You need to connect to your vehicle’s harness:
(Crank Position) signals allow the ECU to calculate the exact moment to inject fuel. Correction Resistors
These are the crank and revolution signals. Without these inputs (Pins
The light will flash a series of long and short blinks indicating two-digit codes. For example, a flash of one long blink followed by a short blink indicates code "11". If there are no faults stored, the Check Engine light will flash continuously (on for ¼ second, off for ¼ second). Once you have written down the codes, turn off the ignition and remove the jumper wire. To clear the codes, remove the (found in the engine bay fuse box) for 60 seconds.
The 1KZ-TE tach signal is a 0-12V square wave, but some old tachometers (diesel mechanical) expect a different waveform. Install a tachometer adapter (e.g., Dakota Digital SGI-8) or add a 1k ohm pull-up resistor between C3 and A1. 1kz ecu pinout
Ground pins. E1 is the main chassis ground, E2 is the dedicated sensor ground shield, and E01/E02 handle heavy current switching grounds. Injection Control (The Core System)
Most 1KZ-TE ECUs utilize two or three primary connectors (plugs) usually labeled #1, #2, and sometimes #3.
What vehicle is the engine currently sitting in?
Constant 12V power used to maintain the ECU’s memory and fault codes. You need to connect to your vehicle’s harness:
Without the matching immobilizer ECU and transponder key, the ECU will pulse the injectors for 1 second, then cut off. You cannot bypass this with a resistor—you must have the matched set.
Engine Coolant Temperature (ECT) sensor input. Vital for cold-start glow plug duration and fuel enrichment.
Note: Wire colors vary by vehicle year and factory origin (JDM vs. Australian vs. European delivery). Always verify with a digital multimeter. Connector A (26-Pin) Pin Number Injector / Spill Control Ground Path 1 Injector / Spill Control Ground Path 2 Power Ground Power Ground EFI Relay 12V Power EFI Relay 12V Power Connector B (16-Pin) Pin Number Constant 12V Battery Ignition Switch Signal Spill Control Valve Signal Timing Control Valve Signal Engine/Chassis Ground Connector C (22-Pin) Pin Number 5V Sensor Power Supply Throttle Position Signal Turbo Boost Sensor Signal Coolant Temperature Signal Intake Air Temperature Signal Engine Speed Sensor (+) Engine Speed Sensor (-) Sensor Ground (Isolated) 1KZ-TE Engine Swap Wiring: Minimal to Run
I can then provide the exact diagram or wire colors for your specific setup. For example, a flash of one long blink
This is the heart of the fuel system. If the ECU doesn't send a signal to this pin, the engine will not start. It is often paired with a Spill Valve Relay (SVR) TDC and NE Signals:
Print the 3-plug pinout table from this article and laminate it. Keep it in your glove box if you drive a 1KZ-equipped vehicle. When you are broken down on a trail with no crank signal, that laminated sheet is worth more than any scan tool.
Are you troubleshooting an or doing an engine swap ?
This article provides the definitive technical deep dive into the 1KZ-TE ECU pinout, covering its history, connector types, signal functions, and troubleshooting tips.
For detailed wiring schematics, you can refer to the KZN130 1KZ-TE Terminal Configuration or the 1KZ-TE Installation Instructions for performance tuning. or ? 1KZ-TE ECU Wiring Installation Guide | PDF - Scribd