AUDIO AND VISUAL SYSTEM (w/o Navigation System) > Radio Broadcast cannot be Received or Poor Reception

for Preparation Click here

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

B	Go to step 2

A
REPLACE RADIO RECEIVER ASSEMBLY (Click here)

1. Check 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 optional components without the permission of the customer.

B	Go to step 3

A
REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)

1. Preparation for check
   

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

2. Check for noise
   

   1. Turn the power switch on (ACC) with the radio 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 RECEIVER ASSEMBLY (Click here)

A

1. Preparation for check
   

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

2. Check for noise
   

   1. Turn the power switch on (ACC) with the radio 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 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 RECEIVER ASSEMBLY (Click here)

OK

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 each probe and press the foil against the wire with your finger, as shown in the illustration.

   OK:

   There is continuity in the antenna.
   

NG	REPAIR WINDOW GLASS ANTENNA WIRE (Click here)

OK

1. Disconnect the radio receiver assembly connector.
   

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   RA1-5 (ANT+) - Body ground	Power switch on (ACC) Radio switch on	11 to 14 V

   Text in Illustration 

   *a	Component without harness connected (Radio Receiver Assembly)

NG	REPLACE RADIO RECEIVER ASSEMBLY (Click here)

OK

1. Remove the antenna connector of the radio receiver assembly and antenna.
   

2. Measure the resistance between the antenna and radio receiver assembly 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
   

NG	REPLACE RADIO ANTENNA CORD (Click here)

OK

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

OK

1. Replace the roof antenna assembly and check if radio broadcasts can be received normally (Click here).
   

   OK:

   Radio broadcasts can be received.
   

NG	Go to step 10

OK
NORMAL OPERATION

1. Replace the amplifier antenna assembly and check if radio broadcasts can be received normally (Click here).
   

   OK:

   Radio broadcasts can be received.
   

NG	REPLACE RADIO RECEIVER ASSEMBLY (Click here)

OK
NORMAL OPERATION