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

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DTC Code DTC Name
B15D3 Stereo Component Amplifier Disconnected
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DESCRIPTION

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

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

DTC Code DTC Detection Condition Trouble Area
B15D3

When either condition below is met:


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

  • Communication between the master unit and the stereo component amplifier assembly is not possible when the engine is started

  • Stereo component amplifier assembly power source circuit

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

  • Stereo component amplifier assembly

  • Radio and display receiver assembly

  • Harness or connector
Tip:

For the AVC-LAN communication line, the radio and display receiver assembly is the master unit.

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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

  • If DTC B15C3 is output, perform troubleshooting for DTC B15C3 first (Click here).

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

Tip:

When replacing the radio and display receiver assembly, it is necessary to perform the vehicle contract setting for Connected Services (w/ Connected Services Function).

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PROCEDURE


  1. Click here

    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.

        Table 1. 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 AVC-LAN communication.

        • This DTC may be stored when an AVC-LAN communication error occurs due to electrical noise.


  2. Click here

    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.


  3. Click here

    CHECK FOR DTC


    1. Clear the DTCs (Click here).

    2. Check for DTCs (Click here).

      OK
      No DTCs are output.

    • OK

      END (COMMUNICATION MALFUNCTION DUE TO NOISE)

    • NGClick here
  4. Click here

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


    1. B001ZXKE02

      Disconnect the stereo F18 and F74 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
      F74-3 (GND) - Body ground Always Below 1 Ω
      F74-18 (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
      F74-1 (+B) - F74-3 (GND) Always 11 to 14 V
      F74-16 (+B2) - F74-3 (GND) Always 11 to 14 V
      F18-12 (ACC) - F74-3 (GND) Engine switch on (ACC) 11 to 14 V
      Table 2. Text in Illustration
      *a

      Front view of wire harness connector

      (to Stereo Component Amplifier Assembly)

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. Click here

    INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. B001XM8E22

      Remove the radio and display receiver assembly (Click here).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      8 (TX1-) - 7 (TX1+) Always 60 to 80 Ω

  6. Click here

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


    1. Disconnect the F124 radio and display receiver assembly connector.

    2. Disconnect the F18 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
      F124-7 (TX1+) - F18-8 (TX+) Always Below 1 Ω
      F124-8 (TX1-) - F18-7 (TX-) Always Below 1 Ω
      F124-7 (TX1+) - Body ground Always 10 kΩ or higher
      F124-8 (TX1-) - Body ground Always 10 kΩ or higher

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. Click here

    CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY


    1. Replace the stereo component amplifier assembly with a known good one (Click here).

    2. Clear the DTCs (Click here).

    3. Check for DTCs (Click here).

      OK
      No DTCs are output.

    • OK

      END (STEREO COMPONENT AMPLIFIER ASSEMBLY IS DEFECTIVE)

    • NG

      REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY (Click here)