Symptom: ECU upgrade in progress, error code [1000-C8-0027] occurs
Cause: Socket connection failure during ethernet event security authentication
1. It is necessary to check whether the car is equipped with after-market equipment.
2. It is necessary to connect the ECI cable normally and check the tablet's fixed IP.
3. It is necessary to connect the diagnostic device and check the normal display of the sensor output of the gateway controller.
4. After removing the vehicle power connector, proceed with the installation work 5 minutes later and retry the ECU upgrade.