| Pin # | Function | Description | | :--- | :--- | :--- | | | Pump Solenoid (-) | Drives the fuel quantity control valve. | | 11 | Pump Solenoid (+) | Power feed to the pump solenoid (often battery voltage switched). | | 12 | Timing Solenoid (-) | Drives the timing advance valve. | | 13 | Timing Solenoid (+) | Power feed to the timing solenoid. | | 14 | Pump Position Sensor + | Input from pump internal sensor (cog wheel). | | 15 | Pump Position Sensor - | Ground/Signal return. |
🛠️ Many Zexel ECUs suffer from "dry" solder joints on the main power pins due to vibration and heat cycles. If your engine cuts out intermittently, reflowing the solder on the internal PCB pins often solves the problem. nissan zexel ecu pinout work
One tuner reported that after making a stage 1 modification to a Nissan Patrol Zexel ECU (part number 478227), they needed checksum recalculation before the modified firmware could be written successfully. | Pin # | Function | Description |
Match the wire colors to the diagram to double-check you have the correct pin. | | 13 | Timing Solenoid (+) |
Before diving into pinouts and work procedures, it's crucial to understand what the Zexel ECU is and its role in Nissan vehicles. Zexel was a Japanese manufacturer that operated under license from Bosch, particularly for the production of VE and VP44 rotary injection pumps. Therefore, a Nissan with a Zexel ECU almost exclusively uses a VP44 injection pump.