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故障现象一辆丰田陆地巡洋舰(LAND CRUISER)4500型越野乘用车,在行驶过一段颠簸路面后突然熄火,经多次起动,无着车迹象。车主将该车拖至笔者所在公司,要求对该车进行检修。检查排除根据故障现象,初步判断为点火系统故障。首先检查是否有高压火:拔下分电器盖上中央高压线,在距离气缸体约5～7mm处做跳火试验。发现,起动机能够带动发动机正常运转,但无高压火产生。然后对点火系统线路及各连接器连接情况进行检查,并未发现有短路或断路的现象。接着用万用表的电压档对点火线圈的低压电路检查,低压电路也正常。
Symptom A LAND CRUISER 4500 off-road passenger vehicle suddenly turns off after a bumpy road and stops after many starts. The owner dragged the car to the author’s company, requiring maintenance of the car. Check and eliminate According to the fault phenomenon, the initial judge for the ignition system failure. First check whether there is high pressure fire: unplug the distributor cover the central high-voltage line, at a distance of about 5 ~ 7mm cylinder at the jump test. Found that the starter can drive the normal operation of the engine, but no high-pressure fire. Then check the ignition system wiring and the connector connection, did not find any short circuit or open circuit phenomenon. Then use the multimeter voltage file on the ignition coil of the low voltage circuit check, low voltage circuit is also normal.