NAVIGATION SYSTEM (for HDD) > 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 does not stop	A
      Automatic station search function stops on a station	B

B	REPLACE NAVIGATION RECEIVER ASSEMBLY (Click here)

A

1. Check optional components (sun-shade 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 amplifier antenna assembly.
      

2. Check for noise
   

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

A

1. Preparation for check
   

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

2. Check for noise
   

   1. Turn the power switch on (ACC) with the navigation 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 navigation receiver assembly antenna jack and check that noise can be heard from the speaker.
      

      OK:

      Noise occurs.
      

NG	REPLACE NAVIGATION RECEIVER ASSEMBLY (Click here)

OK

1. Disconnect the RA navigation receiver assembly connector.
   

2. 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 (IG) Radio switch on	8 V or higher

NG	REPLACE NAVIGATION RECEIVER ASSEMBLY (Click here)

OK

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

2. Measure the resistance between the antenna and navigation 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 ANTENNA CORD (Click here)

OK

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 NAVIGATION RECEIVER ASSEMBLY (Click here)

OK
NORMAL OPERATION