What's the difference between having a driving computer and not having one? Does it affect the car?

The driving computer is equivalent to the command center of the mechanical part of the vehicle, and the driver is the commander. Input various commands into the trip computer, and the trip computer will command all parts of the vehicle to execute the commands. Modern cars are inseparable from the help of computers. From the invisible functions such as statistical adjustment of driving information, GPS connection, use of on-board electrical appliances, fault information analysis, use of air conditioner, exhaust emission and oil consumption to electronically controlled fuel injection, electronic intake and exhaust advance angle control, electronic ignition, etc., on-board electronic control system is essential. At present, ECU is not only used in engines, but also in many other places. For example, anti-lock braking system, four-wheel drive system, electronically controlled automatic transmission, active suspension system, airbag system, multi-directional adjustable electronically controlled seat, etc. Are equipped with their own ECU. With the improvement of automotive electronic automation, ECU will increase day by day, and the circuit will become more and more complicated. In order to simplify the circuit and reduce the cost, a technology called multi-channel communication network is adopted to transmit information between multiple ECU on the vehicle, and the ECU of the whole vehicle forms a network system, that is, CAN data bus. Specific to Mazda 3, all series models have driving computers.