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Home >> Lexus >> 2022 >> UX 200 Base >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> (Audio / Video System) - Diagnostic Codes (2 Of 2) & Symptom Tests (1 Of 2) >> (Audio And Visual System) >> Radio Broadcast cannot be Received or Poor Reception [10/2019 - 07/2022] >> Procedure

Radio Broadcast cannot be Received or Poor Reception [10/2019 - 07/2022]: Procedure

  1. CHECK RADIO RECEIVER ASSEMBLY 
    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 RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [10/2019 - 07/2022] 

    Result: 

    A 

    See step  2

  2. CHECK OPTIONAL COMPONENTS 
    1. Check if any optional components that may decrease reception capacity, such as a sunshade film or 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

  3. CHECK RADIO RECEIVER ASSEMBLY 
    1. Preparation for check
      GTY381638Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Disconnect the antenna connector from the radio receiver assembly.
    2. Check for noise
      1. Turn the ignition switch ACC with the radio receiver 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 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 [10/2019 - 07/2022] 

    Result: 

    OK 

    See step  4

  4. CHECK BACK WINDOW GLASS (WINDOW GLASS ANTENNA WIRE) 
    1. Check for continuity in the window glass antenna wire.
      GTY433000Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Tester Probe
      *b Antenna Wire
      *c Aluminum 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 aluminum 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

  5. INSPECT RADIO RECEIVER ASSEMBLY 
    1. Disconnect the RA radio receiver assembly connector.
    2. Measure the voltage according to the value(s) in the table below.
      GTY432194Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Radio Receiver Assembly)

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      RA-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 RECEIVER ASSEMBLY. Refer to  REMOVAL [10/2019 - 07/2022] 

    Result: 

    OK 

    See step  6

  6. REPLACE ANTENNA CORD SUB-ASSEMBLY 
    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 [10/2018 - 07/2022]

      OK

      Radio broadcasts can be received normally.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END 

    Result: 

    NG 

    See step  7

  7. CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY 
    1. Disconnect the antenna connector from the No. 4 antenna cord sub-assembly.
      GTY791018Courtesy 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 No. 4 Antenna Cord Sub-assembly)
    2. Disconnect the antenna connector from the antenna cord sub-assembly.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      BC-1 - AB-6 Always Below 1 Ω
      BC-1a - AB-6a Always Below 1 Ω
      BC-2 - AB-5 Always Below 1 Ω
      BC-2a - AB-5a Always Below 1 Ω
      BC-3 - AB-4 Always Below 1 Ω
      BC-1 - Body ground Always 10 kΩ or higher
      BC-1a - Body ground Always 10 kΩ or higher
      BC-2 - Body ground Always 10 kΩ or higher
      BC-2a - Body ground Always 10 kΩ or higher
      BC-3 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY. Refer to  REMOVAL [10/2018 - 07/2022] 

    Result: 

    OK 

    See step  8

  8. CHECK NO. 4 ANTENNA CORD SUB-ASSEMBLY 
    1. Disconnect the antenna connector from the No. 5 antenna cord sub-assembly.
      GTY833543Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 2 Antenna Cord Sub-assembly)
      *b Front view of wire harness connector
      (to No. 5 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
      BC-1 - CD-3 Always Below 1 Ω
      BC-1a - CD-3a Always Below 1 Ω
      BC-2 - CD-4 Always Below 1 Ω
      BC-2a - CD-4a Always Below 1 Ω
      BC-3 - CD-2 Always Below 1 Ω
      BC-1 - Body ground Always 10 kΩ or higher
      BC-1a - Body ground Always 10 kΩ or higher
      BC-2 - Body ground Always 10 kΩ or higher
      BC-2a - Body ground Always 10 kΩ or higher
      BC-3 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE NO. 4 ANTENNA CORD SUB-ASSEMBLY. Refer to  REMOVAL [10/2018 - 07/2022] 

    Result: 

    OK 

    See step  9

  9. CHECK NO. 5 ANTENNA CORD SUB-ASSEMBLY 
    1. Disconnect the antenna connector from the rear spoiler sub-assembly.
      GTY816985Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 4 Antenna Cord Sub-assembly)
      *b Front view of wire harness connector
      (to No. 1 Amplifier Antenna Assembly)
      *c Front view of wire harness connector
      (to Rear Spoiler Sub-assembly)
    2. Disconnect the antenna connector from the No. 1 amplifier antenna assembly.
    3. Disconnect the antenna connector from the No. 4 antenna cord sub-assembly.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

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

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE NO. 5 ANTENNA CORD SUB-ASSEMBLY. Refer to  REMOVAL [10/2018 - 07/2022] 

    Result: 

    OK 

    See step  10

  10. CHECK NO. 1 AMPLIFIER ANTENNA ASSEMBLY 
    1. Replace the No. 1 amplifier antenna assembly with a new or known good one.

      Refer to REMOVAL [10/2018 - ]

      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  11

  11. CHECK REAR SPOILER SUB-ASSEMBLY 
    1. Replace the rear spoiler sub-assembly with a new or known good one.

      Refer to REMOVAL [10/2018 - ]

      OK

      Radio broadcasts can be received normally.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END (REAR SPOILER SUB-ASSEMBLY IS DEFECTIVE) 

    Result: 

    NG 

    REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [10/2019 - 07/2022] 

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