NAVIGATION SYSTEM(for HDD), Diagnostic DTC:B1593 and 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 are stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B1593

No Response from Stereo Component Amplifier

No response to the diagnostic memory request from the master unit.

  • Harness or connector

  • Stereo component amplifier assembly

  • Display and navigation module display

  • Radio receiver assembly

B15D3

Stereo Component Amplifier Disconnected

A device that is listed in the MOST network connected device record of the master unit is missing.

  • Harness or connector

  • Stereo component amplifier assembly

  • Display and navigation module display

  • Radio receiver assembly
Tip:

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

WIRING DIAGRAM

E205523E10

CAUTION / NOTICE / HINT

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
        Tip:

        • 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 DTCClick 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.

      Result

      Result

      NEXT
    NEXT

  3. CHECK FOR DTC

    1. Clear the DTCs.

      Click here

      Body Electrical > Navigation System > Clear DTCs

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

      Body Electrical > Navigation System > Trouble Codes

      OK

      No DTCs are output.

      Result

      Result

      OK

      NG
    OK

    END (OPTIONAL COMPONENTS IS DEFECTIVE)

    NG

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

    1. E192419C01

      *a

      Front view of wire harness connector

      (to Stereo Component Amplifier Assembly)

      Disconnect the R32 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

      R32-2 (GND) - Body ground

      Always

      Below 1 Ω

      R32-6 (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

      R32-1 (+B) - R32-2 (GND)

      Always

      11 to 14 V

      R32-3 (+B2) - R32-2 (GND)

      Always

      11 to 14 V

      Result

      Result

      OK

      NG
    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 R34 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+) - R34-4 (MI+)

      Always

      Below 1 Ω

      H2-7 (MO-) - R34-10 (MI-)

      Always

      Below 1 Ω

      H2-6 (SLDO) - R34-5 (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

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    1. Disconnect the R34 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

      R34-6 (MO+) - H1-9 (MI+)

      Always

      Below 1 Ω

      R34-12 (MO-) - H1-23 (MI-)

      Always

      Below 1 Ω

      R34-11 (SLDO) - H1-10 (SLDI)

      Always

      Below 1 Ω

      R34-6 (MO+) - Body ground

      Always

      10 kΩ or higher

      R34-12 (MO-) - Body ground

      Always

      10 kΩ or higher

      R34-11 (SLDO) - Body ground

      Always

      10 kΩ or higher

      Result

      Result

      OK

      NG
    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

      Body Electrical > Navigation System > Clear DTCs

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

      Body Electrical > Navigation System > Trouble Codes

      OK

      No DTCs are output.

      Result

      Result

      OK

      NG
    OK

    END (STEREO COMPONENT AMPLIFIER IS DEFECTIVE)

    NG

    REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY

    Click here