Error Code Occurs During ECU Upgrade (9000-1A-0063)

Symptom:  Error code [9000-1A-0063] occurs during an ECU upgrade.

Cause: The target determination command performed before the ECU upgrade through the ECU app failed.

Solution: 

1. Check whether any aftermarket equipment is installed in the vehicle.
2. Verify the diagnostic tool connection and confirm that the sensor output from the target control unit is displayed correctly.
3. If the connection and sensor output are normal, disconnect the vehicle power connector, wait 5 minutes, and reconnect it. Then perform the pre-upgrade target determination and retry the ECU upgrade.