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. 2 antenna cord sub-assembly

  • Roof antenna pole sub-assembly

  • No. 1 amplifier antenna assembly

  • Radio and display receiver assembly

WIRING DIAGRAM

A01IT55E04

INSPECTION PROCEDURE

Note

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 ANTENNA CORD SUB-ASSEMBLY


    1. A01INDZE01
      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. 2 Antenna Cord Sub-assembly)

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

    2. Remove 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 - 3 Always Below 1 Ω
      DB-1a - 3a Always Below 1 Ω
      DB-1 - Body ground Always 10 kΩ or higher
      DB-1a - Body ground Always 10 kΩ or higher

    NG

    REPLACE ANTENNA CORD SUB-ASSEMBLY

    OK

  3. CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY


    1. A01IP1OE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Antenna Cord Sub-assembly)
      *b

      Front view of wire harness connector

      (to No. 1 Amplifier Antenna Assembly)

      Remove the antenna connector from the antenna cord sub-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
      3 - 1 Always Below 1 Ω
      3a - 1a Always Below 1 Ω
      3 - Body ground Always 10 kΩ or higher
      3a - Body ground Always 10 kΩ or higher

    NG

    REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY Click here

    OK

  4. 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

  5. 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.

    NG

    CHECK NO. 1 AMPLIFIER ANTENNA ASSEMBLY Click here

    OK

    END (ROOF ANTENNA POLE SUB-ASSEMBLY IS DEFECTIVE)

  6. CHECK NO. 1 AMPLIFIER ANTENNA ASSEMBLY


    1. Replace the No. 1 amplifier 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.

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

    END (NO. 1 AMPLIFIER ANTENNA ASSEMBLY IS DEFECTIVE)