You need to backup your gateway data first
1 You can follow the steps that software show you
2 After you fininshed your step 1 . put dashboard back to car ,check if the mileage will return back
3 if return back , you can wipe your EZS , sometimes the mileage will reset 0 when you wipe your EZS
Tips , our FBS3 function can stop most of the EZS mileage return back to instrument . so ,suggest you do it follow the steps .if it not work then you wipe your EZS
10 июн 2020