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 MANUALSTOYOTA2025SEQUOIA CAPSTONEREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSSMART KEY SYSTEM (FOR START) - DIAGNOSTICS - INTRODUCTIONSMART KEY SYSTEM (FOR START FUNCTION)HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - ]CAUTION / NOTICE / HINT
2025 Toyota Sequoia Capstone
Caution / Notice / Hint
2025 Toyota Sequoia CapstoneSECTION Caution / Notice / Hint
NOTE:
- Do not perform "Smart Code Reset" (all key ID erasure) until all malfunctions and symptoms have been confirmed and resolved. If all key ID erasure is performed without confirming or resolving malfunctions, key registration will be unable to be performed, resulting in unnecessary part replacement.
- Make sure that the smart key system has not been disabled by a customize setting.
HINT:
- Replace parts related to the wireless door lock control system and smart key system according to the inspection procedure.
- If the wireless door lock control system and smart key system do not operate, check the customize settings and make sure that the wireless door lock control system and smart key system are not disabled.
- The wireless door lock control system and smart key system primarily use the following systems.
- Power door lock control system
- Wireless door lock control system
- Smart Key system (for Entry Function)
- Smart Key system (for Start Function)
- Immobiliser function
- If 2 or more electrical key transmitter sub-assemblies are registered to the system, make sure to perform troubleshooting with all of them.
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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.