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 No.

Detection Item

DTC Detection Condition

Trouble Area

B157D

DAB Tuner Antenna Disconnected

The digital audio broadcasting antenna cable is not connected.

  • Antenna cord sub-assembly

  • No. 2 antenna cord sub-assembly

  • No. 3 antenna cord sub-assembly

  • Roof antenna pole sub-assembly

  • Antenna with holder assembly

  • Radio and display receiver assembly

WIRING DIAGRAM

E288613E03

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

    Result

    Proceed to

    OK

    NG
    NG

    SECURELY CONNECT DAB RADIO ANTENNA CABLE

    OK

  2. CHECK ANTENNA CORD SUB-ASSEMBLY

    1. E288617C02

      *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 - 1

      Always

      Below 1 Ω

      DB-1a - 1a

      Always

      Below 1 Ω

      DB-1 - Body ground

      Always

      10 kΩ or higher

      DB-1a - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE ANTENNA CORD SUB-ASSEMBLY

    Click here

    OK

  3. CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY

    1. E288615C01

      *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

      1 - 2

      Always

      Below 1 Ω

      1a - 2a

      Always

      Below 1 Ω

      1 - Body ground

      Always

      10 kΩ or higher

      1a - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY

    Click here

    OK

  4. CHECK NO. 3 ANTENNA CORD SUB-ASSEMBLY

    1. E288616C01

      *a

      Front view of wire harness connector

      (to No. 2 Antenna Cord Sub-assembly)

      *b

      Front view of wire harness connector

      (to Antenna with Holder Assembly)

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

    2. Remove the antenna connector from the antenna with holder 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

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE NO. 3 ANTENNA CORD SUB-ASSEMBLY

    Click here

    OK

  5. CHECK ROOF ANTENNA POLE SUB-ASSEMBLY

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

      Click here

      OK

      The roof antenna pole sub-assembly is installed properly

    Result

    Proceed to

    OK

    NG
    NG

    REINSTALL ROOF ANTENNA POLE SUB-ASSEMBLY

    Click here

    OK

  6. CHECK ROOF ANTENNA POLE SUB-ASSEMBLY

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

      Click here

    2. Clear the DTCs.

      Click here

      Body Electrical > Navigation System > Clear DTCs

    3. Check for DTCs.

      Click here

      Body Electrical > Navigation System > Trouble Codes

      OK

      No DTCs are output.

    Result

    Proceed to

    OK

    NG
    OK

    END (ROOF ANTENNA POLE SUB-ASSEMBLY IS DEFECTIVE)

    NG

  7. CHECK ANTENNA WITH AMPLIFIER ASSEMBLY

    1. Replace the antenna with holder assembly with a known good one.

      Click here

    2. Clear the DTCs.

      Click here

      Body Electrical > Navigation System > Clear DTCs

    3. Check for DTCs.

      Click here

      Body Electrical > Navigation System > Trouble Codes

      OK

      No DTCs are output.

    Result

    Proceed to

    OK

    NG
    OK

    END (ANTENNA WITH HOLDER ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

    Click here