Pinout - 1kz Ecu

This ECU has 4 connectors:
A (24-pin), B (22-pin), C (22-pin), D (16-pin – OBD-II diagnostic port, not always fully pinned).

Posted by: Admin / Local Expert Subject: 1KZ-TE ECU Pinout Diagrams, Pin Identification, and Wiring Tips

Hey everyone,

Since the 1KZ-TE is one of the most popular diesel swap engines for Toyotas (Hilux, Surf, 4Runner, Prado), questions about the ECU pinout come up constantly. Whether you are wiring in a standalone harness or troubleshooting a no-start condition, having the correct pinout is critical.

Below is the breakdown of the standard 1KZ-TE ECU pinout (found in models like the KZN130, KZN185, and KZJ90/95). 1kz ecu pinout

When diagnosing or swapping a 1KZ-TE, certain pins are your “canary in the coal mine.”

This is the most common failure point.

| 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 |

| Pin | Signal | Notes | |-----|--------|-------| | B1 | #10 (Injector 1) | To spill control valve? No – wait: 1KZ-TE has no unit injectors – it has a rotary pump with electronic spill valve | | B2 | #20 (Injector 2) | Not used – correction: 1KZ-TE uses spill valve control from pump | | Actually – Key signals on B: | | | B6 | PCV (EGR vacuum control) | | | B7 | VSV (Fuel pressure up – cold start) | | | B8 | RSC (Rotational speed control – spill valve) | Main fuel quantity control | | B9 | TCV (Timing control valve) | Injection timing | | B10 | FSV (Fuel shutoff valve) | Stop solenoid | | B12 | IACV (Idle air control) | Stepper motor | This ECU has 4 connectors : A (24-pin),

Correction for injectors: The 1KZ-TE uses an electronic distributor-type injection pump (Denso) – no high-pressure injector drivers in ECU. The pump has a spill valve (RSC) and timing valve (TCV).