Nissan: Zexel Ecu Pinout
Shared sensor reference ground loop (isolated from dirty chassis ground). Accelerator Pedal Position (APP) Sensor
A safety valve that cuts off fuel delivery completely when the ignition is switched off. Auxiliary Control Outputs
Critical for engine timing and RPM calculation. nissan zexel ecu pinout
The Zexel injection pump relies on a closed-loop feedback mechanism to meter fuel.
You don’t always need a full pinout to verify ECU health. Here is a quick 5-step check: Shared sensor reference ground loop (isolated from dirty
| Pin | Wire Color | Function | Notes | | :--- | :--- | :--- | :--- | | B1 | Black | Power Ground | Heavy gauge – to engine block | | B2 | White | Alternator L-terminal | Charge lamp control | | B3 | Gray/Red | Tachometer Output | 0-12V square wave | | B4 | Blue/Yellow | Glow Plug Relay Control | Activates pre-heat | | B5 | Green/Red | EGR Solenoid (if equipped) | PWM duty cycle | | B6 | Black/Yellow | Stop Lamp Switch input | Fuel cut on decel | | B7 | Orange | Check Engine Lamp (MIL) | Switched ground | | B8 | Purple | Diagnostic Request (K-Line) | ISO 9141 (5V idle) | | B9 | Pink | Accelerator Pedal Position (APP) secondary | For automatic trans | | B10 - B24 | Various | Injector timing feedback, neutral switch, A/C cut | Consult specific diagram |
Manages exhaust gas recirculation for emissions. The Zexel injection pump relies on a closed-loop
) . Test the remaining unpowered pins against the chassis ground to locate all . Safety Precautions and Best Practices
Pinout diagrams allow you to test sensor voltages directly at the ECU plug using a multimeter.
Working on an automotive ECU requires strict adherence to safety protocols to avoid frying internal microprocessors.
The Zexel pump uses an electronic actuator (Governor) to slide the control collar inside the injection pump, regulating fuel volume. Pin Number Description Fuel Cutoff Solenoid Shuts off fuel completely when the ignition turns off Pin 6 Injection Timing Control Valve Adjusts advance/retard solenoid at the bottom of the pump Pin 12 Control Sleeve Position Sensor (Feedback) Tells the ECU the exact position of the fuel collar Pin 13 Control Sleeve Position Sensor (Reference) 5V reference signal for the feedback sensor Pin 41 Electric Governor Actuator (+) High-amperage power to move the fuel control collar Pin 42 Electric Governor Actuator (-) Ground return control for fuel collar movement 3. Critical Engine Sensors