Wiring Explanation

3UZ-FE VVT-i Manual Wiring

3UZ-FE VVT-i manual standalone wiring details for Toyota/Lexus V8 engine swaps.

This page is for 3UZ-FE VVT-i manual standalone wiring projects using OEM Toyota/Lexus engine management as the base.

Harness inspection, plug identification, and rebuild/adaptation path.
Power feeds, grounds, ignition switched feeds, start/run wiring, and diagnostic access planning.
Client plug layout for the swap vehicle interface where applicable.
Bench check before shipping when the ECU, harness, and required parts are supplied together.

Engine	3UZ-FE VVT-i
Transmission	Manual
ECU	Part number and immobilizer status
Vehicle	Swap vehicle and intended dash/ignition setup

Send with the harness

Send the engine harness, ECU, ignitors or related modules, and any body plugs requested for the job.

Include the matching client form so the work can be checked against the engine, ECU, transmission, and swap details.

Clear photos of ECU labels, plug faces, missing connectors, and the swap vehicle wiring help prevent delays.