Automobile -used solenoid valve failure diagnosis deals with circuit

The utility model provides an automobile -used solenoid valve failure diagnosis deals with circuit, includes CPU, solenoid valve, logical operation treatment circuit, NULL and display device, the logical operation treatment circuit includes NAND gate chip, NOR gate chip, comparator, during the use, by the state of NULL detection solenoid valve to send to CPU, comparator with the testing result respectively with the form of voltage and whether have the trouble in order to judge, if there is the trouble, can not only export trouble information for display device, moreover can be through the control of logical operation treatment circuit disconnection in time to the solenoid valve, in order to realize the trouble reply. Failure diagnosis and reply can not only be carried out to the solenoid valve through hardware, two kinds of ways of software to this design, and the accuracy is higher, reply nature is stronger, and the security is higher moreover, the commonality is stronger. 种车用电磁阀故障诊断应对电路，包括CPU、电磁阀、逻辑运算处理电路、集