Radio Broadcast cannot be Received or Poor Reception [10/2014 - ]: 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

Result: 

B 

REPLACE NAVIGATION ECU SUB-ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )

Result: 

A 

See step  2

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 not installed.	A
   Optional components are installed.	B

   NOTE:

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

Result: 

B 

REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE) 

Result: 

A 

See step  3

1. Preparation for check

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   1. Remove the antenna connector from the navigation ECU sub-assembly.
2. Check for noise
   1. Turn the power switch on (ACC) with the navigation ECU sub-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 ECU sub-assembly antenna jack and check that noise can be heard from the speakers.

      OK

      Noise can be heard from the speakers.

Result: 

NG 

REPLACE NAVIGATION ECU SUB-ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )

Result: 

OK 

See step  4

1. Check for continuity in the window glass antenna wire.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NOTE:

   When cleaning the glass, wipe it in the direction of the wire with a soft dry cloth. Take care not to damage the wire. Do not use detergents or glass cleaners with abrasive ingredients. When measuring resistance, wrap a piece of tin foil around the tip of each probe and press the foil against the wire with your finger, as shown in the illustration.

   HINT: 

   Check for continuity at the center of each antenna wire as shown in the illustration.

   OK

   There is continuity in the window glass antenna wire.

   TEXT IN ILLUSTRATION
   
   

   *a	Tester Probe
   *b	Antenna Wire
   *c	Tin Foil

Result: 

NG 

REPAIR WINDOW GLASS ANTENNA WIRE 

(Refer to REPAIR [10/2014 - ] )

Result: 

OK 

See step  5

1. Disconnect the RA navigation ECU sub-assembly connector.
2. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

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

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Navigation ECU Sub-assembly)

Result: 

NG 

REPLACE NAVIGATION ECU SUB-ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )

Result: 

OK 

See step  6

1. Replace the antenna cord sub-assembly with a new or known good one and check if radio broadcasts can be received normally (Refer to REMOVAL [10/2014 - ] ).

   OK

   Radio broadcasts can be received normally.

Result: 

OK 

END 

Result: 

NG 

See step  7

1. Replace the No. 2 antenna cord sub-assembly with a new or known good one and check if radio broadcasts can be received normally (Refer to REMOVAL [10/2014 - ] ).

   OK

   Radio broadcasts can be received normally.

Result: 

OK 

END 

Result: 

NG 

See step  8

1. Replace the amplifier antenna assembly with a new or known good one and check if radio broadcasts can be received normally (Refer to REMOVAL [10/2014 - ] ).

   OK

   Radio broadcasts can be received normally.

Result: 

OK 

END 

Result: 

NG 

REPLACE NAVIGATION ECU SUB-ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )