NAVIGATION SYSTEM, 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 assembly which is connected to the radio and display receiver assembly.

DTC Code DTC Detection Condition Trouble Area
B157D The digital audio broadcasting antenna assembly is not connected

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

  • Roof antenna pole sub-assembly (for Wagon)

  • Digital audio broadcasting antenna assembly

  • Amplifier antenna assembly (for Sedan)

  • Amplifier antenna assembly (for Glass Side) (for Wagon)

  • Antenna cord sub-assembly

  • Radio and display receiver assembly

WIRING DIAGRAM

A004TJ5E05
A004TJ5E06

CAUTION / NOTICE / HINT

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 FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      No DTCs are output.

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  2. CHECK OPTIONAL COMPONENTS


    1. Check if any optional components that may decrease reception capacity, such as sunshade film or a telephone antenna, are installed.

      OK
      Optional components are installed.

      Note

      Do not remove optional components without permission of the customer.


    OK

    REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)

    NG

  3. CONFIRM MODEL

    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. A004NUYE27
      Text in Illustration
      *a Tester Probe
      *b Antenna Wire
      *c Tin Foil

      Check for continuity in the window glass antenna wire.

      Tech Tips

      Check for continuity at the center of each antenna wire as shown in the illustration.

      Note

      When cleaning the glass, wipe it in the direction of the wire with a soft dry cloth. Take care not to damage the wire. Do not use detergents or glass cleaners with abrasive ingredients. When measuring resistance, wrap a piece of tin foil around the tip of each probe and press the foil against the wire with your finger as shown in the illustration.

      OK
      There is continuity in the window glass antenna wire.

    NG

    REPAIR BACK WINDOW GLASS (WINDOW GLASS ANTENNA WIRE) Click here

    OK

  5. 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

  6. CHECK AMPLIFIER ANTENNA ASSEMBLY


    1. A004SHLE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Digital Audio Broadcasting Antenna Assembly)
      *b

      Front view of wire harness connector

      (to Antenna Cord Sub-assembly)

      Disconnect the antenna connector from the digital audio broadcasting antenna assembly.

    2. Disconnect the antenna connector from the 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
      1-a - 2-a Always Below 1 Ω
      1 - Body ground Always 10 kΩ or higher
      1-a - Body ground Always 10 kΩ or higher

    NG

    REPLACE AMPLIFIER ANTENNA ASSEMBLY Click here

    OK

  7. CHECK ANTENNA CORD SUB-ASSEMBLY


    1. A004QLWE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Amplifier Antenna Assembly)
      *b

      Front view of wire harness connector

      (to Radio and Display Receiver Assembly)

      Disconnect the antenna connector from the amplifier antenna assembly.

    2. Disconnect the antenna connector from the radio and display receiver assembly.

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

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

    NG

    REPLACE ANTENNA CORD SUB-ASSEMBLY Click here

    OK

  8. 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

  9. CHECK ROOF ANTENNA POLE SUB-ASSEMBLY


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


    NG

    CHECK AND REPLACE ROOF ANTENNA POLE SUB-ASSEMBLY

    OK

  10. 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

  11. CHECK AMPLIFIER ANTENNA ASSEMBLY (for Glass Side)


    1. A004RX2E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Digital Audio Broadcasting Antenna Assembly)
      *b

      Front view of wire harness connector

      (to Antenna Cord Sub-assembly)

      Disconnect the antenna connector from the digital audio broadcasting antenna assembly.

    2. Disconnect the antenna connector from the 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
      1-a - 2-a Always Below 1 Ω
      1 - Body ground Always 10 kΩ or higher
      1-a - Body ground Always 10 kΩ or higher

    NG

    REPLACE AMPLIFIER ANTENNA ASSEMBLY (for Glass Side) Click here

    OK

  12. CHECK ANTENNA CORD SUB-ASSEMBLY


    1. A004QLWE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Amplifier Antenna Assembly [for Glass Side])
      *b

      Front view of wire harness connector

      (to Radio and Display Receiver Assembly)

      Disconnect the antenna connector from the amplifier antenna assembly (for glass side).

    2. Disconnect the antenna connector from the radio and display receiver assembly.

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

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

    NG

    REPLACE ANTENNA CORD SUB-ASSEMBLY Click here

    OK

  13. 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