| Pin # | Signal Name | Signal Description | | --- | --- | --- | | 1 | VCC | Battery voltage supply | | 2 | IGF | Ignition feedback signal | | 3 | IG | Ignition switch signal | | ... | ... | ... | | 15 | injector #1 | Fuel injector control signal (cylinder 1) | | 16 | injector #2 | Fuel injector control signal (cylinder 2) | | ... | ... | ... | | 25 | TPS | Throttle position sensor signal | | 26 | MAP | Manifold absolute pressure sensor signal | | ... | ... | ... |
Introduction of more aggressive immobilizer systems and updated pin configurations to control the electronic throttle motor. Generation 3: VVTi with Advanced ETCS-i (2005–2009)
Obtaining accurate 2UZ-FE ECU pinout information is crucial for successful tuning and modification. Sources for this information include: 2uzfe ecu pinout
The 2UZ-FE uses multiple oxygen sensors (Upstream A/F sensors and downstream O2 sensors). Mixing up the heater circuit pins ( HT1A, HT2A ) with the signal circuit pins ( OX1A, OX2A ) will cause immediate Check Engine lights and poor fuel economy. 5. Where to Find Exact Diagrams
Ignition switch signal that tells the ECU the key is turned to "ON". | Pin # | Signal Name | Signal
Leaving the Neutral Start Switch pin ungrounded on a manual swap will cause the ECU to think the vehicle is in gear. Result: No injector pulse during cranking.
Constant 12V power from the battery (maintains ECU memory and trouble codes). | | 15 | injector #1 | Fuel
Constant 12V battery power used to maintain the active volatile memory (Keep Alive Memory) for diagnostic trouble codes (DTCs).
| 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 | - | - |
Use a multimeter to test for continuity from the sensors (like the oxygen sensors) to the ECU pins.
The is a complex but decipherable map. If you are performing a repair, focus on the power, ground, and sensor circuits first. If you are swapping the engine into a classic 4x4, stick to the pre-VVT-i version (1998-2004) for simplicity, as it runs on a cable throttle and requires fewer chassis inputs.