NAVIGATION SYSTEM (for DVD) 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 that may decrease reception capacity, such as sunshade film or a telephone antenna, 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. A017DOU

      Preparation for check


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

    2. Check for noise


      1. Turn the ignition switch on (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'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. CHECK GLASS ANTENNA


    1. A017E1JE01

      Check for continuity of the antenna.

      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 the negative probe and press the foil against the wire with your finger, as shown in the illustration.

      OK
      There is continuity in the antenna.

    NG

    REPAIR GLASS ANTENNA Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - ANTENNA AMPLIFIER)


    1. A017FW8E30

      Disconnect navigation receiver assembly connector E6.

    2. A017BI7E03

      Disconnect antenna amplifier connector E5.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      E6-8 (ANT) - E5-1 (B) Always Below 1 Ω
      E6-8 (ANT) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT NAVIGATION RECEIVER ASSEMBLY


    1. A017BI7E03

      Reconnect navigation receiver assembly connector E6.

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

      Standard voltage
      Tester Connection Condition Specified Condition
      E5-1 (B) - Body ground

      Ignition switch on (IG)

      Radio switch ON

      		 11 to 14 V

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    OK

  7. CHECK ANTENNA CORD


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

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

      Standard resistance
      Below 1 Ω

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

      Standard resistance
      10 kΩ or higher

    NG

    REPLACE ANTENNA CORD Click here

    OK

  8. REPLACE ANTENNA AMPLIFIER


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

      OK
      Radio broadcasts can be received.

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    OK

    NORMAL OPERATION