AUDIO AND VISUAL SYSTEM (for Radio and Display Type with Intuitive Parking Assist System) Radio Broadcast cannot be Received or Poor Reception

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK NAVIGATION ECU SUB-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 ECU SUB-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 ECU SUB-ASSEMBLY


    1. A01HUJA

      Preparation for check


      1. Remove the antenna connector from the navigation ECU sub-assembly.

    2. Check for noise


      1. Turn the power switch on (ACC) with the navigation ECU sub-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 ECU sub-assembly antenna jack and check that noise can be heard from the speakers.

        OK
        Noise can be heard from the speakers.

    NG

    REPLACE NAVIGATION ECU SUB-ASSEMBLY Click here

    OK

  4. CHECK WINDOW GLASS ANTENNA WIRE


    1. A01HTSYE14
      Text in Illustration
      *a Tester Probe
      *b Antenna Wire
      *c Tin Foil

      Check for continuity in the window glass antenna wire.

      Tech Tips

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

      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.

      OK
      There is continuity in the window glass antenna wire.

    NG

    REPAIR WINDOW GLASS ANTENNA WIRE Click here

    OK

  5. INSPECT NAVIGATION ECU SUB-ASSEMBLY


    1. Disconnect the navigation ECU sub-assembly connector.

    2. A01HU55E19
      Text in Illustration
      *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 Condition Specified Condition
      RA-5 (ANT+) - Body ground

      Power switch on (IG)

      Radio switch on and AM or FM selected

      		 11 to 14 V

    NG

    REPLACE NAVIGATION ECU SUB-ASSEMBLY Click here

    OK

  6. REPLACE ANTENNA CORD SUB-ASSEMBLY


    1. Replace the antenna cord sub-assembly and check if radio broadcasts can be received normally Click here.

      OK
      Radio broadcasts can be received normally.

    NG

    INSPECT NO. 2 ANTENNA CORD SUB-ASSEMBLY Click here

    OK

    NORMAL OPERATION

  7. INSPECT NO. 2 ANTENNA CORD SUB-ASSEMBLY


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

    2. Measure the resistance of the No. 2 antenna cord sub-assembly to check for an open circuit in the No. 2 antenna cord sub-assembly.

      Standard Resistance
      Below 1 Ω

    3. Measure the resistance between the No. 2 antenna cord sub-assembly and body ground to check for a short circuit in the No. 2 antenna cord sub-assembly.

      Standard Resistance
      10 kΩ or higher

    NG

    REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY Click here

    OK

  8. REPLACE AMPLIFIER ANTENNA ASSEMBLY


    1. Replace the amplifier antenna assembly and check if radio broadcasts can be received normally Click here.

      OK
      Radio broadcasts can be received normally.

    NG

    REPLACE NAVIGATION ECU SUB-ASSEMBLY Click here

    OK

    NORMAL OPERATION