Step1：Copy the upgrade file .iap to the root directory of the U disk 

Step2：Click Settings icon

Step3：Click “Factory” and enter password（168）-Confirm

Step4：Click “Original Car Agreement”

Step5：Click “CAN box upgrade-Confirm”

Step6：In the upgrade screen, click the magnifying glassicon, as shown below

Step7：In the popup interface, find the USB flash drive,in the USB flash drive directory to find the upgrade file just copied in, andthen select it

Step8：Click “Upgrade”

Step9：Click “START-Confirm”

Step10：The upgrade process will then begin; simply wait for the upgrade result to display: Successful, reset the machine.

Step11：After the machine is powered off and restarted, you can check the CAN Box version in "Settings - System - About device - CAN protocol version" and verify that the version matches the upgraded IAP file version.

 YouTube Video link：https://youtu.be/vA89z7f0V-Q