signal light does not blink D

    Result: 

    B 

    See step  4

    Result: 

    C 

    See step  6

    Result: 

    D 

    See step  8

    Result: 

    A 

    See step  2

  2. CHECK LH SIDE FRONT TURN SIGNAL LIGHT (HEADLIGHT UNIT ASSEMBLY LH) 
    1. Interchange the headlight unit assembly LH with RH and connect the connectors.

      Refer to DISASSEMBLY [01/2019 - 03/2019] , or refer to DISASSEMBLY [03/2019 - 09/2022]

    2. 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 unit 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

    Result: 

    A 

    REPLACE HEADLIGHT UNIT ASSEMBLY LH. Refer to  DISASSEMBLY [01/2019 - 03/2019]  , or refer to  DISASSEMBLY [03/2019 - 09/2022] 

    Result: 

    B 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) 
    1. Disconnect the A83 headlight assembly LH connector.
    2. Disconnect the I5 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A83-2 (B) - I5-1 (LL) Always Below 1 Ω
      A83-3 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [01/2019 - 03/2019]  , or refer to  REMOVAL [03/2019 - 09/2022] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  4. CHECK LH SIDE REAR TURN SIGNAL LIGHT (REAR COMBINATION LIGHT CORD LH) 
    1. Interchange the rear combination light cord LH with RH and connect the connectors.

      Refer to REMOVAL [01/2019 - 03/2019] , or refer to REMOVAL [03/2019 - ]

    2. 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 lights operates normally, the rear combination light cord LH is malfunctioning.

      Result

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

    Result: 

    A 

    REPLACE REAR COMBINATION LIGHT CORD LH. Refer to  REMOVAL [01/2019 - 03/2019]  , or refer to  REMOVAL [03/2019 - ] 

    Result: 

    B 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) 
    1. Disconnect the O104 rear combination light assembly LH connector.
    2. Disconnect the I5 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O104-3 (B) - I5-5 (TRNL) Always Below 1 Ω
      O104-4 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [01/2019 - 03/2019]  , or refer to  REMOVAL [03/2019 - 09/2022] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  6. CHECK RH SIDE FRONT TURN SIGNAL LIGHT (HEADLIGHT UNIT ASSEMBLY RH) 
    1. Interchange the headlight unit assembly RH with LH and connect the connectors.

      Refer to DISASSEMBLY [01/2019 - 03/2019] , or refer to DISASSEMBLY [03/2019 - 09/2022]

    2. 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 unit 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

    Result: 

    A 

    REPLACE HEADLIGHT UNIT ASSEMBLY RH. Refer to  DISASSEMBLY [01/2019 - 03/2019]  , or refer to  DISASSEMBLY [03/2019 - 09/2022] 

    Result: 

    B 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) 
    1. Disconnect the A82 headlight assembly RH connector.
    2. Disconnect the I5 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A82-2 (B) - I5-2 (LR) Always Below 1 Ω
      A82-3 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [01/2019 - 03/2019]  , or refer to  REMOVAL [03/2019 - 09/2022] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  8. CHECK RH SIDE REAR TURN SIGNAL LIGHT (REAR COMBINATION LIGHT CORD RH) 
    1. Interchange the rear combination light cord RH with LH and connect the connectors.

      Refer to REMOVAL [01/2019 - 03/2019] , or refer to REMOVAL [03/2019 - ]

    2. 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 lights operates normally, the rear combination light cord RH is malfunctioning.

      Result

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

    Result: 

    A 

    REPLACE REAR COMBINATION LIGHT CORD RH. Refer to  REMOVAL [01/2019 - 03/2019]  , or refer to  REMOVAL [03/2019 - ] 

    Result: 

    B 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) 
    1. Disconnect the O103 rear combination light assembly RH connector.
    2. Disconnect the I5 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O103-3 (B) - I5-6 (TRNR) Always Below 1 Ω
      O103-4 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [01/2019 - 03/2019]  , or refer to  REMOVAL [03/2019 - 09/2022] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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