Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSCION2015FR-S AUTOMATIC TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTANTI-THEFT SYSTEMSENGINE IMMOBILISER SYSTEM (DIAGNOSTIC CODES & SYMPTOM TESTS)
2015 Scion FR-S Automatic Trans
Engine Immobiliser System (Diagnostic Codes & Symptom Tests)
2015 Scion FR-S Automatic TransSECTION Engine Immobiliser System (Diagnostic Codes & Symptom Tests)
- Engine Immobilizer System
- DTC B1401: M Check NG [05/2014 - ]
- DTC B1402: Immobilizer Key Check NG [05/2014 - ]
- DTC B1405: SCU Check NG [05/2014 - ]
- DTC B1406: SCU EEPROM NG [05/2014 - ]
- DTC B1407: M Communication Circuit [05/2014 - ]
- DTC B1408: Meter EEPROM Circuit [05/2014 - ]
- DTC B1409: SCU Communication Circuit [05/2014 - ]
- DTC B1410: Transponder Communication Circuit [05/2014 - ]
- DTC B1411: Immobilizer Antenna Circuit [05/2014 - ]
- DTC B1571: Immobilizer Key Check NG [05/2014 - ]
- DTC B1572: Immobilizer System Communication Malfunction [05/2014 - ]
- DTC B1576: Key Write Malfunction To EFI Ecu [05/2014 - ]
- DTC B1577: Immobilizer System EEPROM Malfunction [05/2014 - ]
- DTC B1578: Immobilizer System Data Mismatch Key [05/2014 - ]
- Symptom Test
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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.