NAVIGATION 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 DAB tuner antenna 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 DAB tuner antenna is not connected

  • Roof antenna pole sub-assembly

  • Antenna with holder assembly

  • No. 3 antenna cord sub-assembly

  • No. 2 antenna cord sub-assembly

  • Antenna cord sub-assembly

  • Radio and display receiver assembly

CAUTION / NOTICE / HINT

Note:

Check that the wire harness is properly installed and does not have any sharp bends, pinching or loose connections.

Click hereClick here

WIRING DIAGRAM

E289433E02

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 hereClick 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 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.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

    Click here

    OK

  4. CHECK NO. 3 ANTENNA CORD SUB-ASSEMBLY

    1. E288794C01

      *a

      Front view of wire harness connector

      (to Antenna with Holder Assembly)

      *b

      Front view of wire harness connector

      (to No. 2 Antenna Cord Sub-assembly)

      Disconnect the antenna connector from the antenna with holder assembly.

    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 - 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

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE NO. 3 ANTENNA CORD SUB-ASSEMBLY

    Click here

    OK

  5. CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY

    1. E288795C01

      *a

      Front view of wire harness connector

      (to No. 3 Antenna Cord Sub-assembly)

      *b

      Front view of wire harness connector

      (to Antenna Cord Sub-assembly)

      Disconnect the antenna connector from the No. 3 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

      2 - 1

      Always

      Below 1 Ω

      2-a - 1-a

      Always

      Below 1 Ω

      2 - Body ground

      Always

      10 kΩ or higher

      2-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. E288803C01

      *a

      Front view of wire harness connector

      (to No. 2 Antenna Cord Sub-assembly)

      *b

      Front view of wire harness connector

      (to Radio and Display Receiver Assembly)

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

      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 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 OR REPLACE ROOF ANTENNA POLE SUB-ASSEMBLY

    Click here

    OK

  8. CHECK ANTENNA WITH HOLDER 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