AUDIO AND VISUAL SYSTEM(for Radio and Display Type) Radio Broadcast cannot be Received or Poor Reception

WIRING DIAGRAM

A004G7ME24

CAUTION / NOTICE / HINT

Note

Check that the wire harness is properly installed and does not have any sharp bends, pinching or loose connections Click here.

PROCEDURE


  1. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY


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

      OK
      Automatic station search function stops on a station.

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  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.

      OK
      Optional components are not installed.

      Note

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


    NG

    REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)

    OK

  3. CHECK RADIO ANTENNA


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

    2. Turn the ignition switch to ACC with the radio and display receiver assembly connector connected.

    3. Place a screwdriver, thin wire or other metal object on the amplifier antenna threaded installation position for the roof antenna pole sub-assembly, and check that noise can be heard from the speakers.

      OK
      Noise can be heard from the speakers.

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    NG

  4. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. A004EV3

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

    2. Turn the ignition switch to ACC with the radio and display receiver 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 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. A004E4AE46

      Disconnect the RA radio and display receiver assembly connector.

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

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

      Ignition switch 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. A004G4ME04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Radio and Display Receiver Assembly)
      *b

      Front view of wire harness connector

      (to No. 2 Antenna Cord Sub-assembly)

      Disconnect the radio and display receiver assembly connector.

    2. Remove the antenna connector from the No. 2 antenna cord sub-assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      RA-3 (MAIN) - 2 Always Below 1 Ω
      RA-5 (ANT+) - 3 Always Below 1 Ω
      RA-3 (MAIN) - Body ground Always 10 kΩ or higher
      RA-5 (ANT+) - Body ground Always 10 kΩ or higher

    NG

    REPLACE ANTENNA CORD SUB-ASSEMBLY Click here

    OK

  7. CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY


    1. A004ELCE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Antenna Cord Sub-assembly)
      *b

      Front view of wire harness connector

      (to No. 1 Amplifier Antenna Assembly)

      Remove the antenna connector from the antenna cord sub-assembly.

    2. Remove the antenna connector from the No. 1 amplifier antenna assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 - 2 Always Below 1 Ω
      3 - 3 Always Below 1 Ω
      2 - Body ground Always 10 kΩ or higher
      3 - Body ground Always 10 kΩ or higher

    NG

    REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY Click here

    OK

  8. CHECK ROOF ANTENNA POLE SUB-ASSEMBLY


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

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

    NG

    REINSTALL ROOF ANTENNA POLE SUB-ASSEMBLY

    OK

  9. CHECK ROOF ANTENNA POLE SUB-ASSEMBLY


    1. Replace the roof antenna pole sub-assembly and check if radio broadcasts can be received normally.

      OK
      Radio broadcasts can be received normally.

    OK

    END (ROOF ANTENNA POLE SUB-ASSEMBLY WAS DEFECTIVE)

    NG

  10. CHECK NO. 1 AMPLIFIER ANTENNA ASSEMBLY


    1. Replace the No. 1 amplifier antenna assembly and check if radio broadcasts can be received normally.

      Click here

      OK
      Radio broadcasts can be received normally.

    OK

    END (NO. 1 AMPLIFIER ANTENNA ASSEMBLY WAS DEFECTIVE)

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here