Audio And Visual System (For Radio And Display Type) Radio Broadcast Cannot Be Received Or Poor Reception

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

CHECK OPTIONAL COMPONENTS

CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

INSPECT QUARTER WINDOW GLASS (WINDOW GLASS ANTENNA WIRE)

INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

CHECK ANTENNA CORD SUB-ASSEMBLY

CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY

CHECK NO. 1 AMPLIFIER ANTENNA ASSEMBLY

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

When replacing the radio and display receiver assembly, it is necessary to perform the vehicle contract setting for Connected Services (w/ Connected Services Function).

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 radio and display receiver assembly.
   

2. Turn the engine switch on (ACC) with the radio and display 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 radio and display receiver assembly antenna jack and check that noise can be heard from the speakers.
   

   OK:

   Noise occurs.
   

1. Inspect the quarter window glass (window glass antenna wire) (Click here).
   

1. Disconnect the RA radio and display 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 radio and display receiver assembly.
   

2. Disconnect the antenna connector from the No. 2 antenna cord sub-assembly.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   RA-3 (MAIN) - 4	Always	Below 1 Ω
   RA-1 (SUB) - 3	Always	Below 1 Ω
   RA-5 (ANT+) - 2	Always	Below 1 Ω
   RA-3 (MAIN) - Body ground	Always	10 kΩ or higher
   RA-1 (SUB) - 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 Radio and Display Receiver Assembly)
   *b	Front view of wire harness connector (to No. 2 Antenna Cord Sub-assembly)

1. Disconnect the antenna connector from the antenna cord sub-assembly.
   

2. Disconnect the antenna connector from the No. 1 amplifier antenna assembly.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   4 - 4	Always	Below 1 Ω
   3 - 3	Always	Below 1 Ω
   2 - 2	Always	Below 1 Ω
   4 - Body ground	Always	10 kΩ or higher
   3 - Body ground	Always	10 kΩ or higher
   2 - Body ground	Always	10 kΩ or higher

   Text in Illustration

   *a	Front view of wire harness connector (to Antenna Cord Sub-assembly)
   *b	Front view of wire harness connector (to No. 1 Amplifier Antenna Assembly)

1. Replace the No. 1 amplifier antenna assembly and check if radio broadcasts can be received normally (Click here).
   

   OK:

   Radio broadcasts can be received.