2uzfe Ecu Pinout Jun 2026

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 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

: Higher pin density. Introduces dedicated throttle control motor pins ( ) alongside safety monitoring pins. Late VVTi (2005–2011)

The 2UZ-FE ECU pinout varies significantly depending on whether the engine is a (found in early Land Cruisers and Tundras) or a VVTi version (introduced around 2005). Common Key Pin Identifiers

Before you touch a single wire, you must identify which generation of 2UZ you own. Toyota changed the game in 2005 (2005.5 for Tundra; 2006 for Land Cruiser). 2uzfe ecu pinout

Constant 12V power direct from the battery fuse link to maintain ECU memory (DTC storage and fuel trims).

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The 2UZ-FE ECU (Engine Control Module) typically uses three or four large rectangular connectors, usually labeled (or A, B, C, D depending on the service manual). For common applications like the 2004–2006 Toyota Tundra

Largest plug, usually grey/black.

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

This is the lifeline. Pins A1–A4 are dedicated Engine Ground . Do not combine these. Run each directly to the cylinder head. Late VVTi (2005–2011) The 2UZ-FE ECU pinout varies

| Pin | Wire Color | Signal | Function | | :--- | :--- | :--- | :--- | | B1 | Screen Shield | E2 | Shield Ground for MAF | | B2 | Red-Blue | VCC | MAF Sensor Power (5V output) | | B3 | Blue-Red | VG | MAF Sensor Signal (Voltage) | | B4 | Black | ETHW | Engine Coolant Temp (Thermistor) | | B5 | Red-White | THA | Intake Air Temp Sensor | | B6 | Brown | VTA1 | Throttle Position Sensor (Main) | | B7 | Light Green | OX1L | Oxygen Sensor 1 (Left Bank) | | B8 | White | KNK1 | Knock Sensor 1 (Left) | | B9 | Black | E2 | Sensor Ground (Return) | | B10 | Vacant | - | - | | B11 | Red | VTA2 | Throttle Position Sensor (Sub for ETCS) | | B12 | Light Blue | VTT | Throttle Motor Feedback | | B13 | White-Red | OX2L | Oxygen Sensor 2 (Left, after cat) | | B14 | Light Green-Black | OX1R | Oxygen Sensor 1 (Right Bank) | | B15 | Pink | KNK2 | Knock Sensor 2 (Right) | | B16 | Yellow-Black | OX2R | Oxygen Sensor 2 (Right, after cat) | | B17 | Blue | EVP | EVAP Pressure Sensor | | B18 | Yellow | EGR | EGR Gas Temp Sensor | | B19 | Blue-Red | SPD | Vehicle Speed Sensor Input | | B20 | Purple | NSW | Neutral Start Switch (Park/Neutral) | | B21 | Red-Black | / | A/C Compressor Lock Signal | | B22 | Vacant | - | - |

Verify NE+ and NE- signals. These are sensitive to polarity and shielded to prevent interference.