NAVIGATION SYSTEM (for HDD), Diagnostic DTC:B15D0

DTC Code DTC Name
B15D0 MOST Communication Malfunction

DESCRIPTION


DTC Code DTC Detection Condition Trouble Area
B15D0 The MOST network connections cannot be established.

  • MOST line check

  • MOST communication line connector

  • Harness or connector

  • MOST communication line

  • Display and navigation module display

  • Stereo component amplifier assembly

  • Radio receiver assembly

  • Television display assembly*

Tech Tips


  • The MOST network connections cannot be established.

  • Errors may occur in MOST communication between devices due to problems such as electrical noise.

WIRING DIAGRAM

A00971ME01
A009B4GE01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK MOST LINE


    1. A009690E01
      Text in Illustration
      *a Node position number for devices that use MOST communication
      *b Device Name
      *c Result

      Enter "System Check" Click here.

    2. Check the result on the "System Check Mode" screen.

      Result
      Result Proceed to
      "NCON" is displayed for "AMP" A
      "NCON" is displayed for "AUDIO" B
      "NCON" is displayed for "RSE"* C
      "OK" is displayed for all items D

      • *: w/ Rear Seat Entertainment System

      Tech Tips


      • When "NCON" is displayed for more than 1 item, proceed to the step for the device that has the smallest node position number.

      • The "System Check Mode" screen can be displayed only when DTC B15D0 is stored.


    B

    CHECK MOST COMMUNICATION CONNECTOR Click here

    C

    CHECK MOST COMMUNICATION CONNECTOR Click here

    D

    CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - STEREO COMPONENT AMPLIFIER) Click here

    A

  2. CHECK MOST COMMUNICATION CONNECTOR


    1. Check the MOST communication line connector.


      1. Check if the MOST communication line connectors of the display and navigation module display and the stereo component amplifier assembly have any connection problems Click here.

    2. Enter the "System Check Mode" screen and check the result Click here.

      Result
      Result Proceed to
      "NCON" is displayed for "AMP" A
      Screen cannot be changed to "MOST Line Check" screen B

      Tech Tips

      When the malfunction in the MOST network is repaired, the screen cannot be changed to the "MOST Line Check" screen.


    B

    END

    A

  3. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER)


    1. A00967OE04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Stereo Component Amplifier Assembly)

      Disconnect the H11 stereo component amplifier assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      H11-3 (WUI) - Body ground Ignition switch ACC 4.5 V or higher

    NG

    CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - DISPLAY AND NAVIGATION MODULE DISPLAY) Click here

    OK

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Click here

  4. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - DISPLAY AND NAVIGATION MODULE DISPLAY)


    1. Disconnect the H11 stereo component amplifier assembly connector.

    2. Disconnect the H2 display and navigation module display connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H11-3 (WUI) - H2-8 (WUO) Always Below 1 Ω
      H11-3 (WUI) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Click here

  5. CHECK MOST COMMUNICATION CONNECTOR


    1. Check the MOST communication line connector.


      1. Check if the MOST communication line connectors of the stereo component amplifier assembly and radio receiver assembly have any connection problems Click here.

    2. Enter the "System Check Mode" screen and check the result Click here.

      Result
      Result Proceed to
      "NCON" is displayed for "AUDIO" A
      Screen cannot be changed to "MOST Line Check" screen B

      Tech Tips

      When the malfunction in the MOST network is repaired, the screen cannot be changed to the "MOST Line Check" screen.


    B

    END

    A

  6. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER)


    1. A0099JSE17
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Radio Receiver Assembly)

      Disconnect the H1 radio receiver assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      H1-12 (WUI) - Body ground Ignition switch ACC 4.5 V or higher

    NG

    CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER) Click here

    OK

    REPLACE RADIO RECEIVER ASSEMBLY Click here

  7. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER)


    1. Disconnect the H1 radio receiver assembly connector.

    2. Disconnect the H11 stereo component amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H1-12 (WUI) - H11-9 (WUO) Always Below 1 Ω
      H1-12 (WUI) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Click here

  8. CHECK MOST COMMUNICATION CONNECTOR


    1. Check the MOST communication line connector.


      1. Check the MOST communication line connectors of the radio receiver assembly and television display assembly Click here.

    2. Enter the "System Check Mode" screen and check the result Click here.

      Result
      Result Proceed to
      "NCON" is displayed for "RSE" A
      Screen cannot be changed to "MOST Line Check" screen B

      Tech Tips

      When the malfunction in the MOST network is repaired, the screen cannot be changed to the "MOST Line Check" screen.


