Audio And Visual System Radio Broadcast Cannot Be Received Or Poor Reception

INSPECTION PROCEDURE

CHECK RADIO RECEIVER

CHECK OPTIONAL COMPONENTS

CHECK RADIO RECEIVER

CHECK GLASS ANTENNA

CONFIRM MODEL

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - ANTENNA AMPLIFIER)

INSPECT RADIO RECEIVER

CHECK ANTENNA CORD

REPLACE AMPLIFIER ANTENNA

INSPECTION PROCEDURE

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 function stops on a station	A
      Automatic station search function does not stop	B

1. Check for optional components (sunshade 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.
      
      

      Result:

      
      

      Result	Proceed to
      Optional components are installed	A
      Optional components are not installed	B

      NOTICE:

      Do not remove any optional components installed by the customer without his or her consent.

1. Preparation for check
   

   1. Remove the antenna plug from the radio receiver.
      

2. Check for noise
   

   1. Turn the ignition switch to ACC with the radio receiver 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 receiver antenna jack and check that noise can be heard from the speaker.
      

      OK:

      Noise can be heard from the speaker.
      

      Text in Illustration

      *1	Component without harness connected (Radio Receiver*3)
      *2	Component without harness connected (Radio Receiver*4)

      1. *3: w/ Microphone
         
      1. *4: w/o Microphone
         

1. Check for continuity of the antenna.
   

   HINT:

   Check for continuity at the center of each antenna wire as shown in the illustration.

   NOTICE:

   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.
   

Result:

Result	Proceed to
w/o Microphone	A
w/ Microphone	B

1. Disconnect the radio receiver and antenna amplifier connectors.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   F6-8 (ANT) - F15-1 (B)	Always	Below 1 Ω
   F6-8 (ANT) - Body ground	Always	10 kΩ or higher

   Text in Illustration

   *1	Front view of wire harness connector (to Radio Receiver)
   *2	Front view of wire harness connector (to Antenna Amplifier)

1. Reconnect the F15 connector.
   

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   K-2 (+B) - Body ground	Ignition switch ACC Radio switch on	11 to 14 V
   F15-1 (B) - Body ground	Ignition switch ACC Radio switch on	11 to 14 V

   Text in Illustration

   *1	Component without harness connected (Radio Receiver)*3
   *2	Front view of wire harness connector (to Antenna Amplifier)*4

   1. *3: w/ Microphone
      
   1. *4: w/o Microphone
      

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

2. Measure the resistance between the antenna and radio receiver 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
   

1. Replace the amplifier antenna and check if radio broadcasts can be received normally (CAMRY_ACV40 RM0000026JG00RX.html).
   

   OK:

   Radio broadcasts can be received.