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 MANUALSTOYOTA20254RUNNER SR5, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 30 (SMART KEY SYSTEM (FOR START, HEV) - SYMPTOM TESTS)
2025 Toyota 4Runner SR5, 4WD
Section 30 (Smart Key System (For Start, HEV) - Symptom Tests)
2025 Toyota 4Runner SR5, 4WDSECTION Section 30 (Smart Key System (For Start, HEV) - Symptom Tests)
WARNING: This page is about a different variant/trim than selected.
- SMART KEY SYSTEM (for Start Function, HEV Model)
- Engine does not Start [12/2024 - ]
- Power Source Mode does not Change to ON (IG and ACC) [12/2024 - ]
- Power Source Mode does not Change to ON (IG) [12/2024 - ]
- Power Source Mode does not Change to ON (ACC) [12/2024 - ]
- Power Source Mode does not Change to ON (READY) [12/2024 - ]
- New Key cannot be Registered [12/2024 - ]
- Additional Key cannot be Registered [12/2024 - ]
- New Key Registration Warning Message is not Displayed [12/2024 - ]
- System Malfunction Message is Displayed on the Multi-information Display [12/2024 - ]
- Security Indicator Light Does not Blink [12/2024 - ]
- Immobiliser System does not Operate Properly [12/2024 - ]
RENDER: 1.0x
NO RELATED
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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.