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Home >> Audi >> 2015 >> A4 Prestige >> Repair and Diagnosis >> External Pages >> Different car >> Section 435 (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 [08/2013 - ] >> Procedure

DTC B1507: Open in Turn Signal Circuit; DTC B1508: Short in Turn Signal / Hazard Flasher Circuit [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT LIGHTS 
    1. Inspect the illumination of each turn signal light.

      Result

      Result Proceed to
      Turn signal lights for one side do not illuminate. A
      Front turn signal light does not illuminate. B
      Rear turn signal light does not illuminate. C
      Side turn signal light does not illuminate (w/o Seat position memory). D
      Side turn signal light does not illuminate (w/ Seat position memory). E

    B → See step   3 

    C → See step   4 

    D → See step   5 

    E → See step   6 

    A: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 
    1. Disconnect the H13 combination meter assembly 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)

      FOR LH

      Tester Connection Condition Specified Condition
      H13-7 (LL) - 3A-20 Always Below 1 Ω
      FOR RH

      Tester Connection Condition Specified Condition
      H13-13 (LR) - 3A-37 Always Below 1 Ω

      Standard Resistance (Check for Short)

      FOR LH

      Tester Connection Condition Specified Condition
      H13-7 (LL) - Body ground Always 10 kΩ or higher
      FOR RH

      Tester Connection Condition Specified Condition
      H13-13 (LR) - Body ground Always 10 kΩ or higher

      Result

      Result Proceed to
      NG A
      OK B

    B → See step   7 

    A → REPAIR OR REPLACE HARNESS OR CONNECTOR 

  3. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 
    1. except Korea
      1. Disconnect the A20*1 or A53*2 headlight assembly connector.
        • *1: for LH
        • *2: for RH
      2. Disconnect the 3D instrument panel junction block assembly connector.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance (Check for Open)

        FOR LH

        Tester Connection Condition Specified Condition
        A20-1 (B) - 3D-10 Always Below 1 Ω
        A20-2 (E) - Body ground Always Below 1 Ω
        FOR RH

        Tester Connection Condition Specified Condition
        A53-1 (B) - 3D-5 Always Below 1 Ω
        A53-2 (E) - Body ground Always Below 1 Ω

        Standard Resistance (Check for Short)

        FOR LH

        Tester Connection Condition Specified Condition
        A20-1 (B) - Body ground Always 10 kΩ or higher
        FOR RH

        Tester Connection Condition Specified Condition
        A53-1 (B) - Body ground Always 10 kΩ or higher

        Result

        Result Proceed to
        NG A
        OK B
    2. for Korea
      1. Disconnect the A64*1 or A65*2 headlight assembly connector.
        • *1: for LH
        • *2: for RH
      2. Disconnect the 3D instrument panel junction block assembly connector.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance (Check for Open)

        FOR LH

        Tester Connection Condition Specified Condition
        A64-2 (B) - 3D-10 Always Below 1 Ω
        A64-1 (E) - Body ground Always Below 1 Ω
        FOR RH

        Tester Connection Condition Specified Condition
        A65-2 (B) - 3D-5 Always Below 1 Ω
        A65-1 (E) - Body ground Always Below 1 Ω

        Standard Resistance (Check for Short)

        FOR LH

        Tester Connection Condition Specified Condition
        A64-2 (B) - Body ground Always 10 kΩ or higher
        FOR RH

        Tester Connection Condition Specified Condition
        A65-2 (B) - Body ground Always 10 kΩ or higher

        Result

        Result Proceed to
        NG A
        OK B

    B → See step   7 

    A → REPAIR OR REPLACE HARNESS OR CONNECTOR 

  4. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 
    1. Disconnect the U13*1 or U12*2 rear combination light assembly connector.
      • *1: for LH
      • *2: for RH
    2. Disconnect the 3C instrument panel junction block assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      FOR LH

      Tester Connection Condition Specified Condition
      U13-5 (TRN) - 3C-22 Always Below 1 Ω
      U13-6 (E) - Body ground Always Below 1 Ω
      FOR RH

      Tester Connection Condition Specified Condition
      U12-5 (TRN) - 3C-19 Always Below 1 Ω
      U12-6 (E) - Body ground Always Below 1 Ω

      Standard Resistance (Check for Short)

      FOR LH

      Tester Connection Condition Specified Condition
      U13-5 (TRN) - Body ground Always 10 kΩ or higher
      FOR RH

