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Home >> Toyota >> 2021 >> Prius LE AWD-e >> 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 [11/2015 - 12/2018] >> Procedure

DTC B1507: Open in Turn Signal Circuit; DTC B1508: Short in Turn Signal / Hazard Flasher Circuit [11/2015 - 12/2018]: Procedure

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

      Result

      Result Proceed to
      All RH turn signal lights do not blink. A
      All LH turn signal lights do not blink. B
      RH side turn signal light does not blink or flash at the correct speed. C
      LH side turn signal light does not blink or flash at the correct speed. D

    Result: 

    B 

    See step  4

    Result: 

    C 

    See step  6

    Result: 

    D 

    See step  14

    Result: 

    A 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY (METER CIRCUIT PLATE) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OR BODY GROUND) 
    1. Disconnect the F7 combination meter assembly (meter circuit plate) connector.
    2. Disconnect the 3A instrument panel junction block assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      F7-7 (TRNR) - 3A-4 Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      F7-7 (TRNR) or 3A-4 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

  3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    1. Remove the instrument panel junction block assembly.

      HINT: 

      Refer to REMOVAL [11/2015 - 12/2018]

      GTY588103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Instrument Panel Junction Block Assembly)      		 - -
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3A-4 - 3F-8 Always Below 1 Ω
      3A-4 - 3H-17 Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY (METER CIRCUIT PLATE). Refer to  DISASSEMBLY [11/2015 -] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [11/2015 - 12/2018] 

  4. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY (METER CIRCUIT PLATE) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OR BODY GROUND) 
    1. Disconnect the F7 combination meter assembly (meter circuit plate) connector.
    2. Disconnect the 3A instrument panel junction block assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      F7-13 (TRNL) - 3A-5 Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      F7-13 (TRNL) or 3A-5 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    1. Remove the instrument panel junction block assembly.

      HINT: 

      Refer to REMOVAL [11/2015 - 12/2018]

      GTY588103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Instrument Panel Junction Block Assembly)      		 - -
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3A-5 - 3F-6 Always Below 1 Ω
      3A-5 - 3H-13 Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY (METER CIRCUIT PLATE). Refer to  DISASSEMBLY [11/2015 -] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [11/2015 - 12/2018] 

  6. CHECK TURN SIGNAL LIGHTS (RH SIDE) 
    1. Turn the power switch on (IG).
    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 RH does not blink or flash at the correct speed. A
      Rear turn signal light RH does not blink or flash at the correct speed. B

    Result: 

    B 

    See step  12

    Result: 

    A 

    See step  7

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

      Result

      Result Proceed to
      w/ Front Fog Light A
      w/o Front Fog Light B

    Result: 

    B 

    See step  10

    Result: 

    A 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OR BODY GROUND) 
    1. Disconnect the A13 headlight assembly RH connector.
    2. Disconnect the 3F instrument panel junction block assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      A13-1 (B) - 3F-8 Always Below 1 Ω
      A13-2 (E) - Body ground Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A13-1 (B) or 3F-8 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  9

  9. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    1. Remove the instrument panel junction block assembly.

      HINT: 

      Refer to REMOVAL [11/2015 - 12/2018]

    2. Measure the resistance according to the value(s) in the table below.
      GTY582840Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Instrument Panel Junction Block Assembly)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      3A-4 - 3F-8 Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT ASSEMBLY RH. Refer to  REMOVAL [11/2015 - 12/2018] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [11/2015 - 12/2018] 

  10. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OR BODY GROUND) 
    1. Disconnect the A14 headlight assembly RH connector.
    2. Disconnect the 3F instrument panel junction block assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      A14-1 (B) - 3F-8 Always Below 1 Ω
      A14-2 (E) - Body ground Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A14-1 (B) or 3F-8 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  11

  11. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    1. Remove the instrument panel junction block assembly.

