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 MANUALSTOYOTA2009SEQUOIA LIMITED, 5.7 Y, RWDREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSTHEFT DETERRENT & KEYLESS ENTRYENGINE IMMOBILIZER SYSTEMDTC B279C THEFT DETERRENT SYSTEM PRESENCE DETECTIONINSPECTION PROCEDURE
2009 Toyota Sequoia Limited, 5.7 Y, RWD
Inspection Procedure
2009 Toyota Sequoia Limited, 5.7 Y, RWDSECTION Inspection Procedure
- CLEAR DTC
- Clear the DTC (See DTC CHECK/CLEAR ).
- CHECK FOR DTC
- Check for DTC (See DTC CHECK/CLEAR
).
OK: DTC B279C is not output.
Result
RESULT REFERENCEResult Proceed to OK A NG (for 2UZ-FE) B NG (for 3UR-FE) C NG (for 3UR-FBE) D
B: REPLACE ECM (See REMOVAL )
C: REPLACE ECM (See REMOVAL )
D: REPLACE ECM (See REMOVAL )
A: USE SIMULATION METHOD TO CHECK (See HOW TO PROCEED WITH TROUBLESHOOTING )
- Check for DTC (See DTC CHECK/CLEAR
).
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.