| Pin | Function | | :--- | :--- | | | Power (ECCS relay) | | 16, 48, 60, 71 | Ground | | 22 | Ignition trigger (CAS) |
Prevents electromagnetic interference (EMI) from disrupting the weak alternating current (AC) or square-wave signals.
Regulated voltage supplied by the ECU to power the potentiometers. 4. Actuator Output Pinouts (Engine Control)
The Nissan Zexel Engine Control Unit (ECU) is commonly found in diesel models like the and nissan zexel ecu pinout
Zexel ECUs are predominantly found in Nissan’s robust commercial and off-road diesel lineups.
Used to adjust cold-start glow plug duration and fuel enrichment blocks.
Modifies cold-start fueling and glow plug duration. | Pin | Function | | :--- |
Set your multimeter to . Ground the black probe to the chassis.
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Understanding the is essential for technicians, diesel enthusiasts, and DIYers dealing with older, high-pressure diesel Nissan vehicles, particularly those equipped with the ZD30, TD27Ti, or QD32ETi engines . Zexel, a company heavily affiliated with Bosch and Diesel Kiki, produced the Electronic Diesel Control (EDC) systems used in many Nissan diesel vehicles throughout the late 1990s and early 2000s, including the Nissan Patrol, Navara, and Terrano. Actuator Output Pinouts (Engine Control) The Nissan Zexel
Do not wire the ECU directly to the ignition switch. Use a standard 4-pin automotive relay:
Below is a conceptual representation of critical pins frequently found on these legacy Zexel control units: Pin Category Common Function Typical Wire Color Guide (Nissan Standard) Ignition Switch ON Black / Red Stripe Power Battery Backup (Constant) Red / Blue Stripe Ground Engine Control Ground Black or Black / Pink Stripe Input Crankshaft Position (RPM) White (Shielded coaxial) Input Water Temp Sensor Blue / Orange Stripe Input Control Sleeve Position (Pump Feedback) Green / White Stripe Output Timing Control Valve Yellow / Black Stripe Output Glow Plug Relay Control Electronic Ground Pulse
Inside the engine bay near the battery (common in commercial vans/trucks). 2. Read the Label Look for a metal case with a sticker containing: The (e.g., 23710-XXXXX ). The Zexel Part Number (e.g., 40791X-XXXX ). The Bosch cross-reference number (if applicable). Standard Architecture of a Zexel ECU Pinout