      HINT: 

      Refer to REMOVAL [11/2015 - 12/2018]

    2. Measure the resistance according to the value(s) in the table below.
      GTY582840Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Instrument Panel Junction Block Assembly)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      3A-4 - 3F-8 Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT ASSEMBLY RH. Refer to  REMOVAL [11/2015 - 12/2018] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [11/2015 - 12/2018] 

  12. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY RH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OR BODY GROUND) 
    1. Disconnect the M42 rear combination light assembly RH connector.
    2. Disconnect the 3H instrument panel junction block assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      M42-3 (B) - 3H-17 Always Below 1 Ω
      M42-2 (E) - Body ground Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      M42-3 (B) or 3H-17 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  13

  13. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    1. Remove the instrument panel junction block assembly.

      HINT: 

      Refer to REMOVAL [11/2015 - 12/2018]

    2. Measure the resistance according to the value(s) in the table below.
      GTY605406Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Instrument Panel Junction Block Assembly)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      3A-4 - 3H-17 Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE REAR COMBINATION LIGHT ASSEMBLY RH. Refer to  REMOVAL [11/2015 - 12/2018] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [11/2015 - 12/2018] 

  14. CHECK TURN SIGNAL LIGHTS (LH SIDE) 
    1. Turn the power switch on (IG).
    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 LH does not blink or flash at the correct speed. A
      Rear turn signal light LH does not blink or flash at the correct speed. B

    Result: 

    B 

    See step  20

    Result: 

    A 

    See step  15

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

      Result

      Result Proceed to
      w/ Front Fog Light A
      w/o Front Fog Light B

    Result: 

    B 

    See step  18

    Result: 

    A 

    See step  16

  16. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OR BODY GROUND) 
    1. Disconnect the A27 headlight assembly LH connector.
    2. Disconnect the 3F instrument panel junction block assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      A27-1 (B) - 3F-6 Always Below 1 Ω
      A27-2 (E) - Body ground Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A27-1 (B) or 3F-6 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  17

  17. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    1. Remove the instrument panel junction block assembly.

      HINT: 

      Refer to REMOVAL [11/2015 - 12/2018]

    2. Measure the resistance according to the value(s) in the table below.
      GTY582840Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Instrument Panel Junction Block Assembly)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      3A-5 - 3F-6 Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT ASSEMBLY LH. Refer to  REMOVAL [11/2015 - 12/2018] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [11/2015 - 12/2018] 

  18. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OR BODY GROUND) 
    1. Disconnect the A28 headlight assembly LH connector.
    2. Disconnect the 3F instrument panel junction block assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      A28-1 (B) - 3F-6 Always Below 1 Ω
      A28-2 (E) - Body ground Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A28-1 (B) or 3F-6 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  19

  19. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    1. Remove the instrument panel junction block assembly.

      HINT: 

      Refer to REMOVAL [11/2015 - 12/2018]

    2. Measure the resistance according to the value(s) in the table below.
      GTY582840Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Instrument Panel Junction Block Assembly)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      3A-5 - 3F-6 Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT ASSEMBLY LH. Refer to  REMOVAL [11/2015 - 12/2018] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [11/2015 - 12/2018] 

  20. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OR BODY GROUND) 
    1. Disconnect the M43 rear combination light assembly LH connector.
    2. Disconnect the 3H instrument panel junction block assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      M43-3 (B) - 3H-13 Always Below 1 Ω
      M43-2 (E) - Body ground Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      M43-3 (B) or 3H-13 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  21

  21. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    1. Remove the instrument panel junction block assembly.

      HINT: 

      Refer to REMOVAL [11/2015 - 12/2018]

    2. Measure the resistance according to the value(s) in the table below.
      GTY605406Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Instrument Panel Junction Block Assembly)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      3A-5 - 3H-13 Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE REAR COMBINATION LIGHT ASSEMBLY LH. Refer to  REMOVAL [11/2015 - 12/2018] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [11/2015 - 12/2018] 

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