The CROM extension files are used as update files for Vehicle Electronic Control Units (ECUs), via Diablosport Predator Handheld Programmer.
The Predator is a high-end, next-generation programmer that flashes for tuning purposes for high-performance vehicles. By simply connecting the Predator to the vehicle's OBDII port, it recognizes it and automatically downloads the specific CROM file for that brand and type of vehicle.
In the CROM file, all the settings necessary for the vehicle's injection and combustion to work in a high-performance way are stored, including the injection map, regulation based on octane, and angle for ignition of the spark plugs.
For more information about this device, go to the following link: https://www.diablosport.com/
If you downloaded a CROM file on Android device you can open it by following steps below:
To open CROM File on iOS device follow steps below:
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For more general information about how to open CROM files, file extension crom and registry you can read one of the following articles: