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Home >> Toyota >> 2021 >> C-HR LE >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge / Display - Diagnostic Codes & Symptom Tests >> Meter / Gauge System >> DTC B1507: Open in Turn Signal Circuit; DTC B1508: Short in Turn Signal / Hazard Flasher Circuit [10/2017 - 09/2019] >> Procedure

DTC B1507: Open in Turn Signal Circuit; DTC B1508: Short in Turn Signal / Hazard Flasher Circuit [10/2017 - 09/2019]: Procedure

  1. INSPECT LIGHTS 
    1. Inspect the illumination of each turn signal light.

      Result

      Result Proceed to
      RH side turn signal light does not illuminate. A
      LH side turn signal light does not illuminate. B

    Result: 

    B 

    See step  8

    Result: 

    A 

    See step  2

  2. CHECK TURN SIGNAL LIGHTS (RH SIDE) 
    1. Turn the ignition switch ON.
    2. Set the headlight dimmer switch assembly to the right turn switch position.
    3. Check the operation of the turn signal lights (RH side).

      Result

      Result Proceed to
      Front turn signal light assembly (RH side) does not blink. (for LED Headlight Type) A
      Front turn signal light assembly (RH side) does not blink. (for Halogen Headlight Type) B
      Side turn signal light assembly (RH side) does not blink. C
      Rear turn signal light assembly (RH side) does not blink. D

    Result: 

    B 

    See step  5

    Result: 

    C 

    See step  6

    Result: 

    D 

    See step  7

    Result: 

    A 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (HEADLIGHT ECU SUB-ASSEMBLY RH - COMBINATION METER ASSEMBLY OR BODY GROUND) 
    1. Disconnect the A17 headlight ECU sub-assembly RH connector.
    2. Disconnect the F5 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the chart below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A17-11 (TNS) - F5-7 (LR) Always Below 1 Ω
      A17-12 (GND) - Body ground Always Below 1 Ω
      A17-11 (TNS) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. INSPECT HEADLIGHT ECU SUB-ASSEMBLY RH 
    1. Remove the Headlight ECU sub-assembly RH.

      Refer to REMOVAL [10/2017 - 09/2019]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      A17-11 (TNS) - B-9 (TURN+) Always Below 1 Ω
      A17-12 (GND) - B-13 (TURN-) Always Below 1 Ω
      A17-11 (TNS) - A17-12 (GND) Always 10 kΩ or higher
      GTY758399Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Headlight ECU sub-assembly RH)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [02/2017 - 08/2020] 

    Result: 

    NG 

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH. Refer to  REMOVAL [10/2017 - 09/2019] 

  5. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY OR BODY GROUND) 
    1. Disconnect the A29 headlight assembly RH connector.
    2. Disconnect the F5 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the chart below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A29-4 (B) - F5-7 (LR) Always Below 1 Ω
      A29-6 (E) - Body ground Always Below 1 Ω
      A29-4 (B) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [02/2017 - 08/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  6. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - OUTER REAR VIEW MIRROR ASSEMBLY RH) 
    1. Disconnect the F5 combination meter assembly connector.
    2. Disconnect the I8 outer rear view mirror assembly RH connector.
    3. Measure the resistance according to the value(s) in the chart below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F5-7 (LR) - I8-1 (B) Always Below 1 Ω
      I8-2 (E) - Body ground Always Below 1 Ω
      I8-1 (B) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [02/2017 - 08/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  7. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY OR BODY GROUND) 
    1. Disconnect the M47 rear combination light assembly RH connector.
    2. Disconnect the F5 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the chart below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      M47-4 (TRN) - F5-5 (TRNR) Always Below 1 Ω
      M47-3 (E) - Body ground Always Below 1 Ω
      M47-4 (TRN) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [02/2017 - 08/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  8. CHECK TURN SIGNAL LIGHTS (LH SIDE) 
    1. Turn the ignition switch ON.
    2. Set the headlight dimmer switch assembly to the left turn switch position.
    3. Check the operation of the turn signal lights (LH side).

      Result

      Result Proceed to
      Front turn signal light assembly (LH side) does not blink. (for LED Headlight Type) A
      Front turn signal light assembly (RH side) does not blink. (for Halogen Headlight Type) B
      Side turn signal light assembly (LH side) does not blink. C
      Rear turn signal light assembly (LH side) does not blink. D

    Result: 

    B 

    See step  11

    Result: 

    C 

    See step  12

    Result: 

    D 

    See step  13

    Result: 

    A 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - HEADLIGHT ECU SUB-ASSEMBLY LH OR BODY GROUND) 
    1. Disconnect the A16 headlight ECU sub-assembly LH connector.
    2. Disconnect the F5 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the chart below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A16-11 (TNS) - F5-13 (LL) Always Below 1 Ω
      A16-12 (GND) - Body ground Always Below 1 Ω
      A16-11 (TNS) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  10

  10. INSPECT HEADLIGHT ECU SUB-ASSEMBLY LH 
    1. Remove the Headlight ECU sub-assembly LH.

      Refer to REMOVAL [10/2017 - 09/2019]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      A16-11 (TNS) - C-9 (TURN+) Always Below 1 Ω
      A16-12 (GND) - C-13 (TURN-) Always Below 1 Ω
      A16-11 (TNS) - A16-12 (GND) Always 10 kΩ or higher
      GTY758400Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Headlight ECU sub-assembly LH)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [02/2017 - 08/2020] 

    Result: 

    NG 

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY. Refer to  REMOVAL [10/2017 - 09/2019] 

  11. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY OR BODY GROUND) 
    1. Disconnect the A11 headlight assembly LH connector.
    2. Disconnect the F5 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the chart below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A11-4 (B) - F5-13 (LL) Always Below 1 Ω
      A11-6 (E) - Body ground Always Below 1 Ω
      A11-4 (B) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [02/2017 - 08/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  12. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - OUTER REAR VIEW MIRROR ASSEMBLY LH OR BODY GROUND) 
    1. Disconnect the F5 combination meter assembly connector.
    2. Disconnect the J7 outer rear view mirror assembly LH connector.
    3. Measure the resistance according to the value(s) in the chart below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J7-1 (B) - F5-13 (LL) Always Below 1 Ω
      J7-2 (E) - Body ground Always Below 1 Ω
      J7-1 (B) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [02/2017 - 08/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  13. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY OR BODY GROUND) 
    1. Disconnect the M48 rear combination light assembly LH connector.
    2. Disconnect the F5 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the chart below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F5-6 (TRNL) - M48-4 (TRN) Always Below 1 Ω
      M48-3 (E) - Body ground Always Below 1 Ω
      M48-4 (TRN) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [02/2017 - 08/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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