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 MANUALSTOYOTA2009TUNDRA 2WD V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULETESTING AND INSPECTIONPROGRAMMING AND RELEARNING
2009 Toyota Tundra 2WD V8-4.7L (2UZ-FE)
Programming and Relearning
2009 Toyota Tundra 2WD V8-4.7L (2UZ-FE)SECTION Programming and Relearning
2UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: REGISTRATION
REGISTRATION
NOTE: The Vehicle Identification Number (VIN) must be input into the replacement ECM.
HINT: The VIN is in the form of a 17-digit alphanumeric vehicle identification number. The Techstream is required to register the VIN.
1. DESCRIPTION
NOTE: The Vehicle Identification Number (VIN) must be input into the replacement ECM.
HINT: This registration section consists of two parts: Read VIN and Write VIN.
(a) Read VIN: Explains the VIN reading process in a flowchart. This process allows the VIN stored in the ECM to be read in order to confirm that the two VINs, provided with the vehicle and stored in the vehicle's ECM, are the same.
(b) Write VIN: Explains the VIN writing process in a flowchart. This process allows the VIN to be input into the ECM. If the ECM is changed, or the ECM VIN and vehicle VIN do not match, the VIN can be registered, or overwritten in the ECM by following this procedure.
2. READ VIN
(a) Confirm the vehicle VIN.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream ON.
(e) Enter the following menus: Powertrain / Engine and ECT / Utility / VIN / VIN Read.
3. WRITE VIN
(a) Confirm the vehicle VIN.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream ON.
(e) Enter the following menus: Powertrain / Engine and ECT / Utility / VIN / VIN Write.
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.