Are you planning to perform a or troubleshooting a specific sensor error on this ECU? IAW 48P2 ECU Modification Guide | PDF | Business - Scribd
Always disconnect the battery negative terminal before probing the ECU connector. Never back-probe a sealed connector with a steel needle; use proper breakout leads.
No spark and no fuel? Check for 3V AC at Pins 34/35 during cranking. If absent, suspect the crank sensor (commonly located near flywheel on Fiat 1.8 16V engines). iaw 48p2 pinout
This ECU supports various engine sizes across the PSA group, including:
However, finding a clear, trusted diagram is notoriously difficult. Datasheets are scattered, and forum posts often contain conflicting wire colors. This article consolidates verified technical data to provide a definitive reference for the 48-pin connector, including power, ground, sensors, injectors, ignition coils, and diagnostics. Are you planning to perform a or troubleshooting
The ECU usually connects to the vehicle via (often the larger or upper connector) and Connector B (the smaller or lower connector).
The IAW 48P2 requires three distinct voltage sources: No spark and no fuel
Comprehensive wiring schematics and pinout guides for the IAW 48P2 can be found on platforms like and technical repositories such as or to carry out an immobilizer bypass