METER / GAUGE SYSTEM, Diagnostic DTC:B150718

DTC Code DTC Name
B150718 Turn Signal Light Circuit Current Below Threshold

DESCRIPTION

This DTC is stored when the combination meter assembly detects an open in a front turn signal light circuit or rear turn signal light circuit.

Tech Tips


  • If there is an open in a front turn signal light circuit or rear turn signal light circuit, the turn signal lights on the side with the open circuit will blink faster than usual.

  • If there is an open in a side turn signal light circuit, DTC B150718 will not be stored.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note
B150718 Turn Signal Light Circuit Current Below Threshold

Diagnosis Condition:


  • Battery voltage is 10 V or more

Malfunction Status:


  • Open in front turn signal light circuit

  • Open in rear turn signal light circuit

  • Headlight ECU sub-assembly*1

  • Head light unit assembly*1

  • Headlight lens*3

  • Front turn signal light socket*2

  • Rear combination light assembly*4

  • Rear combination light cord*4

  • Rear combination light socket and wire*5

  • Harness or connector

  • Combination meter assembly

 DTC stored -

WIRING DIAGRAM


  1. LH Side

    B00706UE02
    B006WZKE04

  2. RH Side

    B00706UE03
    B006WZKE05

CAUTION / NOTICE / HINT

Note


  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

  • Inspect the turn signal light bulbs before performing the following procedure.

PROCEDURE


  1. INSPECT LIGHTS


    1. Inspect the illumination of each turn signal light.

      Result
      Result Proceed to
      Front turn signal light LH does not blink A
      Rear turn signal light LH does not blink B
      Front turn signal light RH does not blink C
      Rear turn signal light RH does not blink D

    B

    CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) Click here

    C

    CONFIRM MODEL Click here

    D

    CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) Click here

    A

  2. CONFIRM MODEL


    1. Choose the model to be inspected.

      Result
      Result Proceed to
      w/ Automatic Headlight Beam Level Control System A
      w/o Automatic Headlight Beam Level Control System B

    B

    CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) Click here

    A

  3. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND)


    1. Disconnect the A10 headlight assembly LH connector.

    2. Disconnect the K20 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A10-11 (TNS) - K20-11 (LL) Always Below 1 Ω
      A10-12 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HEADLIGHT ECU SUB-ASSEMBLY LH

    B006Y4YC09
    *a

    Component without harness connected

    (Headlight ECU Sub-assembly LH)

    		 - -

    1. Remove the headlight ECU sub-assembly LH.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B-9 (TURN+) - A10-11 (TNS) Always Below 1 Ω
      B-13 (TURN-) - A10-12 (GND) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH Click here

    OK

  5. CHECK HEADLIGHT UNIT ASSEMBLY LH


    1. Remove each headlight ECU sub-assembly, interchange the headlight unit assembly LH with RH and connect the connectors.

      for LED Type Turn Signal Light: Click here

      for Bulb Type Turn Signal Light: Click here

    2. Check that the front turn signal light operates normally.

      OK
      Front turn signal light blinks.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  6. CONFIRM MODEL


    1. Choose the model to be inspected.

      Result
      Result Proceed to
      for LED Type Turn Signal Light A
      for Bulb Type Turn Signal Light B

    B

    REPLACE HEADLIGHT UNIT ASSEMBLY LH Click here

    A

  7. INSPECT HEADLIGHT LENS LH


    1. Remove the headlight lens LH.

      Click here

    2. Inspect the headlight lens LH.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HEADLIGHT UNIT ASSEMBLY LH Click here

    NG

    REPLACE HEADLIGHT LENS LH Click here

  8. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND)


    1. Disconnect the A76 headlight assembly LH connector.

    2. Disconnect the K20 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A76-1 (B) - K20-11 (LL) Always Below 1 Ω
      A76-2 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK FRONT TURN SIGNAL LIGHT SOCKET LH


    1. Interchange the front turn signal light socket LH with RH and connect the connectors.

      Click here

    2. Check that the front turn signal light operates normally.

      OK
      Front turn signal light blinks.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT TURN SIGNAL LIGHT SOCKET LH Click here

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

  10. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND)


    1. Disconnect the W13 rear combination light assembly LH connector.

    2. Disconnect the K20 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      W13-3 (B) - K20-10 (TRNL) Always Below 1 Ω
      W13-4 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CONFIRM MODEL


    1. Choose the model to be inspected.

      Result
      Result Proceed to
      for LED Type Back-up Light A
      for Bulb Type Back-up Light B

    B

    CHECK REAR COMBINATION LIGHT SOCKET AND WIRE LH Click here

    A

  12. CHECK REAR COMBINATION LIGHT CORD LH


    1. Interchange the rear combination light cord LH with RH and connect the connectors.

      Click here

    2. Check that the rear turn signal light operates normally.

      OK
      Rear turn signal light blinks.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR COMBINATION LIGHT CORD LH Click here

    NG

  13. INSPECT REAR COMBINATION LIGHT ASSEMBLY LH


    1. Remove the rear combination light assembly LH.

      Click here

    2. Inspect the rear combination light assembly LH.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPLACE REAR COMBINATION LIGHT ASSEMBLY LH Click here

  14. CHECK REAR COMBINATION LIGHT SOCKET AND WIRE LH


    1. Interchange the rear combination light socket and wire LH with RH and connect the connectors.

      Click here

    2. Check that the rear turn signal light operates normally.

      OK
      Rear turn signal light blinks.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR COMBINATION LIGHT SOCKET AND WIRE LH Click here

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

  15. CONFIRM MODEL


    1. Choose the model to be inspected.

      Result
      Result Proceed to
      w/ Automatic Headlight Beam Level Control System A
      w/o Automatic Headlight Beam Level Control System B

    B

    CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) Click here

    A

  16. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND)


    1. Disconnect the A11 headlight assembly RH connector.

    2. Disconnect the K20 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A11-11 (TNS) - K20-7 (LR) Always Below 1 Ω
      A11-12 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  17. CHECK HEADLIGHT ECU SUB-ASSEMBLY RH

    B006Y4YC10
    *a

    Component without harness connected

    (Headlight ECU Sub-assembly RH)

    		 - -

    1. Remove the headlight ECU sub-assembly RH.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B-9 (TURN+) - A11-11 (TNS) Always Below 1 Ω
      B-13 (TURN-) - A11-12 (GND) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH Click here

    OK

  18. CHECK HEADLIGHT UNIT ASSEMBLY RH


    1. Remove each headlight ECU sub-assembly, interchange the headlight unit assembly RH with LH and connect the connectors.

      for LED Type Turn Signal: Click here

      for Bulb Type Turn Signal Light: Click here

    2. Check that the front turn signal light operates normally.

      OK
      Front turn signal light blinks.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  19. CONFIRM MODEL


    1. Choose the model to be inspected.

      Result
      Result Proceed to
      for LED Type Turn Signal Light A
      for Bulb Type Turn Signal Light B

    B

    REPLACE HEADLIGHT UNIT ASSEMBLY RH Click here

    A

  20. INSPECT HEADLIGHT LENS RH


    1. Remove the headlight lens RH.

      Click here

    2. Inspect the headlight lens RH.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HEADLIGHT UNIT ASSEMBLY RH Click here

    NG

    REPLACE HEAD LIGHT LENS RH Click here

  21. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND)


    1. Disconnect the A75 headlight assembly RH connector.

    2. Disconnect the K20 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A75-1 (B) - K20-7 (LR) Always Below 1 Ω
      A75-2 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  22. CHECK FRONT TURN SIGNAL LIGHT SOCKET RH


    1. Interchange the front turn signal light socket RH with LH and connect the connectors.

      Click here

    2. Check that the front turn signal light operates normally.

      OK
      Front turn signal light blinks.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT TURN SIGNAL LIGHT SOCKET RH Click here

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

  23. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND)


    1. Disconnect the W12 rear combination light assembly RH connector.

    2. Disconnect the K20 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      W12-3 (B) - K20-13 (TRNR) Always Below 1 Ω
      W12-4 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  24. CONFIRM MODEL


    1. Choose the model to be inspected.

      Result
      Result Proceed to
      for LED Type Back-up Light A
      for Bulb Type Back-up Light B

    B

    CHECK REAR COMBINATION LIGHT SOCKET AND WIRE RH Click here

    A

  25. CHECK REAR COMBINATION LIGHT CORD RH


    1. Interchange the rear combination light cord RH with LH and connect the connectors.

      Click here

    2. Check that the rear turn signal light operates normally.

      OK
      Rear turn signal light blinks.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR COMBINATION LIGHT CORD RH Click here

    NG

  26. INSPECT REAR COMBINATION LIGHT ASSEMBLY RH


    1. Remove the rear combination light assembly RH.

      Click here

    2. Inspect the rear combination light assembly RH.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPLACE REAR COMBINATION LIGHT ASSEMBLY RH Click here

  27. CHECK REAR COMBINATION LIGHT SOCKET AND WIRE RH


    1. Interchange the rear combination light socket and wire RH with LH and connect the connectors.

      Click here

    2. Check that the rear turn signal light operates normally.

      OK
      Rear turn signal light blinks.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR COMBINATION LIGHT SOCKET AND WIRE RH Click here

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here