1kz Ecu Pinout [verified] Jun 2026

A traditional throttle cable runs from your pedal to the throttle body. A Throttle Position Sensor (TPS) tells the ECU the cable angle.

The Toyota (3.0L Turbo Diesel) ECU pinout is critical for engine swaps and diagnostics, but it varies slightly depending on whether your engine is from an early (e.g., KZN130 Hilux Surf) or later model (e.g., Hilux Tiger or KZN165) Standard 1KZ-TE ECU Pinout Reference

Check for +12V at the Spill Valve body. If power is present, probe the SPV pin at the ECU during cranking using an oscilloscope or test light to see if the ECU is actively pulsing the ground circuit. If there is no pulse, verify that the NE+ and NE- speed sensors are producing an AC voltage pulse during cranking. 1kz ecu pinout

The 1KZ-TE is a 3.0L, 4-cylinder, SOHC turbo-diesel engine with electronically controlled injection. This system offers more precise fuel delivery and better cold-start performance than its mechanical predecessor, the 1KZ-T.

Ultimate 1KZ-TE ECU Pinout Guide: Wiring Diagrams & Electrical Troubleshooting A traditional throttle cable runs from your pedal

Often utilizes a 4-plug layout or a different pin density to accommodate advanced emissions and intercooling.

The 1KZ-TE uses electronic control for injection timing and duration. The ECU sends a voltage signal to the motor on the injection pump. If power is present, probe the SPV pin

Check the E2 sensor ground. If this ground is "noisy" or loose, all sensor readings will fluctuate. Conclusion

Here’s a draft technical write-up for the (commonly for Toyota 1KZ-TE diesel engine, often found in HiLux, Prado, Hiace, etc.):

The 1KZ-TE ECU is robust, but the wiring harnesses are now aging. Most issues stem from broken wires at the injectors, corroded ground pins (14/15), or battery voltage leaks at Pin 16. If you are performing a conversion, identifying the presence of an immobilizer system is your first and most critical step. Always cross-reference the specific part number on your ECU case (e.g., 89661-xxxxx) with the Toyota factory wiring diagram for your specific chassis code.

: Various ground points for the computer and sensors. Engine Sensors : NE+ / NE- : Engine revolution (Crank) sensor signals. TDC+ : Top Dead Center position sensor. THW : Engine coolant temperature sensor. THA : Intake air temperature sensor. PIM : Turbo pressure sensor (Manifold Absolute Pressure). Fuel & Actuators : SPV : Spill Valve control for fuel injection volume. TCV : Timer Control Valve for injection timing. STA : Starter signal. Diagnostic Standards