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HOMESERVICE MANUALSSCION2015FR-S AUTOMATIC TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSENGINE IMMOBILISER SYSTEM (DIAGNOSTIC CODES & SYMPTOM TESTS)ENGINE IMMOBILIZER SYSTEMDTC B1406: SCU EEPROM NG [05/2014 - ]PROCEDURE
2015 Scion FR-S Automatic Trans

DTC B1406: SCU EEPROM NG [05/2014 - ]: Procedure

2015 Scion FR-S Automatic TransSECTION Procedure
  1. REGISTER RECOGNITION CODES (ECU CODE REGISTRATION) 
    1. Register the recognition codes (ECU code registration). Refer to REGISTRATION [05/2014 - ] .

    NEXT: Go to next step 

  2. CHECK FOR DTC 
    1. Check for DTCs. Refer to DTC CHECK / CLEAR [05/2014 - ] .

      OK

      DTC B1406 is not output.

    NG → See step   3 

    OK → END 

  3. REPLACE TRANSPONDER KEY ECU ASSEMBLY. Refer to  REMOVAL [05/2014 - ] 
RENDER: 1.0x

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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.