AUDIO AND VISUAL SYSTEM(for Radio and Display Type), Diagnostic DTC:B15D3

DTC Code DTC Name
B15D3 Stereo Component Amplifier Disconnected

DESCRIPTION

The radio receiver assembly and stereo component amplifier assembly are connected via AVC-LAN communication line.

This DTC is stored when an AVC-LAN communication error occurs between the radio receiver assembly and stereo component amplifier assembly.

DTC No. DTC Detection Condition Trouble Area
B15D3

When either condition below is met:


  • The stereo component amplifier assembly is/was not connected while the power switch is/was on (IG) or on (ACC).

  • Communication between the master unit and the stereo component amplifier assembly is not possible when the power switch is/was on (READY).

  • Stereo component amplifier assembly power source circuit

  • AVC-LAN circuit between radio receiver assembly and stereo component amplifier assembly

  • Stereo component amplifier assembly

  • Radio receiver assembly

  • Harness or connector

Tech Tips

The radio receiver assembly is the master unit.

WIRING DIAGRAM

B001MVLE02

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK DTC


    1. If DTC B15C3 is output, perform troubleshooting for DTC B15C3 first.

      Result
      Result Proceed to
      DTC B15C3 is not output A
      DTC B15C3 is output B

    B

    GO TO DTC B15C3 Click here

    A

  2. CHECK OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)


    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

  3. 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

  4. CHECK DTC


    1. Clear the DTCs Click here.

    2. Recheck for DTCs and check that no DTCs are output.

      OK
      No DTCs are output.

    OK

    END

    NG

  5. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY POWER SOURCE)


    1. Disconnect the H157 and H168 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
      H157-3 (GND) - Body ground Always Below 1 Ω
      H157-18 (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
      H157-1 (+B) - H157-3 (GND) Power switch off 11 to 14 V
      H157-16 (+B2) - H157-3 (GND) Power switch off 11 to 14 V
      H168-12 (ACC) - H157-3 (GND) Power switch on (ACC) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the H164 radio receiver assembly connector.

    2. Disconnect the H168 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
      H164-7 (TX1+) - H168-8 (TX+) Always Below 1 Ω
      H164-8 (TX1-) - H168-7 (TX-) Always Below 1 Ω
      H164-7 (TX1+) - Body ground Always 10 kΩ or higher
      H164-8 (TX1-) - 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 with a new or known good one Click here.

    2. Clear the DTCs Click here.

    3. Recheck for DTCs and check that no DTCs are output.

      OK
      No DTCs are output.

    OK

    END

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here