C15 and C18 Petrolem Generator Set Engines Caterpillar


Diagnostic Capabilities

Usage:

C15 115

诊断代码

发动机 ECM(Electronic Control Module,电子控制模块)能够监控 ECM 与发动机部件之间的电路。 ECM 还能监控发动机的工况。 如果 ECM 检测到故障,就会产生一个代码。

有两种代码:

  • 诊断代码

  • 事件代码

诊断代码 - 诊断代码表示存在电气故障,比如发动机配线或电气部件短路或开路。

事件代码 - 事件代码是因为检测到发动机异常工况而产生的。 例如,如果机油压力过低,就会产生一个事件代码。 在此情况下,事件代码表明故障现象。 事件代码一般表示存在机械故障,而不是电气故障。

代码可以有两种不同的状态:

  • 激活

  • 记录

激活的代码

激活的代码表示存在故障。 首先应处理激活的代码。 有关特定代码的相应故障诊断与排除步骤,请参阅以下故障诊断与排除步骤:

  • 故障诊断与排除, "诊断故障代码列表"

  • 故障诊断与排除, "事件代码列表"

记录的代码

这些代码被记录和存储在 ECM 存储器中。 故障可能已经排除和/或故障可能不再存在。 系统通电后,每当断开一个部件,就可能产生一个激活的诊断代码。 重新连接该部件后,代码不再为激活状态,但代码可能被记录下来。

记录的代码可能并不意味着需要修理。 故障可能只是暂时存在过。 记录的代码可能对间歇性故障的诊断和排除有帮助。 记录的代码也可以用来检查发动机和电子系统的性能。

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