Navigation System (For Navigation Receiver Type) Radio Broadcast Cannot Be Received Or Poor Reception

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK NAVIGATION RECEIVER ASSEMBLY

CHECK OPTIONAL COMPONENTS

CHECK NAVIGATION RECEIVER ASSEMBLY

INSPECT QUARTER WINDOW ASSEMBLY (WINDOW GLASS ANTENNA WIRE)

INSPECT NAVIGATION RECEIVER ASSEMBLY

CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY

CHECK HOLDER ANTENNA ASSEMBLY

WIRING DIAGRAM

INSPECTION PROCEDURE

1. Check the radio automatic station search function by activating it.
   

   OK:

   Automatic station search function stops on a station.
   

1. Check if any optional components that may decrease reception capacity, such as sunshade film or a telephone antenna, are installed.
   

   OK:

   Optional components are installed.
   

   NOTICE:

   Do not remove optional components without permission of the customer.

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

2. Turn the engine switch on (ACC) with the navigation receiver assembly connector connected.
   

3. Turn on the radio and turn into AM mode.
   

4. 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 speakers.
   

   OK:

   Noise occurs.
   

1. Inspect the quarter window assembly (window glass antenna wire) (LandCruiser RM000000VLW035X_01_0001.html).
   

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	Switch Condition	Specified Condition
   5 (ANT+) - Body ground	Engine switch on (ACC) Radio switch on	11 to 14 V

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

2. Disconnect the antenna connector from the holder antenna assembly.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   RA-3 (RMAIN2) - 3	Always	Below 1 Ω
   RA-5 (ANT+) - 1	Always	Below 1 Ω
   RA-3 (RMAIN2) - Body ground	Always	10 kΩ or higher
   RA-5 (ANT+) - Body ground	Always	10 kΩ or higher

   Text in Illustration

   *a	Front view of wire harness connector (to Navigation Receiver Assembly)
   *b	Front view of wire harness connector (to Holder Antenna Assembly)

1. Replace the holder antenna assembly and check if radio broadcasts can be received normally (LandCruiser RM000003AE102MX.html).
   

   OK:

   Radio broadcasts can be received.