METER / GAUGE SYSTEM, Diagnostic DTC:B1507, B1508

DTC Code DTC Name
B1507 Open in Turn Signal Circuit
B1508 Short in Turn Signal / Hazard Flasher Circuit

DESCRIPTION

These DTCs are stored when the combination meter assembly detects an open in a turn signal light circuit, or a short in a turn signal light circuit or the hazard warning light circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note
B1507 Open in Turn Signal Circuit

When IG voltage is 9.5 V or more and the following condition is detected:


  • Open in turn signal light circuit

  • LED

  • Bulb

  • Harness or connector

  • Instrument panel junction block assembly

  • Outer mirror control ECU assembly LH*1

  • Outer mirror control ECU assembly RH*1

  • Combination meter assembly

 DTC stored -
B1508 Short in Turn Signal / Hazard Flasher Circuit

When IG voltage is 9.5 V or more and the following condition is detected:


  • Short in turn signal light circuit or hazard warning light circuit

  • LED

  • Bulb

  • Harness or connector

  • Instrument panel junction block assembly

  • Outer mirror control ECU assembly LH*1

  • Outer mirror control ECU assembly RH*1

  • Combination meter assembly

 DTC stored -

WIRING DIAGRAM

Figure 1. w/ Seat Position Memory:

A01MRU4E03

Figure 2. w/o Seat Position Memory:

A01MSLME01

CAUTION / NOTICE / HINT

Note

Inspect the LEDs and bulbs for this system before performing the following procedure.

PROCEDURE


  1. INSPECT LIGHTS


    1. Inspect the illumination of each turn signal light.

      Result
      Result Proceed to
      All RH turn signal lights or all LH turn signal lights do not blink. A
      RH side turn signal light does not illuminate. B
      LH side turn signal light does not illuminate. C

    B

    CHECK TURN SIGNAL LIGHTS (RH SIDE) Click here

    C

    CHECK TURN SIGNAL LIGHTS (LH SIDE) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OR BODY GROUND)


    1. RH side


      1. Disconnect the K4 combination meter assembly connector.

      2. Disconnect the 4A instrument panel junction block assembly connector.

      3. Disconnect the N9 outer mirror control ECU assembly RH connector*1.

      4. Disconnect the N8 side turn signal light assembly RH connector*2.


        • *1: w/ Seat Position Memory

        • *2: w/o Seat Position Memory

      5. Measure the resistance according to the value(s) in the table below.

        Standard Resistance (Check for Open)
        Tester Connection Condition Specified Condition
        K4-7 (LR) - 4A-5 Always Below 1 Ω
        Standard Resistance (Check for Short)
        Tester Connection Condition Specified Condition
        K4-7 (LR) - Body ground Always 10 kΩ or higher

    2. LH side


      1. Disconnect the K4 combination meter assembly connector.

      2. Disconnect the 4A instrument panel junction block assembly connector.

      3. Disconnect the N24 outer mirror control ECU assembly LH connector*1.

      4. Disconnect the N23 side turn signal light assembly LH connector*2.


        • *1: w/ Seat Position Memory

        • *2: w/o Seat Position Memory

      5. Measure the resistance according to the value(s) in the table below.

        Standard Resistance (Check for Open)
        Tester Connection Condition Specified Condition
        K4-13 (LL) - 4A-6 Always Below 1 Ω
        Standard Resistance (Check for Short)
        Tester Connection Condition Specified Condition
        K4-13 (LL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. 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 assembly (RH side) does not blink. A
      Side turn signal light assembly (RH side) does not blink. B
      Rear turn signal light assembly (RH side) does not blink. C

    B

    CONFIRM MODEL Click here

    C

    CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY RH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OR BODY GROUND) Click here

    A

  4. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OR BODY GROUND)


    1. Disconnect the A1 headlight assembly RH connector.

    2. Disconnect the 4C 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
      A1-6 (B) - 4C-8 Always Below 1 Ω
      A1-3 (E) - Body ground Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A1-6 (B) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly.

