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一辆’90BMW525i轿车在正常行驶过程中突然熄火,而且再也无法启动。同时仪表板指示屏呈现:TRANS PROGRAM(电子自动变速器故障警示灯)字样,而且当该字幕呈现后,档位指示灯无论在任何档位都会紧随熄灭。 经初步检查,发现燃料系统的喷油嘴没有工作电源;同时点火系统由于控制回路不良而无法工作。发动机在这种情况下自然无法启动,于是首先认为主继电器失效。 一般主继电器位于电脑盒内,颜色为白色,其外壳上标记内部线路如下:
A ’90BMW525i sedan suddenly goes off during normal driving and can no longer be started. At the same time, the dashboard display shows: TRANS PROGRAM (electronic automatic transmission fault warning lamp) words, and when the subtitles appear, the gear indicator no matter in any gear will be followed by extinguished. After a preliminary inspection, it was found that there was no operating power at the injector of the fuel system; meanwhile, the ignition system could not work due to the poor control loop. Engine in this case naturally can not start, then first think the main relay failure. General main relay in the computer box, the color is white, the shell marked on the internal lines are as follows: