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AUDIO AND VISUAL SYSTEM(w/o Parallel Parking Assist Function), Diagnostic DTC:B15D3

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DTC Code DTC Name
B15D3 Stereo Component Amplifier Disconnected
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DESCRIPTION

The radio 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 receiver assembly and stereo component amplifier assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area
B15D3 Stereo Component Amplifier Disconnected

When either condition below is met:


  • The stereo component amplifier assembly is/was not connected while the engine switch is/was 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 receiver assembly and stereo component amplifier assembly

  • Stereo component amplifier assembly

  • Radio receiver assembly

  • Harness or connector
Tip:

The radio receiver assembly is the master unit.

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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

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

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PROCEDURE


  1. Click here

    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

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    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
      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.


  3. 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.

      Result
      Proceed to
      NEXT

  4. Click here

    CHECK DTC


    1. Clear the DTCs.

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      1. Body Electrical > Navigation System > Clear DTCs


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


      1. Body Electrical > Navigation System > Trouble Codes


      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

  5. Click here

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


    1. Disconnect the T20 and T21 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
      T20-3 (GND) - Body ground Always Below 1 Ω
      T20-18 (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
      T20-1 (+B) - T20-3 (GND) Always 11 to 14 V
      T20-16 (+B2) - T20-3 (GND) Always 11 to 14 V
      T21-12 (ACC) - T20-3 (GND) Engine switch on (ACC) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. Click here

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


    1. Disconnect the O70 radio receiver assembly connector.

    2. Disconnect the T21 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
      O70-7 (TX1+) - T21-8 (TX+) Always Below 1 Ω
      O70-8 (TX1-) - T21-7 (TX-) Always Below 1 Ω
      O70-7 (TX1+) - Body ground Always 10 kΩ or higher
      O70-8 (TX1-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

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    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY


    1. Replace the stereo component amplifier assembly.

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    2. Clear the DTCs.

      Click here


      1. Body Electrical > Navigation System > Clear DTCs


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


      1. Body Electrical > Navigation System > Trouble Codes


      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    • OK

      END

    • NG

      REPLACE RADIO RECEIVER ASSEMBLYClick here