Electronic control technology is widely used in the automotive field, automotive electronics into the mainstream, the traditional mechanical fuel injection has also been replaced by electronically controlled fuel injection. Because the EFI engine is a complex control system, any small part of the error, will affect the engine power output. And the car fault judgment, the need for a corresponding theory and inspection methods, the author through years of practical operation and theoretical study, comes down to a simple and applicable inspection methods to share with everyone.
    First, the circuit components intuitive inspection method
    In case of failure should first check the sensor and the actuator of the power supply lines, generally most of the failure of the line is caused by poor or short circuit. In the range of line distribution, check from where it is easy to wear. A faulty car. Is in a local mountain potholes on the road when the road suddenly turn off, no longer can start later. Considering the sudden road conditions and terrain conditions, the author directly check the distribution of the line and easy to wear the place, found in the firewall near the brake booster near the four wires have been broken, of which there are two lines of the Ignition system lines, the original car before and after the engine stent was damaged, resulting in excessive force between the engine and the wiring harness, the failure occurred.
    Second, the line pumping line inspection method
    Some problems will appear in the people can not see the place, the problem will lead to serious car engine can not start, sometimes good sometimes bad, encountered this situation, according to the phenomenon of fault with a small clamp to a harness One by one slowly tic test, easy to take a good fastening. There is a car occasionally not start, this problem is certainly not easy to find, with the clamp on the line of the wire test pumping, the results of a wire is easily pumped out and found that the wire is worn line, due to the wear Of the place is a hard plastic, it did not cause the line accident, to be troubleshooting after the wire repair.