NAVIGATION SYSTEM Radio Broadcast cannot be Received or Poor Reception

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK RADIO AND DISPLAY 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 RADIO AND DISPLAY 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 RADIO ANTENNA


    1. Preparation for check


      1. Remove the roof antenna pole sub-assembly from the amplifier antenna assembly.

    2. Check for noise


      1. Turn the power switch on (ACC) with the radio and display 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 amplifier antenna threaded installation portion for the roof antenna pole sub-assembly and check that noise can be heard from the speakers.

        Result
        Result Proceed to
        Noise does not occur A
        Noise occurs B

    B

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    A

  4. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. A003UKO

      Preparation for check


      1. Remove the antenna connector from the radio and display receiver assembly.

    2. Check for noise


      1. Turn the power switch on (ACC) with the radio and display 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 radio and display receiver assembly antenna jack and check that noise can be heard from the speakers.

        OK
        Noise can be heard from the speakers.

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

  5. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. Disconnect the radio and display receiver assembly connector.

    2. A003TJLE19
      Text in Illustration
      *a

      Component without harness connected

      (Radio and Display 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

      Power switch on (ACC)

      Radio switch on and FM or AM selected

      		 11 to 14 V

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

  6. CHECK ANTENNA CORD SUB-ASSEMBLY


    1. Disconnect the antenna cord sub-assembly.

    2. Measure the resistance of the antenna cord sub-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. CHECK EXTENSION MODULE


    1. A003UKO

      Preparation for check


      1. Remove the antenna connector from the extension module.

    2. Check for noise


      1. Turn the power switch on (ACC) with the extension module connector connected.

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

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

        OK
        Noise can be heard from the speakers.

    NG

    REPLACE EXTENSION MODULE Click here

    OK

  8. INSPECT EXTENSION MODULE


    1. Disconnect the extension module connector.

    2. A003TJLE19
      Text in Illustration
      *a

      Component without harness connected

      (Extension Module)

      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 (ACC)

      Radio switch on and FM or AM selected

      		 11 to 14 V

    NG

    REPLACE EXTENSION MODULE Click here

    OK

  9. 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

    CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY Click here

    OK

    NORMAL OPERATION

  10. CHECK 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

  11. CHECK ROOF ANTENNA POLE SUB-ASSEMBLY


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

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

    NG

    CHECK AND REPLACE ROOF ANTENNA POLE SUB-ASSEMBLY Click here

    OK

  12. 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 RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

    NORMAL OPERATION