NAVIGATION SYSTEM, Diagnostic DTC:B15D3

DTC Code DTC Name
B15D3 Stereo Component Amplifier Disconnected

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 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 ignition switch is/was ON or 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

Tech Tips

The radio and display receiver assembly is the master unit.

DTC Detection Conditions:
Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition The ignition switch is/was ON or ACC ○ -
The engine is started - ○
Malfunction Status The stereo component amplifier assembly is/was not connected ○ -
Communication between the master unit and the stereo component amplifier assembly is not possible - ○
Detection Time - -
Number of Trips 1 trip 1 trip

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

WIRING DIAGRAM

A001SM2E11

CAUTION / NOTICE / HINT

Note

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

    GO TO STEP 4 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.

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Navigation System > Clear DTCs

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


      Body Electrical > Navigation System > Trouble Codes
      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

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


    1. Disconnect the stereo component amplifier assembly connectors.

    2. A001UP5C03
      *a

      Front view of wire harness connector

      (to Stereo Component Amplifier Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F75-3 (GND) - Body ground Always Below 1 Ω
      F75-18 (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
      F75-1 (+B) - F75-3 (GND) Always 11 to 14 V
      F75-16 (+B2) - F75-3 (GND) Always 11 to 14 V
      F76-12 (ACC) - F75-3 (GND) Ignition switch ACC 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the F125 radio and display receiver assembly connector.

    2. Disconnect the F76 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
      F125-7 (TX1+) - F76-8 (TX+) Always Below 1 Ω
      F125-8 (TX1-) - F76-7 (TX-) Always Below 1 Ω
      F125-7 (TX1+) - Body ground Always 10 kΩ or higher
      F125-8 (TX1-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    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


      Body Electrical > Navigation System > Clear DTCs

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


      Body Electrical > Navigation System > Trouble Codes
      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here