2uzfe Ecu Pinout

Before looking at pins, you must identify your engine harness/ECU year. The 2UZ-FE went through three main phases:

Note: The diagrams below primarily apply to the 2000–2004 Non-Drive-by-Wire (Cable Throttle) ECUs, typically found in Tundras/Sequoias (Engine Code 89661-0D...). 2uzfe ecu pinout

Since most swap questions revolve around the later, more complex VVTi engine, we’ll focus there. The ECU (Part numbers like 89661-6A380) uses four 22-pin connectors (A, B, C, D). That’s 88 potential circuits. Before looking at pins, you must identify your

Before chasing sensors, ensure the ECU is alive. Use a multimeter on these pins. Note: The diagrams below primarily apply to the

| Function | Typical Pin Location (Connector C) | Wire Color (Approx) | | :--- | :--- | :--- | | Battery +12V (Backup) | Pin 1 (C) | White/Red | | Switched Ignition +12V (IG SW) | Pin 5 (C) | Black/Yellow | | Power Ground (ECU Main) | Pin 14, 15 (C) | White/Black | | Sensor Ground (Signal Return) | Pin 13 (C) | Brown |

Tech Tip: The 2UZ-FE is sensitive to ground offsets. If the voltage between pin 14 (power ground) and pin 13 (sensor ground) fluctuates more than 0.1V, you will see erratic sensor readings and transmission shifting issues.

This is the most common pinout for engine swaps into older chassis (FJ60, 1st-gen Tundra, buggies). We are using the USA-spec UZJ100 Land Cruiser (1999) as reference. Wire colors are Toyota standard.