NAVIGATION SYSTEM (for HDD), Diagnostic DTC:B1597, B15D6

DTC Code DTC Name
B1597 No Response from Display
B15D6 Display Disconnected

DESCRIPTION

The multi-display and display module board are connected by an AVC-LAN communication line.

The display module board and navigation computer sub-assembly are connected by an AVC-LAN communication line.

When an AVC-LAN communication error occurs between the display module board and multi-display, these DTCs will be stored.

Tech Tips

If either B1597 or B15D6 and either B1560 or B156F are output, troubleshoot for B1560 or B156F first.

DTC No. DTC Detection Condition Trouble Area
B1597 No response to the diagnostic memory request from the master unit.

  • Multi-display power source circuit

  • AVC-LAN circuit between the display module board and multi-media module wire

  • Multi-media module wire

  • Multi-display

  • Display module board

  • Navigation computer sub-assembly
B15D6*1 A device that is listed in the AVC-LAN 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 auxiliary battery condition or hybrid system start voltage.

  • The navigation computer sub-assembly is the master unit.

WIRING DIAGRAM

A003WXXE03

INSPECTION PROCEDURE

Note

Inspect the fuses for circuits related to this system before performing the following 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 AVC-LAN communication.

        • This DTC may be stored when an AVC-LAN 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 DTCs are output again.

      Result
      Result Proceed to
      B1597 or B15D6 is output. A
      Either B1597 or B15D6 and either B1560 or B156F are output. B
      No DTCs are output. C

    B

    GO TO DTC CHART Click here

    C

    END

    A

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


    1. Disconnect the H20 multi-media module wire connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H20-6 (GND1) - 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
      H20-5 (+B) - H20-6 (GND1) Power switch off 11 to 14 V
      H20-10 (ACC) - H20-6 (GND1) Power switch on (ACC) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT DISPLAY MODULE BOARD


    1. A003XVIE03
      Text in Illustration
      *a

      Component without harness connected

      (Display Module Board)

      Disconnect the H21 display module board connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H21-9 (TX4+) - H21-11 (TX5+) Always Below 1 Ω
      H21-10 (TX4-) - H21-12 (TX5-) Always Below 1 Ω

    NG

    REPLACE DISPLAY MODULE BOARD Click here

    OK

  6. CHECK HARNESS AND CONNECTOR


    1. Disconnect the H20 multi-media module wire connectors.

    2. Disconnect the H21 display module board connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H20-3 (MTX+) - H21-11 (TX5+) Always Below 1 Ω
      H20-8 (MTX-) - H21-12 (TX5-) Always Below 1 Ω
      H20-3 (MTX+) - Body ground Always 10 kΩ or higher
      H20-8 (MTX-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT MULTI-MEDIA MODULE WIRE


    1. A003XI8E07

      Disconnect the H20 multi-media module wire connector.

    2. A003VTLE07

      Disconnect the DC1 multi-media module wire connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H20-5 (+B) - DC1-12 (+B) Always Below 1 Ω
      H20-10 (ACC) - DC1-24 (ACC) Always Below 1 Ω
      H20-6 (GND1) - DC1-13 (GND1) Always Below 1 Ω
      H20-3 (MTX+) - DC1-7 (MTX+) Always Below 1 Ω
      H20-8 (MTX-) - DC1-19 (MTX-) Always Below 1 Ω
      Text in Illustration
      *a

      Component without harness connected

      (Multi-media Module Wire)

    NG

    REPLACE MULTI-MEDIA MODULE WIRE Click here

    OK

  8. REPLACE MULTI-DISPLAY


    1. Replace the multi-display Click here.

    2. Clear the DTCs Click here.

    3. Recheck for DTCs and check if the same DTCs are output again.

      OK
      No DTCs are output.

    NG

    REPLACE DISPLAY MODULE BOARD Click here

    OK

    END

  9. REPLACE DISPLAY MODULE BOARD


    1. Replace the display module board Click here.

    2. Clear the DTCs Click here.

    3. Recheck for DTCs and check if the same DTCs are output again.

      OK
      No DTCs are output.

    NG

    REPLACE NAVIGATION COMPUTER SUB-ASSEMBLY Click here

    OK

    END