The Toyota 1KZ engine family—specifically the 1KZ-TE—is a legend in the overlanding and diesel 4x4 community. Found in iconic vehicles like the Toyota Hilux Surf, Land Cruiser Prado (90 & 95 series), and the Hiace van, this 3.0-liter turbo-diesel electronic indirect injection engine is beloved for its reliability and torque.
For detailed visual guides, specialized forums and technical repositories provide high-resolution schematics: 1KZ-TE ECU Pinout and Wiring Guide | PDF 1 ktze pinin pinout | PDF Slideshare 1kz ecu pinout
Successful engine operation depends on several primary signals routed through the ECU: Fuel Management Spill Control Valve (SPV) Timer Control Valve (TCV) The Complete Guide to the 1KZ ECU Pinout:
| Pin | Wire Color | Signal | Description | |-----|------------|--------|--------------| | B1 | B-W | M-REL | Main relay control (ECU triggers relay) | | B2 | L | FAN | Radiator fan relay control | | B3 | G-R | EGR | EGR vacuum switching valve (VSV) | | B4 | R | VSV1 | Fuel pressure VSV (spill control valve) | | B5 | B-Y | VCV | Spill control valve (fuel pump) | | B6 | L-R | TCV | Timing control valve (injection timing) | | B7 | Y | EDU | Injector driver ground (to EDU – early models) | | B8 | W | EDU+ | Injector driver power (to EDU) | | B9 | B-O | ELS | Electrical load signal (from alternator) | | B10 | G | SPD | Vehicle speed sensor (from combination meter) | | B11 | W-B | W | Check engine light (warning lamp) | | B12 | R-B | TACH | Tachometer output | | B13 | G-B | FPR | Fuel pump relay (lift pump – some models) | | B14 | L-B | STP | Stop light switch (brake input) | | B15 | R-W | +BM | Backup power for ECU memory (constant +12V) | | B16 | B | E01 | Power ground (injector driver) | and the Hiace van
(Plug 1 - Injection System) | Pin | Name | Description | Wire Color (Typical) | | :--- | :--- | :--- | :--- | | 1 | IGSW | Ignition Power | Black/White | | 3 | E01 | Engine Ground | Brown | | 5 | #10 | Injector 1 | Red | | 6 | #20 | Injector 2 | White | | 7 | #30 | Injector 3 | Green | | 8 | #40 | Injector 4 | Blue | | 9 | E1 | Sensor Ground | Brown | | 10 | +B | Battery Power | Black/Orange | | 12 | STA | Starter Signal | Black/White |
STA (Starter Signal): Tells the ECU the engine is cranking so it can provide extra fuel for startup.