The dashboard lights will flash, gauges may drop to zero, and error messages (like "Hill Start Assist Unavailable") may appear. This is normal. Wait for the progress bar to reach 100%. Step 6: Finalizing and Clearing Error Codes
During this final step, do not touch anything. Do not close the software, unplug the adapter, turn off the laptop, or touch the vehicle's ignition. Any interruption could be catastrophic. Just watch the progress bar and wait. forscan pcm update
Before altering any firmware, back up your vehicle's factory programming. Open FORScan and click the icon at the bottom left. Turn the vehicle ignition to ON (Engine OFF). The dashboard lights will flash, gauges may drop