NAVIGATION SYSTEM (for DVD), Diagnostic DTC:B1593, B15D3

DTC Code DTC Name
B1593 No Response from Stereo Component Amplifier
B15D3 Stereo Component Amplifier Disconnected

DESCRIPTION

The display and navigation module display and stereo component amplifier assembly are connected by the MOST communication line.

When a MOST communication error occurs between the display and navigation module display and stereo component amplifier assembly, these DTCs will be stored.

DTC No. DTC Detection Condition Trouble Area
B1593 No response to the diagnostic memory request from the master unit.

  • Stereo component amplifier assembly power source circuit

  • MOST circuit between radio receiver assembly and stereo component amplifier assembly

  • MOST circuit between display and navigation module display and stereo component amplifier assembly

  • Display and navigation module display

  • Stereo component amplifier assembly
B15D3*1 A device that is listed in the MOST network connected device record of the master unit is missing.

Tech Tips


  • *1: Even if no fault is present, this DTC may be stored depending on the battery condition or hybrid system start voltage.

  • The display and navigation module display is the master unit.

WIRING DIAGRAM

A01NHDSE01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)


    1. Check for optional components.


      1. Check that optional components (including associated wiring) which generate radio waves are not installed.

        Result
        Result Proceed to
        Optional components (including associated wiring) are installed. A
        Optional components (including associated wiring) are not installed. B

        Tech Tips


        • Electrical noise from radio waves generated by optional components or the wiring for those components may affect MOST communication.

        • This DTC may be stored when an MOST communication error occurs due to electrical noise.


    B

    CHECK DTC Click here

    A

  2. REMOVE OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)


    1. Remove optional components (including associated wiring).

      Note

      Do not remove optional components or associated wiring without the permission of the customer.


    NEXT

  3. CHECK DTC


    1. Clear the DTCs Click here.

    2. Recheck for DTCs and check if the same DTC is output again.

      OK
      No DTCs are output.

    NG

    CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY POWER SOURCE) Click here

    OK

    END

  4. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY POWER SOURCE)


    1. A01NHH3E02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Stereo Component Amplifier Assembly)

      Disconnect the stereo component amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O18-2 (GND) - Body ground Always Below 1 Ω
      O18-6 (GND2) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      O18-1 (+B) - O18-2 (GND) Power switch off 11 to 14 V
      O18-3 (+B2) - O18-2 (GND) Power switch off 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (MOST COMMUNICATION LINE)


    1. A01NHO9E08

      Disconnect the display and navigation module display connector.

    2. A01NDFXE09

      Disconnect the stereo component amplifier assembly connector.

    3. A01NCWRE20

      Disconnect the radio receiver assembly connector.

    4. Measure the resistance between the display and navigation module display and stereo component amplifier assembly according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      G6-1 (MI+) - O15-6 (MO+) Always Below 1 Ω
      G6-5 (MI-) - O15-12 (MO-) Always Below 1 Ω
      G6-2 (SLDI) - O15-11 (SLDO) Always Below 1 Ω
      G6-1 (MI+) - Body ground Always 10 kΩ or higher
      G6-5 (MI-) - Body ground Always 10 kΩ or higher
      G6-2 (SLDI) - Body ground Always 10 kΩ or higher

    5. Measure the resistance between the radio receiver assembly and stereo component amplifier assembly according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      G12-11 (MO+) - O15-4 (MI+) Always Below 1 Ω
      G12-25 (MO-) - O15-10 (MI-) Always Below 1 Ω
      G12-24 (SLDI) - O15-5 (SLDI) Always Below 1 Ω
      G12-11 (MO+) - Body ground Always 10 kΩ or higher
      G12-25 (MO-) - Body ground Always 10 kΩ or higher
      G12-24 (SLDI) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Display and Navigation Module Display)
      *2

      Front view of wire harness connector

      (to Stereo Component Amplifier Assembly)
      *3

      Front view of wire harness connector

      (to Radio Receiver Assembly)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. 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 if the same DTC is output again.

      OK
      No DTCs are output.

    NG

    REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Click here

    OK

    END