AUDIO AND VISUAL SYSTEM, Diagnostic DTC:B157D

DTC Code DTC Name
B157D DAB Tuner Antenna Disconnected

DESCRIPTION

This DTC is stored when a malfunction occurs in the No. 2 amplifier antenna assembly which is connected to the multi-media module receiver assembly.

DTC Code DTC Detection Condition Trouble Area
B157D The No. 2 amplifier antenna assembly is not connected

  • Antenna cord sub-assembly

  • No. 2 antenna cord sub-assembly

  • No. 3 antenna cord sub-assembly

  • No. 2 amplifier antenna assembly

  • Multi-media module receiver assembly

WIRING DIAGRAM

A000Q0XE04

PROCEDURE


  1. CHECK CONNECTION OF DAB RADIO ANTENNA CABLE


    1. Check if the DAB radio antenna cable is securely connected to the multi-media module 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. A000RGGE03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Multi-media Module Receiver Assembly)
      *b

      Front view of wire harness connector

      (to No. 2 Antenna Cord Sub-assembly)

      Remove the antenna connector from the multi-media module 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 (DAB) - 2 Always Below 1 Ω
      DB-1 (DAB) - Body ground Always 10 kΩ or higher

    NG

    REPLACE ANTENNA CORD SUB-ASSEMBLY Click here

    OK

  3. CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY


    1. A000SDXE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Antenna Cord Sub-assembly)
      *b

      Front view of wire harness connector

      (to No. 3 Antenna Cord Sub-assembly)

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

    2. Remove the antenna connector from the No. 3 antenna cord sub-assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 - 3 Always Below 1 Ω
      2 - Body ground Always 10 kΩ or higher

    NG

    REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY Click here

    OK

  4. CHECK NO. 3 ANTENNA CORD SUB-ASSEMBLY


    1. A000N8KE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to No. 2 Antenna Cord Sub-assembly)
      *b

      Front view of wire harness connector

      (to No. 2 Amplifier Antenna Assembly)

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

    2. Remove the antenna connector from the No. 2 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
      3 - Body ground Always 10 kΩ or higher

    NG

    REPLACE NO. 3 ANTENNA CORD SUB-ASSEMBLY Click here

    OK

  5. REPLACE NO. 2 AMPLIFIER ANTENNA ASSEMBLY


    1. Replace the No. 2 amplifier antenna assembly with a new or normally functioning one Click here.


    NEXT

  6. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  7. CHECK DTC


    1. Recheck for DTCs and check if the same DTC is output again Click here.

      OK
      No DTCs are output.

    OK

    END (NO. 2 AMPLIFIER ANTENNA ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here