General Grounding Distribution Principles
● The engine ECU, ABS, etc. have a great impact on the performance and safety of the whole vehicle, and electrical components (such as audio, oil level sensors, etc.) that are easily interfered by other electrical equipment, the grounding of these components must be set separately.

● For the airbag system, the grounding point should not only be set alone, but also a composite grounding point should be used. The purpose is that when one of the grounding points fails, the system can be grounded through the other grounding point to ensure the safe operation of the system.

● To avoid interference with other systems, the radio frequency signal needs to be grounded separately.

● The grounding of the weak signal sensor is best independent, and the grounding point is preferably close to the sensor to ensure the true transmission of the signal.

● Other electrical devices can be combined with each other to share the grounding point according to the specific arrangement. The principle is to ground the nearest ground to avoid excessively long grounding wires, which may cause unnecessary voltage drop.

● The battery negative wire, the engine ground wire, etc. have a large cross-sectional area of ​​the wire, so the length and direction of the wire must be controlled to reduce the voltage drop; in order to increase safety, the engine and the body are generally connected to the negative electrode of the battery separately.

● It is necessary to distinguish electronic grounding and power grounding, and separate analog signal grounding and digital signal grounding to avoid mutual interference between signals.