NAVIGATION SYSTEM Radio Broadcast cannot be Received or Poor Reception

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK NAVIGATION RECEIVER ASSEMBLY


    1. Check the radio's automatic station search function.


      1. Check the radio's automatic station search function by activating it.

        OK
        The radio's automatic station search function works properly.

    NG

    CHECK OPTIONAL COMPONENTS Click here

    OK

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

  2. CHECK OPTIONAL COMPONENTS


    1. Check optional components (sun-shade film, telephone antenna, etc.).


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

        OK
        Optional components are installed.

        Note

        Do not remove any optional components installed by the customer without his or her consent.


    NG

    CHECK NAVIGATION RECEIVER ASSEMBLY Click here

    OK

    REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)

  3. CHECK NAVIGATION RECEIVER ASSEMBLY


    1. A003U0K

      Preparation for check


      1. Remove the antenna plug from the navigation receiver assembly.

    2. Check for noise


      1. Turn the power switch on (ACC) with the navigation receiver assembly connector connected.

      2. Turn the radio on and put into AM mode.

      3. Place a screwdriver, thin wire, or other metal object on the navigation receiver assembly's antenna jack and check that noise can be heard from the speaker.

        OK
        Noise occurs.

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    OK

  4. INSPECT NAVIGATION RECEIVER ASSEMBLY


    1. A003TJLE18
      Text in Illustration
      *a

      Component without harness connected

      (Navigation Receiver Assembly)

      Disconnect the RA navigation receiver assembly connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      RA-5 (ANT+) - Body ground

      Power switch on (IG)

      Radio switch on

      		 11 to 14 V

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    OK

  5. CHECK ROOF ANTENNA POLE SUB-ASSEMBLY


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

      OK
      The roof antenna pole sub-assembly is installed properly.

    NG

    CHECK AND REINSTALL ROOF ANTENNA POLE SUB-ASSEMBLY Click here

    OK

  6. CHECK ANTENNA CORD SUB-ASSEMBLY


    1. Remove the antenna plug of the navigation receiver assembly and amplifier antenna assembly.

    2. Measure the resistance between the amplifier antenna assembly and navigation receiver assembly to check for an open circuit in the antenna cord sub-assembly.

      Standard Resistance
      Below 1 Ω

    3. Measure the resistance between the antenna cord sub-assembly and body ground to check for a short circuit in the antenna cord sub-assembly.

      Standard Resistance
      10 kΩ or higher

    NG

    REPLACE ANTENNA CORD SUB-ASSEMBLY Click here

    OK

  7. REPLACE AMPLIFIER ANTENNA ASSEMBLY


    1. Replace the amplifier antenna assembly and check that it operated normally Click here.

      OK
      The amplifier antenna assembly operates normally.

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    OK

    NORMAL OPERATION