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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA20184RUNNER SR5, 4WDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTANTI-THEFT SYSTEMSSMART KEY SYSTEM (FOR ENTRY FUNCTION) - DIAGNOSTIC CODES & SYMPTOM TESTS
2018 Toyota 4Runner SR5, 4WD
Smart Key System (For Entry Function) - Diagnostic Codes & Symptom Tests
2018 Toyota 4Runner SR5, 4WDSECTION Smart Key System (For Entry Function) - Diagnostic Codes & Symptom Tests
- SMART KEY SYSTEM (for Entry Function)
- Operation History List [08/2019 - 08/2021]
- Operation History List [08/2021 - 08/2022]
- Operation History List [08/2022 - ]
- DTC B27A1: Open in Driver Side Electrical Antenna Circuit [08/2015 - 08/2019]
- DTC B27A1: Open in Driver Side Electrical Antenna Circuit [08/2019 - ]
- DTC B27A2: Open in Front Passenger Side Electrical Antenna Circuit [08/2015 - 08/2019]
- DTC B27A2: Open in Front Passenger Side Electrical Antenna Circuit [08/2019 - ]
- DTC B27A5: Open in Front Floor Electrical Key Oscillator Circuit [08/2015 - 08/2019]
- DTC B27A5: Open in Front Floor Electrical Key Oscillator Circuit [08/2019 - ]
- DTC B27A6: Open in Rear Floor Electrical Key Oscillator Circuit [08/2015 - 08/2019]
- DTC B27A6: Open in Rear Floor Electrical Key Oscillator Circuit [08/2019 - ]
- DTC B27A7: Open in Inside Luggage Compartment Electrical Key Oscillator Circuit [08/2015 - 08/2019]
- DTC B27A7: Open in Inside Luggage Compartment Electrical Key Oscillator Circuit [08/2019 - ]
- DTC B27A8: Open in Outside Luggage Compartment Electrical Key Antenna Circuit [08/2015 - 08/2019]
- DTC B27A8: Open in Outside Luggage Compartment Electrical Key Antenna Circuit [08/2019 - ]
- All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate [08/2015 - 08/2019]
- All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate [08/2019 - ]
- All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions Operate [08/2015 - 08/2019]
- All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions Operate [08/2019 - ]
- Driver Side Door Entry Unlock Function does not Operate [08/2015 - 08/2019]
- Driver Side Door Entry Unlock Function does not Operate [08/2019 - ]
- Front Passenger Side Door Entry Unlock Function does not Operate [08/2015 - 08/2019]
- Front Passenger Side Door Entry Unlock Function does not Operate [08/2019 - ]
- Driver Side Door Entry Lock and Unlock Functions do not Operate [08/2015 - 08/2019]
- Driver Side Door Entry Lock and Unlock Functions do not Operate [08/2019 - ]
- Front Passenger Side Door Entry Lock and Unlock Functions do not Operate [08/2015 - 08/2019]
- Front Passenger Side Door Entry Lock and Unlock Functions do not Operate [08/2019 - ]
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.