Nissan Zexel Ecu Pinout !new!

The Nissan Zexel ECU controls fuel injection, timing, and emissions in many classic Nissan diesel and gasoline vehicles from the 1990s and early 2000s. Zexel, formerly known as Diesel Kiki and later absorbed by Bosch, manufactured these Engine Control Units to manage specialized electronic injection systems like the Bosch VE-EDC inline and rotary pumps.

Synchronizes communication timing between devices.

Heavy-gauge ground path for high-current actuators (solenoids, heaters). Black/White 0V (Resistance < 0.2Ω) 3. Sensor Input Pinouts (Data Gathering) nissan zexel ecu pinout

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

Set your DMM to DC Voltage or Resistance. Never use a traditional incandescent test light on ECU wires, as they can draw too much current and burn out sensitive microchips. The Nissan Zexel ECU controls fuel injection, timing,

| Pin # | Signal Name | Description | | --- | --- | --- | | 1-8 | Analog Inputs | Oxygen sensor, airflow meter, and fuel pressure sensor | | 9-16 | Digital Inputs | Vehicle speed sensor, brake switch, and clutch switch | | 17-24 | Output Drivers | Fuel pump, radiator fan, and AC compressor | | 25-32 | Injector Outputs | Fuel injector control for cylinders 1-6 |

The Ultimate Nissan Zexel ECU Pinout Guide: Wiring, Diagnostics, and Tuning Read the Label Look for a metal case

Need a specific pinout for your model? Leave your ECU part number and engine code in the comments below, or consult your regional Nissan dealer’s archived service bulletins.

| Pin No. | Function | Description | Wire Color (Typ) | | :--- | :--- | :--- | :--- | | | Battery Positive (+12V) | Main power supply (Unswitched). | Red / Red-White | | 2 | Ground (GND) | ECU Main Ground (Chassis). | Black / Black-White | | 3 | Ignition Switch (IG) | +12V when key is ON. Powers the ECU logic. | Blue-Red | | 4 | Ground (Sensor) | Signal ground for analog sensors. | Green-White | | 51 | Battery Backup (+12V) | Keeps KAM (Keep Alive Memory) alive. | Red-Blue |

: Always disconnect the negative battery terminal before unplugging or plugging in the Zexel ECU.