1kz Ecu | Pinout

Check pin A18 (EDU) or C11 (FC) . If the fuel cut solenoid loses ground through the ECU, the engine dies. On many swaps, people bypass this by wiring the fuel cut solenoid directly to the ignition switch (12V), but this prevents the ECU from cutting fuel for anti-run-on. It’s safer to let the ECU control it.

: Early 1KZ units (like the KZN130) may lack certain pins found on later KZN185/KZN165 models, such as immobilizer signals (Code 99) or EGR valve lift sensors (Code 96). Transmission Type

Pins like +B , +B1 , and E1/E01 for main battery power and grounding.

Comprehensive Guide to Toyota 1KZ-TE ECU Pinout The Toyota 1KZ-TE engine is a legendary 3.0-liter turbo diesel powerhouse, known for its reliability and longevity, commonly found in Toyota Hilux, Land Cruiser Prado, and Hiace vehicles from the mid-1990s to early 2000s. Understanding the is essential for enthusiasts, mechanics, and technicians involved in engine swaps, troubleshooting, or upgrading to standalone engine management systems. 1kz ecu pinout

Wire the (Check Engine Light) pin to a small 12V bulb on your dash. Tie the other side of the bulb to switched 12V power.

The ECU cycles this pin to ground at ultra-high speeds to control fuel volume. A shorted SPV circuit can cause a runaway engine or immediate stalling.

Unlike its mechanical predecessor, the 1KZ-T, the 1KZ-TE relies on an Electronic Control Unit (ECU) to manage fuel injection timing, spill valve control, and turbo boost. When swapping this engine into another chassis or diagnosing a running issue, understanding the ECU pinout is critical. Check pin A18 (EDU) or C11 (FC)

The acts as the brain for the 1KZ-TE, managing fuel injection timing via the Electronic Spill Valve (SPV) and monitoring engine vitals through various sensors. Because the 1KZ-TE was produced over several years (most notably from 1993 to the early 2000s), there are distinct variations between "Early Model" (3-pole/plug) and "Late Model" (4-pole/plug) ECU configurations. Primary Pinout Groups & Terminals

Accessing the ECU's memory for fault codes is often the fastest way to diagnose a wiring or sensor issue. You do not always need a high-end scanner to talk to the 1KZ-TE. The vehicle is equipped with a (Data Link Connector 3), often located under the fuse box on the driver's side of the dash.

These pins receive signals from the crankshaft and camshaft position sensors to synchronize injection timing. PIM (Pressure Intake Manifold): It’s safer to let the ECU control it

: Main power supply from the EFI relay when the ignition is ON. E01 / E02 (C-13, C-26) : Primary computer grounds. Sensor Inputs NE+ / NE- (C-4, C-17) : Engine revolution signal from the engine speed sensor. TDC+ / TDC- (C-5, C-18) : Top Dead Center (crank position) signal.

| Pin | Wire Color | Signal Name | Function | Voltage / Signal | | :--- | :--- | :--- | :--- | :--- | | | Light Green/Yellow | GLOW | Glow Plug Control Relay | 12V (Activates relay) | | C2 | Green/Black | EGR | EGR Vacuum Switching Valve (VSV) | 12V (Solenoid on) | | C3 | Yellow/Black | TACH | Tachometer Output (RPM signal) | Pulse (7V average at idle) | | C4 | Pink | W | Check Engine Light (CEL/MIL) | 0V (Off) / 12V (On) | | C5 | White/Black | TC | Diagnostic Port – TC (Data Link) | 5V (Pull-up) | | C6 | Violet | TE1 | Diagnostic Port – TE1 (Service mode) | 0V (Normal) / 5V (Diag) | | C7 | N/A | N/C | Not Connected | - | | C8 | Black/White | E1 | Digital Ground | 0V | | C9 | N/A | N/C | Not Connected | - | | C10 | N/A | N/C | Not Connected | - | | C11 | Red/Black | FC | Fuel Cut Solenoid (EDU alternative) | 12V (Run) | | C12 | Blue | A/T | Automatic Transmission Lock-up solenoid | 12V (Locked) | | C13 | N/A | N/C | Not Connected | - | | C14 | N/A | N/C | Not Connected | - | | C15 | N/A | N/C | Not Connected | - | | C16 | Green/Orange | OD1 | Overdrive Switch Signal | 0V (OD Off) / 12V (OD On) | | C17 | N/A | N/C | Not Connected | - | | C18 | N/A | N/C | Not Connected | - | | C19 | Red/White | +BM | Backup Power for Diagnostic memory | 12V (Constant) | | C20 | White/Black | SIL | Serial Communication (OBD / Lexus tester) | Data stream (0-12V) | | C21 | N/A | N/C | Not Connected | - | | C22 | Pink/Black | A/T2 | Automatic Transmission – Pattern select | 0V (Power) / 12V (Comfort) |