Below are the critical pins found on the most common 26-pin + 16-pin + 22-pin configurations (found in later model Prados/Surfs). | Pin Number | Circuit Description | Notes | | :--- | :--- | :--- | | 1 | 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 | Connector #2 (16 Pins) - Inputs and Communication | Pin Number | Circuit Description | Notes | | :--- | :--- | :--- | | 1 | NE+ (RPM Signal) | Crankshaft Position Sensor (+) | | 2 | NE- (RPM Signal) | Crankshaft Position Sensor (-) | | 4 | PIM (Boost Pressure) | Turbo Pressure Sensor Signal | | 9 | IDL (Idle Switch) | Signal from Throttle Position Sensor (TPS) | | 10 | PSW (Throttle Switch) | Throttle Position Signal | | 15 | W (Warning Lamp) | Check Engine Light Output | | 16 | E1 (Sensor Ground) | Sensor Ground Return | Connector #3 (22 Pins) - Transmission & Control Found mostly on Automatic models. Rat Bangbuscom Bangbros 1 - Stephanie Mall
The Toyota 1KZ-TE engine is a legendary 3.0-liter turbo-diesel powerplant found in vehicles like the Hilux, Hiace, Land Cruiser Prado, and 4Runner. Whether you are diagnosing a no-start condition, wiring an engine swap (conversion), or troubleshooting an immobilizer issue, understanding the Engine Control Unit (ECU) pinout is essential. The Man Who Knew Infinity Index ✅