Radio Wave Reception Failure [09/2022 - ]: Procedure

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

   OK

   Automatic station search function stops on a station.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] 

Result: 

NG 

See step  2

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 not installed.

   NOTE:

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE) 

Result: 

OK 

See step  3

1. Preparation for check

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   1. Disconnect the RA radio receiver assembly connector.
2. Check for noise
   1. Turn the ignition switch to ON with the radio receiver assembly connector connected.
   2. Turn the radio receiver assembly on and tune into FM mode.
   3. Place a screwdriver, thin wire or other metal object on the radio receiver assembly antenna jack and check that noise can be heard from the speakers.

      OK

      Noise can be heard from the speakers.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [09/2022 - ] 

Result: 

OK 

See step  4

1. Disconnect the RA radio receiver assembly connector.
2. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Radio Receiver Assembly)

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   RA-1 (ANT+) - Body ground	Ignition switch ACC Radio switch on	7.0 to 16 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [09/2022 - ] 

Result: 

OK 

See step  5

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   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.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR WINDOW GLASS ANTENNA WIRE. Refer to  REPAIR [06/2018 - ] 

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 [09/2022 - ]

   OK

   Radio broadcasts can be received normally.

   Result

   Proceed to
   OK
   NG

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 [09/2022 - ]

   OK

   Radio broadcasts can be received normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

See step  8

1. Replace the No. 1 amplifier antenna assembly with a new or known good one and check if radio broadcasts can be received normally.

   Refer to REMOVAL [09/2022 - ]

   OK

   Radio broadcasts can be received normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

See step  9

1. Replace the No. 4 antenna cord sub-assembly with a new or known good one and check if radio broadcasts can be received normally.

   Refer to REMOVAL [09/2022 - ]

   OK

   Radio broadcasts can be received normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [09/2022 - ]