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 4WD V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSSERVICE PRECAUTIONS
2009 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)
Computers and Control Systems: Service Precautions
2009 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)SECTION Service Precautions
2UZ-FE ENGINE CONTROL: SFI SYSTEM: PRECAUTION
PRECAUTION
CAUTION: When using the Techstream, observe the following items for safety reasons:
- Read its instruction books before using the Techstream.
- Prevent the Techstream cable from being caught on the pedals, shift lever and steering wheel when driving with the Techstream connected to the vehicle.
- When driving the vehicle for testing purposes using the Techstream, 2 persons are required. One person drives the vehicle, and the other operates the Techstream.
NOTICE:
- Perform initialization (throttle position) after replacing the throttle body assembly or cleaning any throttle body components Installation.
- Perform initialization (throttle position) after reconnecting the battery cable or replacing the ECM Installation.
- Perform Dynamic Laser Cruise Control System initialization after replacing the ECM Programming and Relearning.
- Perform Reset Memory (AT initialization) for 2WD after replacing the automatic transmission assembly, engine assembly or ECM .
- Perform Reset Memory (AT initialization) for 4WD after replacing the automatic transmission assembly, engine assembly or ECM Programming and Relearning.
- Perform Registration (VIN registration) after replacing the ECM Programming and Relearning.
HINT: Reset Memory cannot be completed by only removing the battery.
RENDER: 1.0x
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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.