Crankshaft position signal. Without this, the ECU won't fire spark or fuel. G2+: Camshaft position signal. VG: Mass Air Flow (MAF) signal. THW: Engine Coolant Temperature (ECT). VTA1 / VTA2: Throttle Position Sensor (TPS) signals. 3. Control Outputs (The "Muscles") #10, #20, #30, #40...: Fuel injector triggers (8 total).
Because there are over a dozen different plug configurations for the 2UZ-FE, you should verify your ECU part number (e.g., ) against a factory service manual. 2uzfe ecu pinout
If you are putting a 2UZ-FE into a different chassis (like a 4Runner or an older Hilux), keep these "gotchas" in mind: Crankshaft position signal
The "Ignition Confirmation" signal. If the ECU doesn't see this return signal from the igniters, it will cut fuel to prevent catalytic converter damage. 4. Communication & Transmission SIL: This is the K-Line for OBD2 diagnostics. VG: Mass Air Flow (MAF) signal
These ECUs typically use four or five plastic connectors. They feature a traditional throttle cable and are the easiest for standalone swaps.
(2005+ models) High-speed Controller Area Network for communicating with the ABS and Transmission modules.
Most 2UZ-FE ECUs from 2000 onwards are "locked" to a specific transponder key. If you don't have the original key and the amplifier ring, the engine will start for 2 seconds and die. You may need an Immobilizer Bypass or a "virginized" ECU.