NAVIGATION SYSTEM (for HDD), Diagnostic DTC:B1595, B15D5

DTC Code DTC Name
B1595 No Response from Rear Seat Entertainment System
B15D5 Rear Seat Entertainment System Disconnected

DESCRIPTION

The display and navigation module display and the multi-display controller sub-assembly are connected by the MOST communication line.

When a MOST communication error occurs between the display and navigation module display and the multi-display controller sub-assembly, these DTCs will be stored.

DTC No. DTC Detection Condition Trouble Area
B1595 No response to the diagnostic memory request from the master unit.

  • Multi-display controller sub-assembly power source circuit

  • MOST circuit between stereo component amplifier assembly and multi-display controller sub-assembly

  • MOST circuit between multi-display controller sub-assembly and display and navigation module display

  • Multi-display controller sub-assembly

  • Display and navigation module display
B15D5 A device that is listed in the MOST network connected device record of the master unit is missing.

Tech Tips

For the MOST network, the display and navigation module display is the master unit.

WIRING DIAGRAM

A01NDB0E01

INSPECTION PROCEDURE

Note


  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

  • When replacing the display and navigation module display, perform vehicle contract setting (w/ G-BOOK system) Click here.

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 a 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 (MULTI-DISPLAY CONTROLLER SUB-ASSEMBLY POWER SOURCE) Click here

    OK

    END

  4. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY CONTROLLER SUB-ASSEMBLY POWER SOURCE)


    1. A01NDF4E02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Multi-display Controller Sub-assembly)

      Disconnect the G16 multi-display controller sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G16-21 (GND) - Body ground Always Below 1 Ω
      G16-22 (GND5) - 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
      G16-14 (+B) - G16-21 (GND) Power switch off 11 to 14 V
      G16-28 (+B1) - G16-21 (GND) Power switch off 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR


    1. A01NDF4E03

      Disconnect the G16 multi-display controller sub-assembly connector.

    2. A01NHK0E04

      Disconnect the O15 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
      G16-1 (MI+) - O15-6 (MO+) Always Below 1 Ω
      G16-2 (MI-) - O15-12 (MO-) Always Below 1 Ω
      G16-3 (SLDI) - O15-11 (SLDO) Always Below 1 Ω
      G16-1 (MI+) - Body ground Always 10 kΩ or higher
      G16-2 (MI-) - Body ground Always 10 kΩ or higher
      G16-3 (SLDI) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Multi-display Controller Sub-assembly)
      *2

      Front view of wire harness connector

      (to Stereo Component Amplifier Assembly)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR


    1. A01NDF4E04

      Disconnect the G16 multi-display controller sub-assembly connector.

    2. A01NHO9E02

      Disconnect the G6 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
      G16-6 (MO+) - G6-1 (MI+) Always Below 1 Ω
      G16-5 (MO-) - G6-5 (MI-) Always Below 1 Ω
      G16-4 (SLDO) - G6-2 (SLDI) Always Below 1 Ω
      G16-6 (MO+) - Body ground Always 10 kΩ or higher
      G16-5 (MO-) - Body ground Always 10 kΩ or higher
      G16-4 (SLDO) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Multi-display Controller Sub-assembly)
      *2

      Front view of wire harness connector

      (to Display and Navigation Module Display)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. REPLACE MULTI-DISPLAY CONTROLLER SUB-ASSEMBLY


    1. Replace the multi-display controller sub-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