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Radio Broadcast cannot be Received (Poor Reception)

WARNING: This page is about a different car, the 2006 Lexus GS 430 and 2006 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK RADIO RECEIVER ASSEMBLY 
    1. Check the radio's automatic station search function by activating it.

      OK : The radio's automatic station search function works properly. 

    OK : REPLACE RADIO RECEIVER ASSEMBLY 

    NG : GO TO NEXT STEP 

  2. CHECK OPTIONAL COMPONENTS 
    1. Check if optional components, such as the sun-shade film or telephone antenna, that may decrease reception capacity are installed.

      OK : Optional components are installed. 

    OK : REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN 

    NG : GO TO NEXT STEP 

  3. CHECK ANTENNA ASSEMBLY 
    1. Turn the engine switch on (ACC), turn the radio on, and set the radio to AM mode. Touch the tip of a screwdriver on the antenna and check that noise can be heard from the speaker.

      OK : Noise is heard from the speaker. 

    OK : REPAIR ANTENNA ASSEMBLY 

    NG : GO TO NEXT STEP 

  4. CHECK RADIO RECEIVER ASSEMBLY 
    1. Preparation for check
      1. Remove the antenna plug from the radio receiver assembly.
    2. Check for noise
      1. Turn the engine switch on (ACC) with the radio receiver assembly connector connected.
      2. Turn the radio on and put it into AM mode.
      3. Touch a flat head screwdriver, thin wire, or other metal object to the radio receiver's antenna jack, check that noise can be heard from the speaker.

        OK : Noise occurs. 

    NG : REPLACE RADIO RECEIVER ASSEMBLY 

    Fig 1: Identifying Antenna Plug From Radio Receiver Assembly
    G04022135Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE