Audio And Visual System (W/ Multi-Display) Radio Broadcast Cannot Be Received Or Poor Reception

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK MULTI-MEDIA MODULE RECEIVER ASSEMBLY

CHECK OPTIONAL COMPONENTS

CHECK MULTI-MEDIA MODULE RECEIVER ASSEMBLY

CHECK QUARTER WINDOW ASSEMBLY (WINDOW GLASS ANTENNA WIRE)

INSPECT MULTI-MEDIA MODULE RECEIVER ASSEMBLY

CHECK ANTENNA CORD SUB-ASSEMBLY

CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY

CHECK NO. 1 AMPLIFIER ANTENNA ASSEMBLY

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

Check that the antenna cable is properly installed and does not have any sharp bends, pinching or loose connections.

1. Check the radio automatic station search 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.
   

   NOTICE:

   Do not remove optional components without permission of the customer.

   OK:

   Optional components are installed.
   

1. Remove the antenna connector from the multi-media module receiver assembly.
   

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

   OK:

   Noise can be heard from the speaker.
   

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

1. Disconnect the multi-media module receiver assembly connector.
   

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   RA-5 (ANT+) - Body ground	Engine switch on (ACC), radio switch on and FM or AM selected	11 to 14 V

   Text in Illustration

   *a	Component without harness connected (Multi-media Module Receiver Assembly)

1. Remove the antenna connector from the multi-media module receiver assembly.
   

2. Remove 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) or 4 - Body ground	Always	10 kΩ or higher
   RA-1 (SUB) or 3 - Body ground	Always	10 kΩ or higher
   RA-5 (ANT+) or 2 - Body ground	Always	10 kΩ or higher

   Text in Illustration

   *a	Front view of wire harness connector (to Multi-media Module Receiver Assembly)
   *b	Front view of wire harness connector (to No. 2 Antenna Cord Sub-assembly)

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

2. Remove 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 or 4 - Body ground	Always	10 kΩ or higher
   3 or 3 - Body ground	Always	10 kΩ or higher
   2 or 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 new or known good one and check if radio broadcasts can be received normally (Click here).
   

   OK:

   Radio broadcasts can be received.