NAVIGATION SYSTEM, 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 MOST communication lines.

When a MOST communication error occurs between the radio receiver assembly and stereo component amplifier assembly, this DTC will be stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
B15D3 Stereo Component Amplifier Disconnected A device that is listed in the MOST network connected device record of the master unit is missing

  • Stereo component amplifier assembly power source circuit

  • MOST circuit between radio receiver assembly and stereo component amplifier assembly

  • Stereo component amplifier assembly

  • Radio receiver assembly

  • Harness or connector

  • Stop and start system*

Tech Tips

For the MOST network, the radio receiver assembly is the master unit.

WIRING DIAGRAM

A01W20XE12

CAUTION / NOTICE / HINT

Note


  • Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System.

    Click here

  • 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 MOST communication.

      • This DTC may be stored when a MOST 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

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

      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 H99 stereo component amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H99-3 (GND) - Body ground Always Below 1 Ω
      H99-18 (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
      H99-1 (+B) - H99-3 (GND) Always

      11 to 14 V*1

      9.5 to 14 V*2
      H99-16 (+B2) - H99-3 (GND) Always

      11 to 14 V*1

      9.5 to 14 V*2

      *1: w/o Stop and Start System

      *2: w/ Stop and Start System

      Result
      Result Proceed to
      OK A
      NG (w/o Stop and Start System) B
      NG (w/ Stop and Start System) C

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    C

    GO TO STOP AND START SYSTEM Click here

    A

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


    1. Disconnect the H156 radio receiver assembly connector.

    2. Disconnect the H157 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
      H156-5 (MO+) - H157-2 (MI+) Always Below 1 Ω
      H156-6 (MO-) - H157-3 (MI-) Always Below 1 Ω
      H156-7 (SLDO) - H157-4 (SLDI) Always Below 1 Ω
      H156-2 (MI+) - H157-5 (MO+) Always Below 1 Ω
      H156-3 (MI-) - H157-6 (MO-) Always Below 1 Ω
      H156-4 (SLDI) - H157-7 (SLDO) Always Below 1 Ω
      H156-5 (MO+) or H157-2 (MI+) - Body ground Always 10 kΩ or higher
      H156-6 (MO-) or H157-3 (MI-) - Body ground Always 10 kΩ or higher
      H156-7 (SLDO) or H157-4 (SLDI) - Body ground Always 10 kΩ or higher
      H156-2 (MI+) or H157-5 (MO+) - Body ground Always 10 kΩ or higher
      H156-3 (MI-) or H157-6 (MO-) - Body ground Always 10 kΩ or higher
      H156-4 (SLDI) or H157-7 (SLDO) - 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

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

      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here