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 MANUALSSUBARU2016LEGACY 2.5IREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSIMMOBILIZER SYSTEM (DIAGNOSTICS)
2016 Subaru Legacy 2.5i
Immobilizer System (Diagnostics)
2016 Subaru Legacy 2.5iSECTION Immobilizer System (Diagnostics)
- Basic Diagnostic Procedure
- General Description
- Electrical Component Location
- Immobilizer Control Module I/O Signal
- Subaru Select Monitor
- Read Diagnostic Trouble Code (DTC)
- Clear Memory Mode
- Inspection Mode
- Read Current Data
- Freeze Frame Data Display
- Diagnostics Chart for Security Indicator Light
- List of Diagnostic Trouble Code (DTC)
- Diagnostic Procedure with Diagnostic Trouble Code (DTC)
- DTC B1401 Meter Collation
- DTC B1402 Immobilizer Key Collation
- DTC B1407 Met Communication
- DTC B1408 Meter Non-Volatile Memory
- DTC B1410 Transponder Communication
- DTC B1411 Immobilizer Antenna
- DTC B1412 Immobilizer Control Module Can Register Stuck
- DTC B1413 Immobilizer Control Module Battery Power Supply
- DTC B1414 Immobilizer Control Module Non-Volatile Memory
- DTC B1570 Antenna
- DTC B1571 Reference Code Incompatibility (Immobilizer Control Module To ECM)
- DTC B1572 IMM Circuit Except Antenna Circuit
- DTC B1574 Key Communication
- DTC B1575 Incorrect Immobilizer Key
- DTC B1576 EGI Control Module EEPROM
- DTC B1577 IMM Control Module EEPROM
- DTC B1578 Meter
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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.