AUDIO AND VISUAL SYSTEM (for Radio and Display Type), Diagnostic DTC:B15D8

DTC Code DTC Name
B15D8 Monitor Disconnected

DESCRIPTION

The parking assist ECU and radio and display receiver assembly are connected by an AVC-LAN communication line. When an AVC-LAN communication error occurs between the radio and display receiver assembly and parking assist ECU, these DTCs will be stored.

DTC Code DTC Detection Condition Trouble Area
B15D8 A device that is listed in the AVC-LAN connected device record of the master unit is missing.

  • Parking assist ECU power source circuit

  • AVC-LAN circuit

  • Parking assist ECU

  • Radio and display receiver assembly

Tech Tips


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

  • The radio and display receiver assembly is the master unit.

WIRING DIAGRAM

A01DT8BE17

INSPECTION PROCEDURE

Note

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

Tech Tips

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

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      No DTCs are output.

    NG

    CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - BATTERY AND BODY GROUND) Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  2. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - BATTERY AND BODY GROUND)


    1. A01DMM3E32
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Parking Assist ECU)

      Disconnect the parking assist ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I6-4 (GND1) - 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
      I6-1 (+B) - I6-4 (GND1) Always 11 to 14 V
      I6-8 (IG) - I6-4 (GND1) Ignition switch ON 11 to 14 V
      I6-9 (ACC) - I6-4 (GND1) Ignition switch ACC 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. A01DQGPE03

      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
      7 (TX3+) - 8 (TX3-) Always 60 to 80 Ω

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - PARKING ASSIST ECU)


    1. Disconnect the H50 radio and display receiver assembly connector.

    2. Disconnect the I6 parking assist ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H50-7 (TX3+) - I6-11 (TX+) Always Below 1 Ω
      H50-8 (TX3-) - I6-10 (TX-) Always Below 1 Ω
      H50-7 (TX3+) - Body ground Always 10 kΩ or higher
      H50-8 (TX3-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK PARKING ASSIST ECU


    1. Replace the parking assist ECU with a known good one.


    2. Clear the DTCs Click here.

    3. Check for DTCs Click here.

      OK
      No DTCs are output.

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

    END (PARKING ASSIST ECU IS DEFECTIVE)