The unit should enter "Green Text" recovery mode and begin flashing the firmware from the USB. Step 5: Post-Update Calibration
If you’ve noticed your car’s Android head unit is lagging, apps are crashing, or the Bluetooth connection is acting up, a firmware update is often the best fix. The (also known as the YT9216 or AC8227L) is one of the most popular boards found in budget-friendly universal car stereos. alps 8227l demo firmware update free
Different 8227L units have different radio chips (7708 vs 8035). If your FM radio stops working after an update, you may need to change the "Radio Chip" setting in the Factory Menu. The unit should enter "Green Text" recovery mode