1kz Ecu Pinout |best| ✦ High Speed

Let’s apply the pinout. Your Land Cruiser Prado cranks but doesn’t start. Follow this logical flow:

Controls the advance and retard mechanism inside the pump by altering internal fuel pressure.

Manages the electronic spill control valve and pump sensors. 1kz ecu pinout

Controls the fuel quantity injected into the cylinders. TCV (Timer Control Valve): Adjusts injection timing. S-REL: Glow plug relay control. W: Check Engine Light (MIL) output. Variations Between Models

Toyota 1KZ-TE is a 3.0L inline-4 turbocharged diesel engine widely used in vehicles like the Hilux Surf, Land Cruiser Prado, and HiAce. Understanding its ECU (Electronic Control Unit) pinout is critical for engine swaps, performance tuning, and troubleshooting sensor issues. 1KZ-TE ECU Pinout Overview Let’s apply the pinout

Automatic transmission shift control pins (for models running integrated Engine/A343F Transmission ECUs). Standard 1KZ-TE 3-Plug ECU Pinout Map (Reference)

| Pin Number | Circuit Description | Notes | | :--- | :--- | :--- | | | Injector #1 | Output to No. 1 Cylinder Injector | | 2 | Injector #2 | Output to No. 2 Cylinder Injector | | 3 | Injector #3 | Output to No. 3 Cylinder Injector | | 4 | Injector #4 | Output to No. 4 Cylinder Injector | | 14 | Earth (Ground) | Critical – ECU Ground (to body/engine) | | 15 | Earth (Ground) | Critical – ECU Ground (to body/engine) | | 16 | +B (Battery Power) | Constant 12V from Battery (usually via EFI fuse) | | 17 | EFI Main Relay | Switches power to the relay coil | | 22 | SPD (Speed Signal) | Input from Vehicle Speed Sensor | | 24 | THW (Water Temp) | Engine Coolant Temperature Signal | | 26 | THA (Intake Temp) | Intake Air Temperature Signal | Manages the electronic spill control valve and pump sensors

: This code indicates that the voltage signal from the turbo pressure sensor (PIM) is out of the expected range (usually below 0.2V or above 4.8V). Common causes include a cracked vacuum hose leading to the sensor, a faulty sensor, or a broken signal wire between the sensor and the ECU.

Check the Glow Plug Relay trigger pin and the THW sensor resistance.

A common upgrade is a Unichip piggyback ECU. It taps into the stock wiring harness to modify fuel, boost, and timing signals, allowing significant power gains while maintaining factory ECU control.