Radio Broadcast cannot be Received or Poor Reception [11/2020 - 12/2022]: 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 [11/2020 - ] 

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 and display receiver assembly connector.
2. Check for noise
   1. Turn the ignition switch to ON with the radio and display receiver assembly connector connected.
   2. Turn the radio and display receiver assembly on and tune into AM mode.
   3. 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 can be heard from the speakers.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [11/2020 - 12/2022] 

Result: 

OK 

See step  4

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 BACK WINDOW GLASS (WINDOW GLASS ANTENNA WIRE) 

Result: 

OK 

See step  5

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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	Ignition switch ACC, radio switch on and FM or AM selected	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [11/2020 - 12/2022] 

Result: 

OK 

See step  6

1. Disconnect the antenna connector from the radio and display receiver assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *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)

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) - E-3	Always	Below 1 Ω
   RA-4 - E-3a	Always	Below 1 Ω
   RA-1 (SUB) - E-4	Always	Below 1 Ω
   RA-2 - E-4a	Always	Below 1 Ω
   RA-5 (ANT+) - E-1	Always	Below 1 Ω
   RA-3 (MAIN) - Body ground	Always	10 kΩ or higher
   RA-4 - Body ground	Always	10 kΩ or higher
   RA-1 (SUB) - Body ground	Always	10 kΩ or higher
   RA-2 - Body ground	Always	10 kΩ or higher
   RA-5 (ANT+) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE ANTENNA CORD SUB-ASSEMBLY. Refer to  REMOVAL [11/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 12/2022] 

Result: 

OK 

See step  7

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to antenna cord sub-assembly)
   *b	Front view of wire harness connector (to telephone antenna assembly)
   *c	Front view of wire harness connector (to No. 1 amplifier antenna assembly)

2. Disconnect the antenna connector from the telephone antenna assembly.
3. Disconnect the antenna connector from the No. 1 amplifier antenna assembly.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY. Refer to  REMOVAL [11/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 12/2022] 

Result: 

OK 

See step  8

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to No. 1 Amplifier Antenna Assembly)
   *b	Front view of wire harness connector (to Back Window Glass [Window Glass Antenna Wire])

2. Disconnect the antenna connector from the back window glass (window glass antenna wire).
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B-2 - A-1	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE NO. 3 ANTENNA CORD SUB-ASSEMBLY. Refer to  REMOVAL [11/2020 - ] 

Result: 

OK 

See step  9

1. Replace the No. 1 amplifier antenna assembly with a new or known good one.

   Refer to REMOVAL [11/2020 - ]

   OK

   Radio broadcasts can be received normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (NO. 1 AMPLIFIER ANTENNA ASSEMBLY IS DEFECTIVE) 

Result: 

NG 

See step  10

1. Replace the telephone antenna assembly with a new or known good one.

   Refer to REMOVAL [11/2020 - 11/2021] , or refer to REMOVAL [11/2021 - 12/2022]

   OK

   Radio broadcasts can be received normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (TELEPHONE ANTENNA ASSEMBLY IS DEFECTIVE) 

Result: 

NG 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [11/2020 - 12/2022]