NAVIGATION SYSTEM(for Navigation Receiver Type), Diagnostic DTC:B15D0

DTC Code DTC Name
B15D0 MOST Communication Malfunction

DESCRIPTION

This DTC is stored when the MOST network cannot be established after the master unit is activated.

DTC No. Detection Item DTC Detection Condition Trouble Area
B15D0 MOST Communication Malfunction MOST network cannot be established.

  • MOST line check

  • MOST communication line connector

  • MOST communication line

  • Stereo component amplifier assembly

  • Television display assembly

  • Navigation receiver assembly

Tech Tips


  • For the MOST network, the navigation receiver assembly is the master unit.

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

WIRING DIAGRAM

B006KZ9E01

CAUTION / NOTICE / HINT

Note

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System.

Click here

PROCEDURE


  1. CHECK DTC


    1. If DTC B15C3 is output, perform troubleshooting for DTC B15C3 first.

      Result
      Result Proceed to
      DTC B15C3 is not output. A
      DTC B15C3 is output. B

    B

    GO TO DTC B15C3 Click here

    A

  2. PERFORM MOST LINE CHECK


    1. B006L7BC01
      *a Node position number for devices that use MOST communication
      *b Device Name
      *c Result

      Display the "MOST Line Check" screen.

    2. Check the result on the "MOST Line Check" screen.

      Result
      Result Proceed to
      "NCON" is displayed for "AMP". A
      "NCON" is displayed for "REAR". B
      "OK" is displayed for all items. C

      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 "MOST Line Check" screen can be displayed only when DTC B15D0 is stored.


    B

    CHECK COMMUNICATION CONNECTORS Click here

    C

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

    A

  3. CHECK COMMUNICATION CONNECTORS


    1. Check the MOST communication line connectors.


      1. Check if the MOST communication line connector between the navigation receiver assembly and stereo component amplifier assembly has any connection problems.

        Click here

    2. Display the "MOST Line Check" screen and check the result.

      Click here

      Result
      Result Proceed to
      "NCON" is displayed for "AMP". A
      The screen cannot be changed to the "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

  4. CHECK HARNESS AND CONNECTOR (WAKE-UP SIGNAL)


    1. Disconnect the F30 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
      F30-8 (WUI) - Body ground Engine switch on (ACC) 4.5 V or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Click here

    NG

  5. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY)


    1. Disconnect the F29 navigation receiver assembly connector.

    2. Disconnect the F30 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
      F30-8 (WUI) - F29-1 (WUO) Always Below 1 Ω
      F30-8 (WUI) or F29-1 (WUO) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. CHECK COMMUNICATION CONNECTORS


    1. Check the MOST communication line connectors.


      1. Check if the MOST communication line connector between the television display assembly and stereo component amplifier assembly has any connection problems.

        Click here

    2. Display the "MOST Line Check" screen and check the result.

      Click here

      Result
      Result Proceed to
      "NCON" is displayed for "REAR". A
      The screen cannot be changed to the "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

  7. CHECK HARNESS AND CONNECTOR (WAKE-UP SIGNAL)


    1. Disconnect the S39 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
      S39-8 (WUI) - Body ground Engine switch on (ACC) 4.5 V or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TELEVISION DISPLAY ASSEMBLY Click here

    NG

  8. CHECK HARNESS AND CONNECTOR (TELEVISION DISPLAY ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY)


    1. Disconnect the S39 television display assembly connector.

    2. Disconnect the F30 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
      S39-8 (WUI) - F30-1 (WUO) Always Below 1 Ω
      S39-8 (WUI) or F30-1 (WUO) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY)


    1. Disconnect the F29 navigation receiver assembly connector.

    2. Disconnect the F30 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
      F29-5 (MO+) - F30-2 (MI+) Always Below 1 Ω
      F29-6 (MO-) - F30-3 (MI-) Always Below 1 Ω
      F29-7 (SLDO) - F30-4 (SLDI) Always Below 1 Ω
      F29-1 (WUO) - F30-8 (WUI) Always Below 1 Ω
      F29-5 (MO+) or F30-2 (MI+) - Body ground Always 10 kΩ or higher
      F29-6 (MO-) or F30-3 (MI-) - Body ground Always 10 kΩ or higher
      F29-7 (SLDO) or F30-4 (SLDI) - Body ground Always 10 kΩ or higher
      F29-1 (WUO) or F30-8 (WUI) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK HARNESS AND CONNECTOR (TELEVISION DISPLAY ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY)


    1. Disconnect the S39 television display assembly connector.

    2. Disconnect the F30 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
      F30-5 (MO+) - S39-2 (MI+) Always Below 1 Ω
      F30-6 (MO-) - S39-3 (MI-) Always Below 1 Ω
      F30-7 (SLDO) - S39-4 (SLDI) Always Below 1 Ω
      F30-1 (WUO) - S39-8 (WUI) Always Below 1 Ω
      F30-5 (MO+) or S39-2 (MI+) - Body ground Always 10 kΩ or higher
      F30-6 (MO-) or S39-3 (MI-) - Body ground Always 10 kΩ or higher
      F30-7 (SLDO) or S39-4 (SLDI) - Body ground Always 10 kΩ or higher
      F30-1 (WUO) or S39-8 (WUI) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - TELEVISION DISPLAY ASSEMBLY)


    1. Disconnect the F29 navigation receiver assembly connector.

    2. Disconnect the S39 television display assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F29-2 (MI+) - S39-5 (MO+) Always Below 1 Ω
      F29-3 (MI-) - S39-6 (MO-) Always Below 1 Ω
      F29-4 (SLDI) - S39-7 (SLDO) Always Below 1 Ω
      F29-2 (MI+) or S39-5 (MO+) - Body ground Always 10 kΩ or higher
      F29-3 (MI-) or S39-6 (MO-) - Body ground Always 10 kΩ or higher
      F29-4 (SLDI) or S39-7 (SLDO) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. REPLACE TELEVISION DISPLAY ASSEMBLY


    1. Replace the television display assembly.

      Click here

    2. Clear the DTCs.

      Click here


      Body Electrical > Navigation System > Clear DTCs

    3. Recheck for DTCs and check that no DTCs are output.


      Body Electrical > Navigation System > Trouble Codes
      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

  13. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY


    1. Replace the stereo component amplifier assembly.

      Click here

    2. Clear the DTCs.

      Click here


      Body Electrical > Navigation System > Clear DTCs

    3. Recheck for DTCs and check that no DTCs are output.


      Body Electrical > Navigation System > Trouble Codes
      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here