Nabigazioa
: Many versions use a 14-pin plug where, for example, Pin 9 and Pin 2 relate to power supply for the distributor . Visual Reference Technical Notes for Repairs
| Pin Number | Function | Description | | :--- | :--- | :--- | | | Injector A | Injector Channel 1 (Cylinders 1 & 4 usually) | | 2 | Injector B | Injector Channel 2 (Cylinders 2 & 3 usually) | | 3 | Ignition A | ignition driver for Coil 1 (5v logic or 12v sink) | | 4 | Ignition B | Ignition driver for Coil 2 | | 5 | Idle Air Control (IAC) | Idle Speed Control output | | 6 | Tachometer Out | 12v square wave output for dashboard RPM | | 7 | Fuel Pump Relay | Ground output to trigger fuel pump relay | | 8 | Fan Relay | Ground output to trigger radiator fan | | 9 | Spare Output | User programmable (e.g., Nitrous, Boost Control) | | 10-14 | Spare ADC | Analog inputs (0-5v) for sensors | | 15 | Ground (Sensor) | Ground return for TPS, CLT, IAT | | 16 | Ground (Power) | Main ECU Ground (Connect
If your unit has a large, square plastic connector with three rows of pins, it is a Motronic-style connector. This is common for European applications or specific Japanese conversions. The pins are identified by a number grid (1–55) printed on the plastic housing. dupec ecu pinout
Do not probe pins randomly. A test light connected to battery positive can short sensitive 5V sensor returns. Use a multimeter and a back-probe kit.
But without a proper , troubleshooting becomes guesswork. This article provides a comprehensive, pin-by-pin breakdown of the 154-pin connector, explaining each signal’s function, voltage ranges, and common failure points. : Many versions use a 14-pin plug where,
: Due to their identical pinouts, Dupec units can often be replaced directly with a Bosch Motronic ECU from similar model years .
Before diving into the wiring diagrams, it is essential to understand the hardware you are working with. The pins are identified by a number grid
I purchased the Dupec ECU pinout expecting a reliable, verified reference for repinning a standalone ECU into a factory harness. Unfortunately, I found several discrepancies when cross-referencing with a factory service manual and a multimeter.
If you need to power the ECU outside the vehicle (for cloning or repair):