论文部分内容阅读
故障现象:关闭点火开关后发动机不熄火,仪表指示灯不熄灭,十多分钟后会自动熄火,仪表指示恢复正常。故障诊断:由于该车在其他修理厂检修过该故障,到站后用诊断仪检测,未发现有价值的故障码。根据故障现象首先怀疑点火电源15号电在关闭点火开关后没有断开,用诊断仪在转向柱控制单元J527里读取点火开关信号,打开点火开关后诊断仪显示如图1所示。关闭点火开关后诊断仪显示如图2所示。根据数据判断点火电源信号正
Symptoms: the engine does not turn off after turning off the ignition switch, the indicator light does not go out, turn off automatically after more than 10 minutes, the meter indicates back to normal. Fault diagnosis: As the car overhaul the other repair shop fault, after the arrival of the test with a diagnostic tool, found no valuable fault code. According to the phenomenon of the first suspected ignition power supply 15 after the ignition switch is not turned off, with the diagnostic instrument in the steering column control unit J527 read the ignition switch signal, turn on the ignition switch after the diagnostic display shown in Figure 1. Turn off the ignition switch after the diagnostic display shown in Figure 2. According to the data to determine the ignition power signal positive