2uzfe Ecu Pinout ((full)) May 2026

The Ultimate Guide to the 2UZ-FE ECU Pinout: Wiring, Swaps, and Diagnostics

The Toyota 2UZ-FE is legendary. As a 4.7-liter, 32-valve, dual-overhead-cam V8, it powered some of the most reliable vehicles ever built, including the Land Cruiser 100 Series (UZJ100), Lexus LX470, 4th-generation Toyota 4Runner, Tundra, and Sequoia.

Power/Ground: MREL (EFI Relay), +B (Battery Power), and E1 (Engine Ground).

Early 100 Series Land Cruiser: These systems often include additional pins for the automatic transmission indicator and transfer case actuator. 2uzfe ecu pinout

The Toyota 2UZ-FE V8 engine is a legendary powerplant, known for its million-mile durability in the Land Cruiser, Sequoia, and Tundra. However, when it comes to engine swaps or troubleshooting electrical gremlins, the ECU (Engine Control Unit) wiring is often the biggest hurdle. Because this engine spanned over a decade, the pinouts changed significantly with the introduction of VVT-i and Drive-by-Wire systems.

The 2UZ-FE ECU uses various terminals to monitor and control the engine's performance. Below are some of the primary pins and their roles: Ignition & Timing: The Ultimate Guide to the 2UZ-FE ECU Pinout:

Have a specific pin you are stuck on? Post the connector shape and wire color; the community runs on shared pinout data.

Pinout Cheat Sheet for Swappers (VVTi)

Need to start the engine with a bare harness? Here are the mandatory pins: Early 100 Series Land Cruiser: These systems often

For common applications like the 2004–2006 Toyota Tundra or Land Cruiser 100, the Engine Control Module (ECM) uses multiple connectors (labeled E3 through E7) to manage the Sequential Fuel Injection (SFI) and ignition systems. Terminal Symbol Connector-Pin Description Standard Voltage/Condition MREL EFI Main Relay 9–14 V (Ignition ON) +B / +B2 Power source for ECU 9–14 V (Ignition ON) VC Sensor power supply 4.5–5.5 V (Ignition ON) NE+ / NE- E5-25 / E5-24 Crankshaft Position Pulse generation (Engine idling) G2+ / G2- E5-19 / E5-29 Camshaft Position Pulse generation (Engine idling) #10 to #80 E5/E7 pins Fuel Injectors 1–8 Pulse generation (Engine idling) IGT1 to IGT8 E7/E5 pins Ignition Signals Pulse generation (Engine idling) M+ / M- E7-5 / E7-4 Throttle Motor Pulse generation (Engine idling) Key Wiring & Component Guides

BATT: Constant 12V from the battery to maintain ECU memory (trim values/codes).