Error code occurred during ECU Upgrade (5021-10-7005)

Symptom: ECU upgrade in progress, error code [5021-10-7005]

Cause: ECU upgrade communication open command, CAN BUS error occurred

Resolution:

1. It is necessary to check whether the car is equipped with after-market equipment.
2. It is necessary to connect the diagnostic device and check the normal display of the sensor output of the target controller.
3. If the connection status and sensor output are normal, retry the ECU upgrade.