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: RFC faults are frequently caused by using incorrect bulb wattages (e.g., using a 21W bulb instead of 10W) or low-quality bulbs that the computer misinterprets as a short.

Turn the ignition to the position but do not start the engine.

If the RFC code disappears, the fault lies in the trailer wiring or the plug socket itself, not the truck's internal RFC module. 3. Verify Voltage and Ground Connections

Bookmark the Iveco owner forums, download a few PDF manuals, and always start your diagnosis with the cheapest and simplest solution first—inspect the lights. By understanding the RFC system and knowing where to find the information for free, you are already well on your way to keeping your Stralis on the road and out of the repair shop.

The RFC has detected a fault in the power supply line to the rear-left lighting circuit, often a short-to-ground or blown fuse.

The Stralis uses a standard (or OBD2 16-pin) diagnostic port.

What you are experiencing (e.g., suspension won't lift, lights flashing rapidly)

: Several websites provide downloadable factory manuals at no cost. For electrical architecture, the "Electricidad Iveco Stralis" manual (available on idoc.pub) provides an excellent description of the multiplex system and the functions of the FFC and RFC ECUs. Another valuable resource is the "Iveco Stralis Código De Errores.pdf" , a 420-page document providing deep troubleshooting instructions for the Body Computer (BC) and instrument cluster, which is invaluable for cross-referencing general truck electronics.

I can provide the exact wiring diagram details or component locations for that specific fault. Share public link

Use the steering wheel buttons or the dashboard menu stalk to navigate to .

The RFC detects a resistance mismatch (too low indicates a short; too high indicates an open circuit/blown bulb) and cuts power to that specific circuit to prevent module damage. 2. Rear Axle Air Suspension (ECAS) Errors The RFC processes data coming from the rear height sensors.

Select the module to see specific active and stored DTCs. Troubleshooting Steps