2uzfe Ecu Pinout | 99% RELIABLE |

The 2UZ-FE engine, common in the Toyota Land Cruiser, Tundra, and Sequoia, utilizes a complex Engine Control Module (ECM) to manage its sequential fuel injection (SFI) and ignition systems. The ECU pinout varies slightly between non-VVTi (early 2000s) and VVTi models (roughly 2005+), but the core power, ground, and sensor terminal logic remains consistent across the platform. Core ECU Terminals and Standard Voltages

Early Tundra models (2000–2004) use a different pin layout compared to later VVT-i versions (2005+), which added secondary air injection and different ETCS-i protocols. VVT-i Models: These ECUs include additional pins for OCV (Oil Control Valves) to manage variable valve timing. LC100 Factory Service Manual Troubleshooting Tips 2uz lc100 wiring and fitting instructions UZJ100 to KZJ78 2uzfe ecu pinout

• Pin 1 (BATT): Constant +12V (Memory)
• Pin 2 (BATT): Constant +12V (Main)
• Pin 4 (E01): High-current ground (Injectors/Coils)
• Pin 8 (+B): Main relay output (+12V switched)
• Pin 19 (MREL): Main relay control (ECU tells relay to click on)

g., Tundra, Land Cruiser, Sequoia) to ensure you have the exact pin configuration? 2UZ-FE ECU Pinout and Wiring Diagram | PDF - Scribd The 2UZ-FE engine, common in the Toyota Land

Late Non-VVTi (2003–2004): These introduced Drive-by-Wire (ETCS-i). The pinouts changed to accommodate the electronic throttle motor and pedal position sensor. Pin 1 (BATT): Constant +12V (Memory) Pin 2

• Non-VVT-i (1998-2002): 3-plug ECU. Simpler emissions, cable throttle.
• VVT-i (2003-2006): 4-plug ECU. Added variable valve timing, electronic throttle (ETCS-i).
• VVT-i (2007-2009): Internal changes for federal emissions.

Whether you are diagnosing a P1120 (TPS malfunction), building a custom off-road buggy, or performing a stand-alone swap, you cannot guess the wiring. One wrong pin and you’re replacing a $2,000 ECU or frying a VVTi solenoid.