Nissan Zexel Ecu Pinout Exclusive Jun 2026

Never disconnect the battery cable while the engine is running. Always turn the ignition OFF and disconnect the negative battery terminal before unplugging the ECM to prevent voltage spikes from damaging the unit.

The following diagrams illustrate common Nissan ECU connector layouts and internal circuit board layouts for Zexel units: Key Technical Considerations nissan zexel ecu pinout

If you are deep into the world of classic Nissan diesel performance, engine swaps, or troubleshooting a stubborn electrical fault, you have likely encountered the name . For decades, Zexel (a Japanese fuel injection specialist, now part of Bosch) supplied Electronic Control Units (ECUs) for Nissan’s legendary diesel engines, most notably the TD42 , RD28 , and QD32 . Never disconnect the battery cable while the engine

You don’t always need a full pinout to verify ECU health. Here is a quick 5-step check: For decades, Zexel (a Japanese fuel injection specialist,

| Pin # | Signal Name | Description | | --- | --- | --- | | 1 | DIAG | Diagnostic connector | | 2 | CANH | CAN bus high | | 3 | CANL | CAN bus low | | 4 | K-LINE | Communication line | | 5 | L-Line | Communication line | | 6 | VCC | Power supply | | 7 | GND | Ground | | 8 | N/C | Not connected | | 9 | N/C | Not connected | | 10 | GND | Ground |

| Pin | Wire Color | Function | Voltage / Signal | | :--- | :--- | :--- | :--- | | A1 | Black/Yellow | Main ECU Ground | 0V (Chassis) | | A2 | Red/Black | Battery Backup (+12V constant) | 11-14V | | A3 | White/Red | Ignition Switch (+12V switched) | 11-14V (Key ON) | | A4 | Yellow/Green | Fuel Cut Solenoid (Spill Control) | +12V to open | | A5 | Green/White | Timing Control Valve (TCV) | PWM signal (0-5V avg) | | A6 | Black/White | Sensor Ground (common) | 0V | | A7 | Light Green | Coolant Temp Sensor (ECT) | 0.5-4.5V (varies) | | A8 | Blue/Red | Intake Air Temp (IAT) sensor | 0.5-4.5V | | A9 | Yellow/Blue | Boost Pressure Sensor (Signal) | 0.5-4.5V (1-2bar) | | A10 | Brown/White | TPS (Throttle Position) Signal | 0.5-4.8V idle to WOT | | A11 | White/Black | Crank Position Sensor (NE signal) | AC sine wave (0.5-5V) | | A12 | Not used | - | - | (Pins A13-A24 continue similarly, with injector timing feedback and vehicle speed sensor)

: Critical for cold starts and fuel mapping.