That can self-diagnosis system in Japanese cars?

Do not mistake that self-diagnosis of Japanese cars is akin to "all-seeing eye of." This system can only identify the likely causes some problems. But if you intend to implement, for example, a qualified repair Honda Civic, in which case a professional diagnostic equipment. Many Japanese cars with engine management, work units and blocks is controlled by special sensors. If the testimony of one of the controllers vary with the parameters laid down in that computer's memory, this sensor is disabled. Fed starts to operate a bypass program. With the normalization of the sensor node is turned back on by-pass the program is blocked, the engine operates in the usual way. At the time of the reserve at the displays include light «CHECK». At the time of termination of the program bypass the LED goes out. Each connection pool is fixed in memory. It is true that written information is erased when power control unit. Looking through the data, we can assume that the cause of failure of the power plant and what repairs need to make a Honda. Faults are different. In particular, the engine stalls, there is increased fuel consumption, manifested a certain failure with increasing engine speed, etc. In all such cases, light illuminates «CHECK». A fault code is stored in the memory control unit. Of course, self-diagnostic system is very useful for the identification of random failures of the power unit. However, many problems remain inaccessible to her. In the program processing and management is clearly present mass of the "white spots". For example, if a set of sluggish speed is unlikely to be revealed normal debris of a catalyst. Of course, new technologies have allowed a more sophisticated self-diagnostics system. They have features and more, and more precisely the program itself works. All this greatly simplifies and facilitates, for example, automatic transmission repair Honda, engine troubleshooting. However, these systems are not omnipotent. Ordinary crack in a soft ripple, which causes depletion of the fuel-air mixture, "smart" system does not recognize.