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 MANUALSTOYOTA2018PRIUS TWO ECOREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTANTI-THEFT SYSTEMSSMART KEY SYSTEM (KEYLESS ENTRY) - DIAGNOSTIC CODES & SYMPTOM TESTS
2018 Toyota Prius Two Eco
Smart Key System (Keyless Entry) - Diagnostic Codes & Symptom Tests
2018 Toyota Prius Two EcoSECTION Smart Key System (Keyless Entry) - Diagnostic Codes & Symptom Tests
- SMART KEY SYSTEM (for Entry Function)
- Operation History List [11/2015 - ]
- DTC B27A1: Open in Driver Side Electrical Antenna Circuit [11/2015 - ]
- DTC B27A2: Open in Front Passenger Side Electrical Antenna Circuit [11/2015 - ]
- DTC B27A5: Open in Front Floor Electrical Key Oscillator Circuit [11/2015 - ]
- DTC B27A6: Open in Rear Floor Electrical Key Oscillator Circuit [11/2015 - ]
- DTC B27A7: Open in Inside Luggage Compartment Electrical Key Oscillator Circuit [11/2015 - ]
- DTC B27A8: Open in Outside Luggage Compartment Electrical Key Antenna Circuit [11/2015 - 12/2018]
- DTC B27A8: Open in Outside Luggage Compartment Electrical Key Antenna Circuit [12/2018 - ]
- All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate [11/2015 - 12/2018]
- All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate [12/2018 - ]
- All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions Operate [11/2015 - ]
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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.