NAVIGATION SYSTEM(for SD), Diagnostic DTC:B157D

DTC Code DTC Name
B157D DAB Tuner Antenna Disconnected

DESCRIPTION

This DTC is stored when a malfunction occurs in the DAB tuner antenna which is connected to the navigation receiver assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area
B157D DAB Tuner Antenna Disconnected The DAB tuner antenna is not connected

  • Windshield glass (DAB antenna)

  • Digital audio broadcasting antenna

  • No. 4 antenna cord sub-assembly

  • No. 2 antenna cord sub-assembly

  • Antenna cord sub-assembly

  • Navigation receiver assembly

WIRING DIAGRAM

A01VA4EE04

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


      Body Electrical > Navigation System > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > Navigation System > Trouble Codes
      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    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 a telephone antenna, are installed.

      OK
      Optional components are installed.

      Note

      Do not remove optional components without permission of the customer.

      Result
      Proceed to
      OK
      NG

    OK

    REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)

    NG

  3. CHECK WINDSHIELD GLASS (DAB ANTENNA)


    1. Check the windshield glass (DAB antenna).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE WINDSHIELD GLASS (DAB ANTENNA) Click here

    OK

  4. CHECK NO. 4 ANTENNA CORD SUB-ASSEMBLY


    1. A01V7WKC01
      *a

      Front view of wire harness connector

      (to Windshield Glass [DAB Antenna])
      *b

      Front view of wire harness connector

      (to No. 2 Antenna Cord Sub-assembly)

      Disconnect the antenna connector from the windshield glass (DAB antenna).

    2. Disconnect 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
      1 - 1 Always Below 1 Ω
      1-a - 1-a Always Below 1 Ω
      1 - Body ground Always 10 kΩ or higher
      1-a - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NO. 4 ANTENNA CORD SUB-ASSEMBLY Click here

    OK

  5. CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY


    1. A01V855C01
      *a

      Front view of wire harness connector

      (to No. 4 Antenna Cord Sub-assembly)
      *b

      Front view of wire harness connector

      (to Antenna Cord Sub-assembly)

      Disconnect the antenna connector from the No. 4 antenna cord sub-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 - 1 Always Below 1 Ω
      1-a - 1-a Always Below 1 Ω
      1 - Body ground Always 10 kΩ or higher
      1-a - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY Click here

    OK

  6. CHECK ANTENNA CORD SUB-ASSEMBLY


    1. A01V9QQC01
      *a

      Front view of wire harness connector

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

      Front view of wire harness connector

      (to Navigation Receiver Assembly)

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

    2. Disconnect the antenna connector from the navigation receiver assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 1 Always Below 1 Ω
      1-a - 1-a Always Below 1 Ω
      1 - Body ground Always 10 kΩ or higher
      1-a - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ANTENNA CORD SUB-ASSEMBLY Click here

    OK

  7. 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


      Body Electrical > Navigation System > Clear DTCs

    3. Recheck for DTCs and check that no DTCs are output.

      Click here


      Body Electrical > Navigation System > Trouble Codes
      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    OK

    END (DIGITAL AUDIO BROADCASTING ANTENNA ASSEMBLY IS DEFECTIVE)

    NG

  8. CHECK WINDSHIELD GLASS (DAB ANTENNA)


    1. Replace the windshield glass (DAB antenna) with a known good one.

      Click here

    2. Clear the DTCs.

      Click here


      Body Electrical > Navigation System > Clear DTCs

    3. Recheck for DTCs and check that no DTCs are output.

      Click here


      Body Electrical > Navigation System > Trouble Codes
      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    OK

    END (WINDSHIELD GLASS [DAB ANTENNA] IS DEFECTIVE)

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here