Typically a magnetic pickup or Hall-effect sensor providing engine RPM.
Zexel ECUs are commonly found in legacy Nissan diesel platforms—such as the and Terrano II
While pin locations vary across specific vehicle models (such as the Nissan Patrol, Terrano, or Caravan), Zexel architectures universally categorize their pins into five primary functional blocks. 1. Power Supply and Ground Circuitry
For those looking to increase power, "piggyback" modules often intercept the TPS and Fuel Quantity pins. By modifying these signals, the ECU is tricked into holding the fuel rack open longer, increasing torque. Always ensure your EGT (Exhaust Gas Temp) is monitored when modifying Zexel pinout signals. Pin Function Typical Wire Color Expected Signal Main Relay Black/White Pump Actuator Red/Yellow PWM (Duty Cycle) RPM Signal AC Sine Wave Diagnostic (K-Line) Digital Data nissan zexel ecu pinout work
Swap these two signals by accident, and the engine will sound like it's running on 2 cylinders with massive backfires.
Conclusion (actionable takeaways)
Probing should always be done via the wire side of the connector (backprobing) while it is still attached, avoiding widening the female pin receptacles. Typically a magnetic pickup or Hall-effect sensor providing
This guide will turn that confusion into a systematic process.
: No check engine light; no communication; vehicle completely dead.
The connection between the ECU and the Zexel injection pump is the most complex part of the harness. It generally includes: Power Supply and Ground Circuitry For those looking
Function groups and wiring conventions
Working with automotive electronics requires caution to prevent permanent hardware failure: