NAVIGATION SYSTEM, 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. DTC Detection Condition Trouble Area
B15D0 MOST network cannot be established.

  • MOST circuit between multi-media module receiver assembly and stereo component amplifier assembly

  • Stereo component amplifier assembly

  • Multi-media module receiver assembly

Tech Tips


  • For the MOST network, the multi-media module receiver assembly is the master unit.

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

WIRING DIAGRAM

A003ZHBE02

INSPECTION PROCEDURE

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 the troubleshooting of 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. A003WBKE01
      Text in Illustration
      *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
      "OK" is displayed for all items. B

      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 HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY) Click here

    A

  3. CHECK MOST COMMUNICATION CONNECTORS


    1. Check the MOST communication line connectors.


      1. Check if the MOST communication line connector between the multi-media module 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 H151 stereo component amplifier assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H151-8 (WUI) - Body ground Power switch on (ACC) 4.5 V or higher

    NG

    CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - MULTI-MEDIA MODULE RECEIVER ASSEMBLY) Click here

    OK

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Click here

  5. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - MULTI-MEDIA MODULE RECEIVER ASSEMBLY)


    1. Disconnect the H151 stereo component amplifier assembly connector.

    2. Disconnect the H150 multi-media module receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H151-8 (WUI) - H150-1 (WUO) Always Below 1 Ω
      H151-8 (WUI) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

  6. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY)


    1. Disconnect the H150 multi-media module receiver assembly connector.

    2. Disconnect the H151 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
      H150-5 (MO+) - H151-2 (MI+) Always Below 1 Ω
      H150-6 (MO-) - H151-3 (MI-) Always Below 1 Ω
      H150-7 (SLDO) - H151-4 (SLDI) Always Below 1 Ω
      H150-1 (WUO) - H151-8 (WUI) Always Below 1 Ω
      H150-2 (MI+) - H151-5 (MO+) Always Below 1 Ω
      H150-3 (MI-) - H151-6 (MO-) Always Below 1 Ω
      H150-4 (SLDI) - H151-7 (SLDO) Always Below 1 Ω
      H150-5 (MO+) - Body ground Always 10 kΩ or higher
      H150-6 (MO-) - Body ground Always 10 kΩ or higher
      H150-7 (SLDO) - Body ground Always 10 kΩ or higher
      H150-1 (WUO) - Body ground Always 10 kΩ or higher
      H150-2 (MI+) - Body ground Always 10 kΩ or higher
      H150-3 (MI-) - Body ground Always 10 kΩ or higher
      H150-4 (SLDI) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY


    1. Replace the stereo component amplifier assembly Click here.

    2. Clear the DTCs Click here.

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

      OK
      No DTCs are output.

    NG

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

    OK

    END