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例1 一辆日产风度(A32)乘用车,发动机怠速运行时容易自行熄火,但在其他工况时发动机运行均很正常,故障指示灯也不点亮。用手提汽车故障诊断仪进行检查,无故障代码显示;检测各相关传感器信号数据,都在正常范围内。接着对发动机基本油、电路进行维护:清洗燃油滤清器,检查燃油压力;清洁空气滤清器,清洗节气门体和进气歧管;清洗各缸喷油器并测其喷油量;拆下各缸火花塞,清洁电极;测量各缸高压分线电阻。在整个维护过程中,都未发现问题。将燃油压力表接在输油管上,将故障诊断仪与数据传输接口连接好,起动发动机进行试验。发动机怠
Example 1 a Nissan demeanor (A32) passenger car, the engine is easy to self-run-off idle, but in other conditions the engine is running normally, the fault indicator does not light. Car hand-held diagnostic tool for troubleshooting, fault-free code display; testing the relevant sensor signal data are in the normal range. Then the basic engine oil, the circuit for maintenance: cleaning the fuel filter, check the fuel pressure; clean the air cleaner, cleaning the throttle body and the intake manifold; cleaning each cylinder injector and measure the fuel injection; Under the cylinder spark plugs, clean the electrode; measuring the high pressure line resistance of each cylinder. During the entire maintenance process, no problems were found. The fuel pressure gauge connected to the pipeline, the fault diagnostic apparatus and data transmission interface is connected, start the engine for testing. Engine idle