Grounding, in fact, is to select the zero potential point of the vehicle body. The ground wire is a part of the circuit of the automobile circuit and plays a very important role in the automobile circuit. Because the engine controller ECU has a great influence on the performance and safety of the whole vehicle, and is easily interfered by other electrical equipment, its grounding point must be set separately. At the same time, in order to reduce the voltage drop of the wire, the nearest ground should be selected.
At present, according to the above requirements, a special grounding point is set on the engine block. The ECU grounding wire in the engine wiring harness is directly connected to the grounding point through the hole connector, and is directly transferred to the negative electrode of the battery through the corresponding wiring harness of the chassis. .