2uzfe Ecu Pinout -

Check the color codes above—Toyota was mercifully consistent with wire colors across decades. If the wire is Light Green with a Black stripe , it is almost always the Engine Coolant Temp sensor on every 2UZ made.

Never back-probe E6-18 with power. This is a dedicated sensor ground. If you ground it to chassis instead of the ECU, you will create a ground loop and introduce massive signal noise. Connector E7 (Outputs & Ignition) | Pin | Wire Color | Function | Notes | | :--- | :--- | :--- | :--- | | E7-1 | Black/Yellow | Starter Relay Control | Grounds to engage starter | | E7-4 | Gray/Red | Ignition Coil #1 (IGT1) | 5V trigger from ECU | | E7-5 | Gray | Ignition Coil #2 (IGT2) | 5V trigger | | E7-6 | Violet | Fuel Pump Relay Control | Grounds to turn pump ON | | E7-20 | Red/White | Check Engine Light (MIL) | Switched ground to cluster | Part 4: The 2005+ VVTi & Drive-by-Wire Pinout Changes If you have an engine from a 2005-2007 Tundra or 2006-2011 Land Cruiser, stop using the chart above. You need the "Electronic Throttle Control System" pinout. 2uzfe ecu pinout

The ECU pinout for the 2UZ-FE is not just a wiring diagram; it is the Rosetta Stone for making this indestructible engine run. This is a dedicated sensor ground