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 cable which is connected to the radio and display receiver assembly.

DTC Code DTC Detection Condition Trouble Area
B157D The digital audio broadcasting cable is not connected.

  • Antenna cord sub-assembly

  • No. 1 amplifier antenna assembly

  • Digital audio broadcasting antenna assembly

  • Roof antenna pole sub-assembly (for Wagon)

  • Back window glass (window glass antenna wire) (for Sedan)

  • Radio and display receiver assembly

WIRING DIAGRAM

A004N4IE30

CAUTION / NOTICE / HINT

Tech Tips

Check that the wire harness is properly installed and does not have any sharp bends, pinching or loose connections Click here.

PROCEDURE


  1. CHECK CONNECTION OF DAB RADIO ANTENNA CABLE


    1. Check if the DAB radio antenna cable is securely connected to the radio and display receiver assembly.

      OK
      DAB radio antenna cable is securely connected

    NG

    SECURELY CONNECT DAB RADIO ANTENNA CABLE

    OK

  2. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY


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

    2. Turn the ignition switch to ACC with the radio and display receiver 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.

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

  3. CHECK VEHICLE TYPE


    1. Check the vehicle type.

      Result
      Result Proceed to
      for Sedan A
      for wagon B

    B

    CHECK ROOF ANTENNA POLE SUB-ASSEMBLY Click here

    A

  4. CHECK BACK WINDOW GLASS (WINDOW GLASS ANTENNA WIRE)


    1. Check the back window glass (window glass antenna wire) Click here.


    NG

    REPAIR BACK WINDOW GLASS Click here

    OK

  5. CHECK ANTENNA CORD SUB-ASSEMBLY


    1. A004TN7E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Radio and Display Receiver Assembly)
      *b

      Front view of wire harness connector

      (to No. 1 Amplifier Antenna Assembly)

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

    2. Remove the antenna connector from the No. 1 amplifier antenna assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (DAB) - 2 Always Below 1 Ω
      1a - 2a Always Below 1 Ω
      1 (DAB) - Body ground Always 10 kΩ or higher
      1a - Body ground Always 10 kΩ or higher

    NG

    REPLACE ANTENNA CORD SUB-ASSEMBLY

    OK

  6. CHECK NO. 1 AMPLIFIER ANTENNA ASSEMBLY


    1. A004PIXE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Antenna Cord Sub-assembly)
      *b

      Front view of wire harness connector

      (to Digital Audio Broadcasting Antenna Assembly)

      Remove the antenna connector from the antenna cord sub-assembly.

    2. Remove 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
      2 - 1 Always Below 1 Ω
      2a - 1a Always Below 1 Ω
      2 - Body ground Always 10 kΩ or higher
      2a - Body ground Always 10 kΩ or higher

    NG

    REPLACE NO. 1 AMPLIFIER ANTENNA ASSEMBLY Click here

    OK

  7. 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 output.

    OK

    END (DIGITAL AUDIO BROADCASTING ANTENNA ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

  8. CHECK ROOF ANTENNA POLE SUB-ASSEMBLY


    1. Check that the roof antenna pole sub-assembly is securely installed.

      OK
      The roof antenna pole sub-assembly is installed properly

    NG

    REINSTALL ROOF ANTENNA POLE SUB-ASSEMBLY

    OK

  9. CHECK ANTENNA CORD SUB-ASSEMBLY


    1. A004TN7E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Radio and Display Receiver Assembly)
      *b

      Front view of wire harness connector

      (to No. 1 Amplifier Antenna Assembly)

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

    2. Remove the antenna connector from the No. 1 amplifier antenna assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (DAB) - 2 Always Below 1 Ω
      1a - 2a Always Below 1 Ω
      1 (DAB) - Body ground Always 10 kΩ or higher
      1a - Body ground Always 10 kΩ or higher

    NG

    REPLACE ANTENNA CORD SUB-ASSEMBLY

    OK

  10. CHECK NO. 1 AMPLIFIER ANTENNA ASSEMBLY


    1. A004S3PE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Antenna Cord Sub-assembly)
      *b

      Front view of wire harness connector

      (to Digital Audio Broadcasting Antenna Assembly)

      Remove the antenna connector from the antenna cord sub-assembly.

    2. Remove 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
      2 - 1 Always Below 1 Ω
      2a - 1a Always Below 1 Ω
      2 - Body ground Always 10 kΩ or higher
      2a - Body ground Always 10 kΩ or higher

    NG

    REPLACE NO. 1 AMPLIFIER ANTENNA ASSEMBLY Click here

    OK

  11. 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 output.

    OK

    END (DIGITAL AUDIO BROADCASTING ANTENNA ASSEMBLY IS DEFECTIVE)

    NG

  12. CHECK ROOF ANTENNA POLE SUB-ASSEMBLY


    1. Replace the roof antenna pole sub-assembly with a known good one.

    2. Clear the DTCs Click here.

    3. Check for DTCs Click here.

      OK
      No DTCs are output.

    OK

    END (ROOF ANTENNA POLE SUB-ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here