NAVIGATION SYSTEM (for Navigation Receiver Type), Diagnostic DTC:B15D3

DTC Code DTC Name
B15D3 Stereo Component Amplifier Disconnected

DESCRIPTION

The navigation ECU sub-assembly and stereo component amplifier assembly are connected by the AVC-LAN communication line.

When an AVC-LAN communication error occurs between the navigation ECU sub-assembly and stereo component amplifier assembly, this DTC will be stored.

DTC No. DTC Detection Condition Trouble Area
B15D3

When either condition below is met:

  • Stereo component amplifier assembly is/was not connected while the ignition switch is 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 navigation ECU sub-assembly and stereo component amplifier assembly

  • Stereo component amplifier assembly

  • Navigation ECU sub-assembly

  • Harness or connector

Tech Tips

  • Even if no fault is present, this DTC may be stored depending on the battery condition or engine start voltage.

  • The navigation ECU sub-assembly is the master unit.

WIRING DIAGRAM

A011SJZE15

INSPECTION PROCEDURE

Note

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

  • After replacing the navigation ECU sub-assembly of vehicles subscribed to pay-type satellite radio broadcasts, registration of the XM radio ID is necessary.

PROCEDURE

  1. CHECK DTC

    1. If DTC B15C3 is output, perform the troubleshooting of DTC B15C3 first.

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

    GO TO DTC "B15C3" IN DIAGNOSTIC TROUBLE CODE CHART 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 if the same DTC is output again.

      OK
      No DTCs are output.
    NG

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

    OK

    END

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

    1. Disconnect the 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
      I68-3 (GND) - 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
      I68-1 (+B) - I68-3 (GND) Always 11 to 14 V
      I69-12 (ACC) - I68-3 (GND) Ignition switch ACC 11 to 14 V
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY)

    1. Disconnect the navigation ECU sub-assembly connector.

    2. Disconnect the 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
      I67-7 (TX1+) - I69-8 (TX+) Always Below 1 Ω
      I67-8 (TX1-) - I69-7 (TX-) Always Below 1 Ω
      I67-7 (TX1+) - Body ground Always 10 kΩ or higher
      I67-8 (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 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 NAVIGATION ECU SUB-ASSEMBLY Click here

    OK

    END