      Tester Connection Condition Specified Condition
      U12-5 (TRN) - Body ground Always 10 kΩ or higher

      Result

      Result Proceed to
      NG A
      OK B

    B → See step   7 

    A → REPAIR OR REPLACE HARNESS OR CONNECTOR 

  5. CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 
    1. Disconnect the M6*1 or L7*2 outer rear view mirror assembly connector.
      • *1: for LH
      • *2: for RH
    2. Disconnect the 3A and 3B instrument panel junction block assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      FOR LH

      Tester Connection Condition Specified Condition
      M6-16 (B) - 3A-40 Always Below 1 Ω
      M6-12 (-) - Body ground Always Below 1 Ω
      FOR RH

      Tester Connection Condition Specified Condition
      L7-16 (B) - 3B-32 Always Below 1 Ω
      L7-12 (-) - Body ground Always Below 1 Ω

      Standard Resistance (Check for Short)

      FOR LH

      Tester Connection Condition Specified Condition
      M6-16 (B) - Body ground Always 10 kΩ or higher
      FOR RH

      Tester Connection Condition Specified Condition
      L7-16 (B) - Body ground Always 10 kΩ or higher

      Result

      Result Proceed to
      NG A
      OK B

    B → See step   7 

    A → REPAIR OR REPLACE HARNESS OR CONNECTOR 

  6. CHECK HARNESS AND CONNECTOR (OUTER MIRROR CONTROL ECU ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 
    1. Disconnect the M9*1 or L10*2 outer mirror control ECU assembly connector.
      • *1: for LH
      • *2: for RH
    2. Disconnect the 3A or 3B instrument panel junction block assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      FOR LH

      Tester Connection Condition Specified Condition
      M9-11 (TRNI) - 3A-40 Always Below 1 Ω
      M9-7 (GND) - Body ground Always Below 1 Ω
      FOR RH

      Tester Connection Condition Specified Condition
      L10-11 (TRNI) - 3B-32 Always Below 1 Ω
      L10-7 (GND) - Body ground Always Below 1 Ω

      Standard Resistance (Check for Short)

      FOR LH

      Tester Connection Condition Specified Condition
      M9-11 (TRNI) - Body ground Always 10 kΩ or higher
      FOR RH

      Tester Connection Condition Specified Condition
      L10-11 (TRNI) - Body ground Always 10 kΩ or higher

      Result

      Result Proceed to
      NG A
      OK B

    B → See step   7 

    A → REPAIR OR REPLACE HARNESS OR CONNECTOR 

  7. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Refer to REMOVAL [08/2013 - ] .
      GTY375648Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Instrument Panel Junction Block Assembly)      		 - -
    2. Front turn signal light
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        for LH 

        for RH 

        Tester Connection Condition Specified Condition
        3A-20 - 3D-10 Always Below 1 Ω
        Tester Connection Condition Specified Condition
        3A-37 - 3D-5 Always Below 1 Ω

        Result

        Result Proceed to
        NG A
        OK B
    3. Rear turn signal light
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        for LH 

        for RH 

        Tester Connection Condition Specified Condition
        3A-20 - 3C-22 Always Below 1 Ω
        Tester Connection Condition Specified Condition
        3A-37 - 3C-19 Always Below 1 Ω

        Result

        Result Proceed to
        NG A
        OK B
    4. Side turn signal light
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        for LH 

        for RH 

        Tester Connection Condition Specified Condition
        3A-20 - 3A-40 Always Below 1 Ω
        Tester Connection Condition Specified Condition
        3A-37 - 3B-32 Always Below 1 Ω

        Result

        Result Proceed to
        NG A
        OK (w/o Seat position memory) B
        OK (for LH with seat position memory) C
        OK (for RH with seat position memory) D

    B → See step   10 

    C → See step   8 

    D → See step   9 

    A → See step   11 

  8. REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY LH 
    1. Replace the outer mirror control ECU assembly LH with a new or known good one. Refer to REMOVAL [08/2013 - ] .
    2. Recheck for DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .

      Result

      Result Proceed to
      DTCs are not output. A
      DTCs are output. B

    B → See step   10 

    A → END 

  9. REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY RH 
    1. Replace the outer mirror control ECU assembly RH with a new or known good one. Refer to REMOVAL [08/2013 - ] .
    2. Recheck for DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .

      Result

      Result Proceed to
      DTCs are not output. A
      DTCs are output. B

    B → See step   10 

    A → END 

  10. REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [08/2013 - ] 
  11. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [08/2013 - ] 
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