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 the 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 the stereo component amplifier assembly, these DTCs is stored.

DTC Code 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 stereo component amplifier assembly and display and navigation module display

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

  • Stereo component amplifier assembly

  • Display and navigation module display

  • Radio receiver assembly
B15D3 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

A0099ZWE01

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 MOST communication.

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


    B

    CHECK FOR DTC Click here

    A

  2. REMOVE OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)


    1. Remove the optional components (including associated wiring).

      Note

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


    NEXT

  3. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs and check if the same trouble occurs again.

      OK
      No DTCs are output.

    NG

    CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - BATTERY AND BODY GROUND) Click here

    OK

    END

  4. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - BATTERY AND BODY GROUND)


    1. A0099EGE03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Stereo Component Amplifier Assembly)

      Disconnect the H6 stereo component amplifier assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H6-2 (GND) - Body ground Always Below 1 Ω
      H6-6 (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
      H6-1 (+B) - H6-2 (GND) Always 11 to 14 V
      H6-3 (+B2) - H6-2 (GND) Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - STEREO COMPONENT AMPLIFIER)


    1. Disconnect the H2 display and navigation module display connector.

    2. Disconnect the H11 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
      H2-3 (MO+) - H11-4 (MI+) Always Below 1 Ω
      H2-7 (MO-) - H11-10 (MI-) Always Below 1 Ω
      H2-6 (SLDO) - H11-5 (SLDI) Always Below 1 Ω
      H2-3 (MO+) - Body ground Always 10 kΩ or higher
      H2-7 (MO-) - Body ground Always 10 kΩ or higher
      H2-6 (SLDO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - RADIO RECEIVER)


    1. Disconnect the H11 stereo component amplifier assembly connector.

    2. Disconnect the H1 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H11-6 (MO+) - H1-9 (MI+) Always Below 1 Ω
      H11-12 (MO-) - H1-23 (MI-) Always Below 1 Ω
      H11-11 (SLDO) - H1-10 (SLDI) Always Below 1 Ω
      H11-6 (MO+) - Body ground Always 10 kΩ or higher
      H11-12 (MO-) - Body ground Always 10 kΩ or higher
      H11-11 (SLDO) - 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. Check for DTCs and check if the same trouble occurs again.

      OK
      No DTCs are output.

    NG

    REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Click here

    OK

    END