Nissan vehicles of the 1990s relied on Engine Control Units manufactured primarily by two suppliers: Hitachi and Zexel (often branded as Zexel or Bosch). While functionally similar, Zexel ECUs often differ in pinout assignment, board layout, and internal architecture compared to their Hitachi counterparts.
| Pin # | Function | Description | | :--- | :--- | :--- | | | CHECK ENG Lamp | Grounds the bulb to illuminate the light. | | 41 | Diag/K-Line | Serial data for Consult/Nissan Scan Tool. | | ** nissan zexel ecu pinout work
: Integrated pins for the NATS anti-theft system and immobilizer bypass. Nissan Terrano 2.7 TDI Zexel ECU model 407913-120 is standard for this vehicle. auto24parts Nissan vehicles of the 1990s relied on Engine
Common variations and gotchas
Part Number Reference: JECS A18-700 / 23710-60P00 | | 41 | Diag/K-Line | Serial data
Find a Black/White wire (pin 23 or 103 typically). That is sensor ground. Attach your multimeter black lead there. Then probe other pins with positive lead. Any pin showing 5V or 12V relative to sensor ground is a power supply. Any pin showing continuity to chassis ground (with key off) is likely an actuator return.