    NG

    END

    OK

  9. CHECK HARNESS AND CONNECTOR (TELEVISION DISPLAY)


    1. A0099JSE18
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Television Display Assembly)

      Disconnect the W14 television display assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      W14-7 (WUI) - Body ground Ignition switch ACC 4.5 V or higher

    NG

    CHECK HARNESS AND CONNECTOR (TELEVISION DISPLAY - RADIO RECEIVER) Click here

    OK

    REPLACE TELEVISION DISPLAY ASSEMBLY Click here

  10. CHECK HARNESS AND CONNECTOR (TELEVISION DISPLAY - RADIO RECEIVER)


    1. Disconnect the W14 television display assembly connector.

    2. Disconnect the H1 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      W14-7 (WUI) - H1-26 (WUO) Always Below 1 Ω
      W14-7 (WUI) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Click here

  11. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - STEREO COMPONENT AMPLIFIER)


    1. Disconnect the H2 display and navigation module display connector.

    2. Disconnect the H11 stereo component amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H2-3 (MO+) - H11-4 (MI+) Always Below 1 Ω
      H2-7 (MO-) - H11-10 (MI-) Always Below 1 Ω
      H2-6 (SLDO) - H11-5 (SLDI) Always Below 1 Ω
      H2-3 (MO+) - Body ground Always 10 kΩ or higher
      H2-7 (MO-) - Body ground Always 10 kΩ or higher
      H2-6 (SLDO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - RADIO RECEIVER)


    1. Disconnect the H11 stereo component amplifier assembly connector.

    2. Disconnect the H1 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H11-6 (MO+) - H1-9 (MI+) Always Below 1 Ω
      H11-12 (MO-) - H1-23 (MI-) Always Below 1 Ω
      H11-11 (SLDO) - H1-10 (SLDI) Always Below 1 Ω
      H11-6 (MO+) - Body ground Always 10 kΩ or higher
      H11-12 (MO-) - Body ground Always 10 kΩ or higher
      H11-11 (SLDO) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (w/ Rear Entertainment System) A
      OK (w/o Rear Entertainment System) B
      NG C

    B

    CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - DISPLAY AND NAVIGATION MODULE DISPLAY) Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  13. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - TELEVISION DISPLAY)


    1. Disconnect the H1 radio receiver assembly connector.

    2. Disconnect the W14 television display assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H1-11 (MO+) - W14-1 (MI+) Always Below 1 Ω
      H1-25 (MO-) - W14-2 (MI-) Always Below 1 Ω
      H1-24 (SLDI) - W14-3 (SLDI) Always Below 1 Ω
      H1-11 (MO+) - Body ground Always 10 kΩ or higher
      H1-25 (MO-) - Body ground Always 10 kΩ or higher
      H1-24 (SLDI) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. CHECK HARNESS AND CONNECTOR (TELEVISION DISPLAY - DISPLAY AND NAVIGATION MODULE DISPLAY)


    1. Disconnect the W14 television display assembly connector.

    2. Disconnect the H2 display and navigation module display connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      W14-6 (MO+) - H2-1 (MI+) Always Below 1 Ω
      W14-5 (MO-) - H2-5 (MI-) Always Below 1 Ω
      W14-4 (SLDO) - H2-2 (SLDI) Always Below 1 Ω
      W14-6 (MO+) - Body ground Always 10 kΩ or higher
      W14-5 (MO-) - Body ground Always 10 kΩ or higher
      W14-4 (SLDO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  15. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs and check if the same trouble occurs again.

      OK
      No DTCs are output.

    NG

    REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  16. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - DISPLAY AND NAVIGATION MODULE DISPLAY)


    1. Disconnect the H1 radio receiver assembly connector.

    2. Disconnect the H2 display and navigation module display assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H1-11 (MO+) - H2-1 (MI+) Always Below 1 Ω
      H1-25 (MO-) - H2-5 (MI-) Always Below 1 Ω
      H1-24 (SLDI) - H2-2 (SLDI) Always Below 1 Ω
      H1-11 (MO+) - Body ground Always 10 kΩ or higher
      H1-25 (MO-) - Body ground Always 10 kΩ or higher
      H1-24 (SLDI) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  17. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs and check if the same trouble occurs again.

      OK
      No DTCs are output.

    NG

    REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here