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故障现象一辆蒙迪欧CD132 2.0 AT车,累计行驶里程约为20万km,客户反映该车在正常行驶过程中突然熄火,发动机无法起动。故障诊断接车后进行检查,接通点火开关,发动机无法起动,仪表盘上的显示情况如图1所示。测量蓄电池电压,为12.5 V,正常,初步认为可能造成此故障的原因有:起动机故障;相关线路、熔丝、起动继电器及搭铁故障;PCM或相关线路故障。首先检查熔丝F29、起动机的搭铁,均正常。用万用表测量起动继电器K22的端子5、端子1的电压,均为12.5 V,正常;检查起动继电器K22的端子3至起动机的线路,正常;用
Fault phenomenon A Mondeo CD132 2.0 AT car, the cumulative mileage of about 200000 km, the customer reflects the car suddenly turn off during normal driving, the engine can not start. Troubleshooting After the car was checked, turn the ignition switch, the engine can not start, the dashboard display as shown in Figure 1. Measure the battery voltage, 12.5 V, normal, initially considered the possible causes of this failure are: starter failure; related lines, fuses, starter relays and ground fault; PCM or related line fault. First check the fuse F29, the starter of the ground, are normal. Use a multimeter to measure the voltage of terminal 5 of starter relay K22 and voltage of terminal 1 of 12.5 V, normal; check the line of terminal 3 of starter relay K22 to the starter,