AUDIO AND VISUAL SYSTEM > Radio Broadcast cannot be Received (Bad Reception)

for Preparation Click here


WIRING DIAGRAM


E160804E03


INSPECTION PROCEDURE

1.CHECK RADIO RECEIVER ASSEMBLY

  1. Check if the radio auto-search functions properly.

    1. Tune the radio using the auto-search function and check that it operates normally.

      OK:
      The radio auto-search functions properly.



NG
Go to step 2
OK

END 

2.CHECK OPTIONAL COMPONENTS

  1. Check if any optional components, such as a telephone antenna, are installed.

    OK:
    Optional component(s) installed.



NG
Go to step 3
OK

EFFECT FROM OPTIONAL COMPONENTS 

3.CHECK ANTENNA FOR NOISE PRODUCTION

  1. With the ignition switch to ACC, turn on the radio and select the AM mode.

  1. Remove the roof antenna pole sub-assembly.

  1. Place the tip of a screwdriver on the antenna and check that noise is heard from the speaker.

    OK:
    Noise occurs.

  1. Install the roof antenna pole sub-assembly.



NG
Go to step 4
OK

REPLACE RADIO RECEIVER ASSEMBLY (Click here)  

4.CHECK INSTALLATION OF ANTENNA GROUND

  1. Check that the antenna amplifier ground is securely fastened to the body.

    OK:
    Ground is securely fastened to body.

  1. Check that the No. 2 antenna cord sub-assembly ground is securely fastened to the body.

    OK:
    Ground is securely fastened to body.



NG
CORRECTLY INSTALL GROUND
OK


5.CHECK AMPLIFIER ANTENNA ASSEMBLY


    E160805E03

  1. Disconnect the amplifier antenna connectors.

  1. With the ignition switch to ON, turn on the radio and select the AM mode.

  1. Place the tip of a screwdriver against the metal terminal of the No. 2 antenna cord sub-assembly and check that noise is heard from the speaker.

    OK:
    Noise occurs.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    1(ANT) - Body ground
    		During radio (AM) reception
    		11 to 14 V

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to No. 2 Antenna Cord Sub-Assembly)

  1. Reconnect the amplifier antenna connectors.



NG
Go to step 6
OK

REPLACE ANTENNA AMPLIFIER ASSEMBLY (Click here)  

6.CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY


    E176082E01

  1. Disconnect the antenna cord sub-assembly connector.

  1. With the ignition switch to ON, turn on the radio and select the AM mode.

  1. Place the tip of a screwdriver against the metal terminal of the antenna cord sub-assembly and check that noise is heard from the speaker.

    OK:
    Noise occurs.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    1(ANT +B) - Body ground
    		During radio (AM) reception
    		11 to 14 V

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Antenna Cord Sub-Assembly)

  1. Reconnect the antenna cord sub-assembly connector.



NG
Go to step 7
OK

REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY (Click here)  

7.CHECK ANTENNA CORD SUB-ASSEMBLY


    E176048E01

  1. Remove the antenna plug of the radio receiver assembly.

  1. With the radio receiver connector connected, turn the ignition switch to ACC.

  1. Turn on the radio and select the AM mode.

  1. Place the tip of a screwdriver or a piece of metal, such as a thin wire, on the antenna jack of the radio receiver. Check that noise is heard from the speakers.

    OK:
    Noise occurs.

    Text in Illustration 
    *1
    		Component without antenna plug
    (to Radio Receiver Assembly)



    E139631E02

  1. Disconnect the D60 amplifier antenna connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    D60-2(ANT) - Body ground
    		During radio (AM) reception
    		11 to 14 V

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Antenna Cord Sub-Assembly)

  1. Reconnect the amplifier antenna connector.

  1. Install the antenna plug.



NG
Go to step 8
OK

REPLACE ANTENNA CORD SUB-ASSEMBLY (Click here)  

8.CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - ANTENNA CORD SUB-ASSEMBLY)


    E176050E01

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    D61-8(ANT) - D61-7(GND)
    		During radio (AM) reception
    		11 to 14 V

    Text in Illustration 
    *1
    		Component with harness connected
    (Radio Receiver Assembly)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE RADIO RECEIVER ASSEMBLY (Click here)