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

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DTC Code DTC Name
B157D DAB Tuner Antenna Disconnected
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DESCRIPTION

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

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

  • Antenna cord sub-assembly

  • No. 2 antenna cord sub-assembly

  • Amplifier antenna assembly

  • Radio and display receiver assembly
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INSPECTION PROCEDURE

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PROCEDURE


  1. Click here

    CHECK ANTENNA CORD SUB-ASSEMBLY


    1. Replace the antenna cord sub-assembly (Click here).

    2. Clear the DTCs (Click here).

    3. Recheck for DTCs and check if the same DTC is output again.

      OK
      No DTCs are output.

  2. Click here

    END (ANTENNA CORD SUB-ASSEMBLY IS DEFECTIVE)

  3. Click here

    INSPECT NO. 2 ANTENNA CORD SUB-ASSEMBLY


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

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

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

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

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    CHECK AMPLIFIER ANTENNA ASSEMBLY NO.1


    1. Replace the amplifier antenna assembly (Click here).

    2. Clear the DTCs (Click here).

    3. Recheck for DTCs and check if the same DTC is output again.

      OK
      No DTCs are output.

  5. Click here

    END (AMPLIFIER ANTENNA ASSEMBLY IS DEFECTIVE)

  6. Click here

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLYClick here

  7. Click here

    REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLYClick here