NAVIGATION SYSTEM (for DVD) Radio Broadcast cannot be Received or Poor Reception

INSPECTION PROCEDURE

PROCEDURE

1. CHECK NAVIGATION 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 NAVIGATION RECEIVER ASSEMBLY Click here

   A

2. CHECK OPTIONAL COMPONENTS

   
   

   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

         Note

         Do not remove optional components without the permission of the customer.

   
   

   B

   CHECK RADIO ANTENNA Click here

   A

   REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)

3. CHECK RADIO ANTENNA

   
   

   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

4. CHECK NAVIGATION RECEIVER ASSEMBLY

   
   

   1. 

      Preparation for check

      
      

      1. Remove the antenna plug 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

5. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - ANTENNA AMPLIFIER ASSEMBLY)

   
   

   1. 

      Disconnect the L120 navigation receiver assembly connector.

   2. 

      Disconnect the L36 antenna amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition L120-8 (ANT) - L36-2 (B) Always Below 1 Ω L120-8 (ANT) - Body ground Always 10 kΩ or higher

      Text in Illustration

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

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

6. INSPECT NAVIGATION RECEIVER ASSEMBLY

   
   
   1. 

      Text in Illustration

      *1	Front view of wire harness connector (to Antenna Amplifier Assembly)

      Reconnect the L120 navigation receiver assembly connector.

   2. Disconnect the L36 antenna amplifier assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition L36-2 (B) - Body ground Power switch on (IG) Radio switch on 8 V or higher

   
   

   NG

   REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

   OK

7. CHECK ANTENNA CORD

   
   

   1. Remove the antenna plug 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

8. REPLACE AMPLIFIER ANTENNA ASSEMBLY

   
   

   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