2012 Lexus IS 250C Automatic TransFACTORY OEM SERVICE PROCEDURE

Cellular Phone cannot Send/Receive: Procedure

  1. CHECK "Bluetooth" SETTINGS 
    1. Check if the "Bluetooth" settings are correct.

      OK

      "Bluetooth" settings are correct.

    NG → SET SETTINGS CORRECTLY 

    OK: Go to next step 

  2. CHECK CELLULAR PHONE 
    1. Check if the cellular phone is "Bluetooth" compatible.

      HINT: 

      Some versions of "Bluetooth" compatible cellular phones may not function.

      OK

      The phone is "Bluetooth" compatible.

    NG → END (ONLY A "Bluetooth" COMPATIBLE CELLULAR PHONE CAN BE USED) 

    OK: Go to next step 

  3. CHECK SETTINGS 
    1. Check if the cellular phone functions.

      HINT: 

      The cellular phone is unable to call under any of the following conditions:

      • The cellular phone is locked.
      • The directory is being transferred.
      • The line is crossed.
      • Outside service range
      • The power is off.
      • The cellular phone is not connected to "Bluetooth" ("BT" is displayed while connected).

        OK

        None of the above conditions exist.

    NG → SET SETTINGS CORRECTLY 

    OK: Go to next step 

  4. CHECK CELLULAR PHONE 
    1. Check if the cellular phone can make a call.

      HINT: 

      When the battery is low, calls cannot be made or received.

      OK

      Cellular phone can make a call.

    NG → REPAIR OR REPLACE CELLULAR PHONE 

    OK: Go to next step 

  5. CHECK RECEPTION 
    1. Set the cellular phone so that it can receive calls.
    2. Place the cellular phone close to the radio receiver assembly.
    3. Check if the cellular phone has reception according to the radio receiver assembly.

      OK

      The cellular phone has reception.

    NG → See step   6 

    OK → See step   7 

  6. REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL 
  7. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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