1. Before performing work on electrical equipment, disconnect the cable from the negative terminal of the battery.
2. If it is necessary to disconnect the battery for a check or repair, first of all disconnect the cable from the negative terminal, which is connected to the body (weight) car.
3. When carrying out welding work, disconnect the battery and connectors of the electronic control unit.
4. Do not open the ECU cover unless absolutely necessary, as the ECU's integrated circuit may be damaged by static electricity.