AUDIO AND VISUAL SYSTEM(for Radio and Display Type), Diagnostic DTC:B157D

DTC Code DTC Name
B157D DAB Tuner Antenna Disconnected

DESCRIPTION

This DTC is stored when a malfunction occurs in the digital audio broadcasting antenna assembly which is connected to the radio and display receiver assembly.

DTC Code DTC Detection Condition Trouble Area
B157D The digital audio broadcasting antenna assembly is not connected

  • Digital audio broadcasting antenna assembly

  • No. 2 antenna cord sub-assembly

  • Windshield glass (window glass antenna wire)

  • Harness or connector

  • Radio and display receiver assembly

WIRING DIAGRAM

B001GBNE01
*a Windshield Glass (Window Glass Antenna Wire)
*b Digital Audio Broadcasting Antenna Assembly
*c No. 2 Antenna Cord Sub-assembly
*d Radio and Display Receiver Assembly

CAUTION / NOTICE / HINT

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 not output.

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  2. CHECK OPTIONAL COMPONENTS


    1. Check if any optional components that may decrease reception capacity, such as sunshade film or a telephone antenna, are installed.

      OK
      Optional components are installed.

      Note

      Do not remove optional components without permission of the customer.


    OK

    REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)

    NG

  3. INSPECT WINDSHIELD GLASS (WINDOW GLASS ANTENNA WIRE)


    1. Inspect the windshield glass (window glass antenna wire) Click here.


    NG

    REPAIR WINDSHIELD GLASS Click here

    OK

  4. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. Remove the antenna connector from the radio and display assembly.

    2. Turn the ignition switch to ACC with the radio and display assembly connector connected.

    3. Turn on the radio and turn into AM mode.

    4. Place a screwdriver, thin wire or other metal object on the radio and display receiver assembly antenna jack and check that noise can be heard from the speakers.

      OK
      Noise occurs.
      Result:
      Result Proceed to
      OK (w/o Telematics Transceiver) A
      OK (w/ Telematics Transceiver) B
      NG C

    B

    CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NO. 2 ANTENNA CORD SUB-ASSEMBLY) Click here

    C

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    A

  5. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NO. 2 ANTENNA CORD SUB-ASSEMBLY)


    1. B001IGPC02
      *a

      Front view of wire harness connector

      (to Navigation Receiver Assembly)
      *b

      Front view of wire harness connector

      (to No. 2 Antenna Cord Sub-assembly)

      Disconnect the DB radio and display receiver assembly connector.

    2. Disconnect the antenna connector from the No.2 antenna cord sub-assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      DB-1 - 1 Always Below 1 Ω
      DB-1-a - 1-a Always Below 1 Ω
      DB-1 - Body ground Always 10 kΩ or higher
      DB-1-a - Body ground Always 10 kΩ or higher

    OK

    CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NO. 2 ANTENNA CORD SUB-ASSEMBLY)


    1. B001D91C01
      *a

      Front view of wire harness connector

      (to Navigation Receiver Assembly)
      *b

      Front view of wire harness connector

      (to No. 2 Antenna Cord Sub-assembly)

      Disconnect the DB radio and display receiver assembly connector.

    2. Disconnect the antenna connector from the No.2 antenna cord sub-assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      DB-1 - 1 Always Below 1 Ω
      DB-1-a - 1-a Always Below 1 Ω
      DB-1 - Body ground Always 10 kΩ or higher
      DB-1-a - Body ground Always 10 kΩ or higher

    OK

    CHECK DIGITAL AUDIO BROADCASTING ANTENNA ASSEMBLY Click here

    NG

    REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY Click here

  7. CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY


    1. B001HYAE04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Radio and Display Receiver Assembly)
      *b

      Front view of wire harness connector

      (to Digital Audio Broadcasting Antenna Assembly)

      Disconnect the antenna connector from the radio and display assembly.

    2. Disconnect the antenna connector from the digital audio broadcasting antenna assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 1 Always Below 1 Ω
      1-a - 1-a Always Below 1 Ω
      1 - Body ground Always 10 kΩ or higher
      1-a - Body ground Always 10 kΩ or higher

    NG

    REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY Click here

    OK

  8. CHECK DIGITAL AUDIO BROADCASTING ANTENNA ASSEMBLY


    1. Replace the digital audio broadcasting antenna assembly with a known good one Click here.

    2. Clear the DTCs Click here.

    3. Check for DTCs Click here.

      OK
      No DTCs are not output.

    OK

    END (DIGITAL AUDIO BROADCASTING ANTENNA ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here