      Click here

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

      A0023A5C05
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      4A-5 - 4C-8 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

  6. CONFIRM MODEL

    Result
    Result Proceed to
    w/ Seat Position Memory A
    w/o Seat Position Memory B

    B

    CHECK HARNESS AND CONNECTOR (SIDE TURN SIGNAL LIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY OR BODY GROUND) Click here

    A

  7. CHECK HARNESS AND CONNECTOR (OUTER MIRROR CONTROL ECU ASSEMBLY RH - COMBINATION METER ASSEMBLY OR BODY GROUND)


    1. Disconnect the K4 combination meter assembly connector.

    2. Disconnect the N9 outer mirror control ECU assembly RH connector.

    3. Disconnect the 4A instrument panel junction block assembly connector.

    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      N9-11 (TRNI) - K4-7 (LR) Always Below 1 Ω
      N9-7 (GND) - Body ground Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      K4-7 (LR) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY RH


    1. Replace the outer mirror control ECU assembly RH with a new or known good one.

      Click here

    2. Check for the DTCs.


      Body Electrical > Combination Meter > Trouble Codes

      Click here

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

    A

    REPLACE COMBINATION METER ASSEMBLY Click here

    B

    END

  9. CHECK HARNESS AND CONNECTOR (SIDE TURN SIGNAL LIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY OR BODY GROUND)


    1. Disconnect the K4 combination meter assembly connector.

    2. Disconnect the N8 side turn signal light assembly RH connector.

    3. Disconnect the 4A instrument panel junction block assembly connector.

    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      N8-16 (B) - K4-7 (LR) Always Below 1 Ω
      N8-12 (-) - Body ground Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      K4-7 (LR) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY RH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OR BODY GROUND)


    1. Disconnect the Q5 rear combination light assembly RH connector.

    2. Disconnect the 4D 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
      Q5-4 (TRN) - 4D-18 Always Below 1 Ω
      Q5-6 (E) - Body ground Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      Q5-4 (TRN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly.

      Click here

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

      A01MSSLC04
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      4A-5 - 4D-18 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

  12. 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 assembly (LH side) does not blink. A
      Side turn signal light assembly (LH side) does not blink. B
      Rear turn signal light assembly (LH side) does not blink. C

    B

    CONFIRM MODEL Click here

    C

    CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OR BODY GROUND) Click here

    A

  13. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OR BODY GROUND)


    1. Disconnect the A33 headlight assembly LH connector.

    2. Disconnect the 4C 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
      A33-6 (B) - 4C-6 Always Below 1 Ω
      A33-3 (E) - Body ground Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A33-6 (B) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly.

      Click here

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

      A0023A5C05
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      4A-6 - 4C-6 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

  15. CONFIRM MODEL

    Result
    Result Proceed to
    w/ Seat Position Memory A
    w/o Seat Position Memory B

    B

    CHECK HARNESS AND CONNECTOR (SIDE TURN SIGNAL LIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY OR BODY GROUND) Click here

    A

  16. CHECK HARNESS AND CONNECTOR (OUTER MIRROR CONTROL ECU ASSEMBLY LH - COMBINATION METER ASSEMBLY OR BODY GROUND)


    1. Disconnect the K4 combination meter assembly connector.

    2. Disconnect the N24 outer mirror control ECU assembly LH connector.

    3. Disconnect the 4A instrument panel junction block assembly connector.

    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      N24-11 (TRNI) - K4-13 (LL) Always Below 1 Ω
      N24-7 (GND) - Body ground Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      K4-13 (LL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  17. REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY LH


    1. Replace the outer mirror control ECU assembly LH with a new or known good one.

      Click here

    2. Check for the DTCs.


      Body Electrical > Combination Meter > Trouble Codes

      Click here

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

    A

    REPLACE COMBINATION METER ASSEMBLY Click here

    B

    END

  18. CHECK HARNESS AND CONNECTOR (SIDE TURN SIGNAL LIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY OR BODY GROUND)


    1. Disconnect the K4 combination meter assembly connector.

    2. Disconnect the N23 side turn signal light assembly LH connector.

    3. Disconnect the 4A instrument panel junction block assembly connector.

    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      N23-16 (B) - K4-13 (LL) Always Below 1 Ω
      N23-12 (-) - Body ground Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      K4-13 (LL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  19. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OR BODY GROUND)


    1. Disconnect the Q43 rear combination light assembly LH connector.

    2. Disconnect the 4D 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
      Q43-4 (TRN) - 4D-17 Always Below 1 Ω
      Q43-6 (E) - Body ground Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      Q43-4 (TRN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  20. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly.

      Click here

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

      A01MSSLC04
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      4A-6 - 4D-17 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here