NAVIGATION SYSTEM (for Navigation Receiver Type) Radio Broadcast cannot be Received or Poor Reception

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK NAVIGATION RECEIVER ASSEMBLY


    1. Check the radio automatic station search function.


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

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

    B

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    A

  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.

      Result
      Result Proceed to
      Optional components are not installed. A
      Optional components are installed. B

      Note

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


    B

    REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)

    A

  3. CHECK NAVIGATION RECEIVER ASSEMBLY


    1. A01EV6U

      Preparation for check


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

    2. Check for noise


      1. Turn the ignition switch to ACC with the navigation receiver assembly connector connected.

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

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

        OK
        Noise can be heard from the speakers.

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    OK

  4. CHECK WINDOW GLASS ANTENNA WIRE


    1. A01EVSAE14
      Text in Illustration
      *a Tester Probe
      *b Antenna Wire
      *c Tin Foil

      Check for continuity in the window glass antenna wire.

      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.

      Tech Tips

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

      OK
      There is continuity in the window glass antenna wire.

    NG

    REPAIR WINDOW GLASS ANTENNA WIRE Click here

    OK

  5. INSPECT NAVIGATION RECEIVER ASSEMBLY


    1. Disconnect the RA navigation receiver assembly connector.

    2. A01EV4TE19
      Text in Illustration
      *a

      Component without harness connected

      (Navigation Receiver Assembly)

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

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

      Ignition switch ACC

      Radio switch on and AM or FM selected

      		 11 to 14 V

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    OK

  6. REPLACE ANTENNA CORD SUB-ASSEMBLY


    1. Replace the antenna cord sub-assembly with a new or known good one and check if radio broadcasts can be received normally Click here.

      OK
      Radio broadcasts can be received normally.

    NG

    REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY Click here

    OK

    END

  7. REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY


    1. Replace the No. 2 antenna cord sub-assembly with a new or known good one and check if radio broadcasts can be received normally Click here.

      OK
      Radio broadcasts can be received normally.

    NG

    REPLACE NO. 1 AMPLIFIER ANTENNA ASSEMBLY Click here

    OK

    END

  8. REPLACE NO. 1 AMPLIFIER ANTENNA ASSEMBLY


    1. Replace the No. 1 amplifier antenna assembly with a new or known good one and check if radio broadcasts can be received normally Click here.

      OK
      Radio broadcasts can be received normally.

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    OK

    END