NAVIGATION SYSTEM (for HDD), 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 stereo component amplifier assembly and display and navigation module display

  • Stereo component amplifier assembly

  • Display and navigation module display
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

A01620CE05

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 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. Disconnect the P27 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
      P27-2 (GND) - Body ground Always Below 1 Ω
      P27-6 (GND2) - Body ground Always Below 1 Ω

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

      Standard Voltage (w/ Front Center Speaker)
      Tester Connection Condition Specified Condition
      P27-1 (+B) - P27-2 (GND) Engine switch off 11 to 14 V
      P27-3 (+B2) - P27-2 (GND) Engine switch off 11 to 14 V
      Standard Voltage (w/o Front Center Speaker)
      Tester Connection Condition Specified Condition
      P27-3 (+B2) - P27-2 (GND) Engine switch off 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR


    1. Disconnect the P43 stereo component amplifier assembly connector.

    2. Disconnect the J106 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P43-4 (MI+) - J106-11 (MO+) Always Below 1 Ω
      P43-10 (MI-) - J106-25 (MO-) Always Below 1 Ω
      P43-5 (SLDI) - J106-24 (SLDI) Always Below 1 Ω
      P43-4 (MI+) - Body ground Always 10 kΩ or higher
      P43-10 (MI-) - Body ground Always 10 kΩ or higher
      P43-5 (SLDI) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR


    1. Disconnect the P43 stereo component amplifier assembly connector.

    2. Disconnect the J123 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
      P43-6 (MO+) - J123-1 (MI+) Always Below 1 Ω
      P43-12 (MO-) - J123-5 (MI-) Always Below 1 Ω
      P43-11 (SLDO) - J123-2 (SLDI) Always Below 1 Ω
      P43-6 (MO+) - Body ground Always 10 kΩ or higher
      P43-12 (MO-) - Body ground Always 10 kΩ or higher
      P43-11 (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. 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