NAVIGATION SYSTEM(for HDD) Radio Broadcast cannot be Received or Poor Reception

PROCEDURE


  1. CHECK NAVIGATION ECU SUB-ASSEMBLY


    1. Check the radio automatic station search function.

    2. Check the radio automatic station search function by activating it.

      Result
      Proceed to
      Automatic station search function does not stop
      Automatic station search function stops on a station

    Automatic station search function stops on a station

    REPLACE NAVIGATION ECU SUB-ASSEMBLY Click here

    Automatic station search function does not stop

  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.

      Note

      Do not remove optional components without the permission of the customer.

      Result
      Proceed to
      Optional components are not installed
      Optional components are installed

    Optional components are installed

    REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)

    Optional components are not installed

  3. CHECK NAVIGATION ECU SUB-ASSEMBLY


    1. A01CYQJ

      Disconnect the antenna connector from the navigation ECU sub-assembly.

    2. Turn the engine switch on (ACC) with the navigation ECU sub-assembly connector connected.

    3. Turn the radio on and tune into AM mode.

    4. Place a screwdriver, thin wire or other metal object on the navigation ECU sub-assembly antenna jack and check that noise can be heard from the speakers.

      Result
      Proceed to
      Noise can be heard from the speakers
      Noise cannot be heard from the speakers

    Noise cannot be heard from the speakers

    REPLACE NAVIGATION ECU SUB-ASSEMBLY Click here

    Noise can be heard from the speakers

  4. INSPECT NAVIGATION ECU SUB-ASSEMBLY


    1. Disconnect the navigation ECU sub-assembly connector.

    2. A01CWE4C15
      *a

      Component without harness connected

      (Navigation ECU Sub-assembly)

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

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

      Engine switch on (ACC)

      Radio switch on and AM or FM selected

      		 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NAVIGATION ECU SUB-ASSEMBLY Click here

    OK

  5. CHECK ANTENNA CORD SUB-ASSEMBLY


    1. Replace the antenna cord sub-assembly.

      Click here

    2. Check if radio broadcasts can be received normally.

      Result
      Proceed to
      Radio broadcasts can be received normally
      Radio broadcasts cannot be received normally

    Radio broadcasts can be received normally

    END (ANTENNA CORD SUB-ASSEMBLY IS DEFECTIVE)

    Radio broadcasts cannot be received normally

  6. CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY


    1. Replace the No. 2 antenna cord sub-assembly.

      Click here

    2. Check if radio broadcasts can be received normally.

      Result
      Proceed to
      Radio broadcasts can be received normally
      Radio broadcasts cannot be received normally

    Radio broadcasts can be received normally

    END (NO. 2 ANTENNA CORD SUB-ASSEMBLY IS DEFECTIVE)

    Radio broadcasts cannot be received normally

  7. CHECK NO. 3 ANTENNA CORD SUB-ASSEMBLY


    1. Replace the No. 3 antenna cord sub-assembly.

      Click here

    2. Check if radio broadcasts can be received normally.

      Result
      Proceed to
      Radio broadcasts can be received normally
      Radio broadcasts cannot be received normally

    Radio broadcasts can be received normally

    END (NO. 3 ANTENNA CORD SUB-ASSEMBLY IS DEFECTIVE)

    Radio broadcasts cannot be received normally

  8. CHECK ROOF ANTENNA POLE SUB-ASSEMBLY


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

      Click here

      Result
      Proceed to
      The roof antenna pole sub-assembly is installed properly
      The roof antenna pole sub-assembly is not installed properly

    The roof antenna pole sub-assembly is installed properly

    END (ROOF ANTENNA POLE SUB-ASSEMBLY IS DEFECTIVE)

    The roof antenna pole sub-assembly is not installed properly

  9. CHECK ANTENNA WITH HOLDER ASSEMBLY


    1. Replace the antenna with holder assembly.

      Click here

    2. Check if radio broadcasts can be received normally.

      Result
      Proceed to
      Radio broadcasts can be received normally
      Radio broadcasts cannot be received normally

    Radio broadcasts can be received normally

    END (ANTENNA WITH HOLDER ASSEMBLY IS DEFECTIVE)

    Radio broadcasts cannot be received normally

    REPLACE NAVIGATION ECU SUB-ASSEMBLY Click here