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AUDIO AND VISUAL SYSTEM > Radio Broadcast cannot be Received or Poor Reception

for Preparation Click here


INSPECTION 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

    NOTICE:
    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 (for Roof).

  1. 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


    E187251

  1. Preparation for check

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

  1. 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.



    E188455E19

  1. 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

    Text in Illustration 
    *a
    		Component without harness connected
    (Radio and Display Receiver Assembly)



NG
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY (Click here)
OK


6.REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY

  1. Replace the No. 2 antenna cord sub-assembly and check if radio broadcasts can be received normally (Click here).

    OK:
    Radio broadcasts can be received normally.



NG
Go to step 7
OK

NORMAL OPERATION 

7.CHECK NO. 4 ANTENNA CORD SUB-ASSEMBLY

  1. Disconnect the No. 4 antenna cord sub-assembly.

  1. Measure the resistance of the No. 4 antenna cord sub-assembly to check for an open circuit in the No. 4 antenna cord sub-assembly.

    Standard Resistance:
    Below 1 Ω

  1. Measure the resistance between the No. 4 antenna cord sub-assembly and body ground to check for a short circuit in the No. 4 antenna cord sub-assembly.

    Standard Resistance:
    10 kΩ or higher



NG
REPLACE NO. 4 ANTENNA CORD SUB-ASSEMBLY (Click here)
OK


8.CHECK NO. 5 ANTENNA CORD SUB-ASSEMBLY

  1. Disconnect the No. 5 antenna cord sub-assembly.

  1. Measure the resistance of the No. 5 antenna cord sub-assembly to check for an open circuit in the No. 5 antenna cord sub-assembly.

    Standard Resistance:
    Below 1 Ω

  1. Measure the resistance between the No. 5 antenna cord sub-assembly and body ground to check for a short circuit in the No. 5 antenna cord sub-assembly.

    Standard Resistance:
    10 kΩ or higher



NG
REPLACE NO. 5 ANTENNA CORD SUB-ASSEMBLY (Click here)
OK


9.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


10.REPLACE AMPLIFIER ANTENNA ASSEMBLY (for Roof)

  1. Replace the amplifier antenna assembly (for Roof) 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