Ignition switch signal that tells the ECU the key is turned to "ON".

Comprehensive Guide to 2UZ-FE ECU Pinout: Understanding Toyota's 4.7L V8 Wiring

If you are performing a standalone swap (wiring the engine into a non-factory chassis without the rest of the donor vehicle), you only need to wire a fraction of the total ECU pins. Use this checklist to get the engine started: Step 1: Establish Clean Grounds

Ground trigger signal sent to the fuel pump relay to prime and run the fuel pump.

While specific pin numbers vary, these are the core functions you will locate on a 2UZ-FE ECU diagram. Power & Ground Constant 12V Power (Memory) +B: Ignition Switch 12V +B2: Secondary Ignition Switch 12V E01, E02, E03: Main Engine Grounds E1: Sensor Ground Engine Sensors THW: Water Temperature Sensor (Coolant) THA: Intake Air Temperature Sensor PIM/MAP: Manifold Absolute Pressure Sensor VTA1 / VTA2: Throttle Position Sensor 1 & 2 (ETCS-i) VG: Air Flow Meter (MAF) Signal NE+, NE-: Crankshaft Position Sensor G+, G-: Camshaft Position Sensor Fuel and Ignition

The Ultimate Toyota 2UZ-FE ECU Pinout Guide: Wiring, Swaps, and Troubleshooting

The 2UZ-FE engine, a 4.0-liter V6 powerhouse, has been a stalwart in Toyota's lineup for years, renowned for its reliability and performance. At the heart of this engine's operation lies the Engine Control Unit (ECU), a sophisticated computer that orchestrates the intricate dance of fuel injection, ignition timing, and emissions control. This paper presents an in-depth examination of the 2UZ-FE ECU pinout, providing a detailed analysis of its connector layout, pin assignments, and signal descriptions. By deciphering the ECU's pinout, tuners, enthusiasts, and engineers can gain a deeper understanding of the engine's control systems, enabling optimized tuning, troubleshooting, and modification.

This is the lifeline. Pins A1–A4 are dedicated Engine Ground . Do not combine these. Run each directly to the cylinder head.

Overview: Historical engine control system diagrams comparing setups can be found in the Toyota 2UZ History PDF. 2UZ-FE VVT Manual Wiring - Lexus V8 Engines LLC

Individual Fuel Injector drive signals.

Early Land Cruiser 100-Series, LX470, Tundra, and Sequoia.