Nissan Zexel Ecu Pinout

For those looking to reflash or read the ECU data, specific "boot pins" and communication lines must be identified:

The Zexel ECU derives tach signal from the crank sensor (A11). If your tach is dead but the engine runs, Pin B3 (Gray/Red) is likely open circuit or the internal transistor is dead. nissan zexel ecu pinout