3500B and 3500B High Displacement Generator Set Engines Caterpillar


Self-Diagnostics

Usage:

785C 1HW
电子控制模块(ECM)可检测电子系统的问题和发动机操作问题。 检测到一个问题时,会生成一个代码。 同时也产生一个报警。 代码分以下两种:

  • 诊断

  • 事件

诊断代码 - 检测到电子系统的问题时,ECM 会生成一个诊断代码, 指示该电子控制系统的具体问题。

事件代码 - 检测到发动机有异常操作状况时,会生成一个事件代码。 例如,机油压力太低时,会生成一个事件代码。 在这种情况下,事件代码指示问题的现象。

代码可以是两种状态:

  • 当前状态

  • 记录状态

当前代码 - 当前诊断代码或当前事件代码表示检测到当前有一个问题。 当前代码需要立即予以关注。 请务必首先修正当前代码,然后再修正记录的代码。

记录的代码 - 生成的每一个代码都存储在 ECM 的永久存储器中。 这些代码便是记录的代码。

记录的代码不一定表示需要修正。 问题可能只是暂时存在过, 也可能在该代码被记录后已经解决。 系统加电后,如果断开某个部件,也可能生成一条当前诊断代码。 重新连接此部件后,该代码即不再处于当前状态。 记录的代码有助于对间歇性问题进行故障诊断和排除, 也可用来检查发动机和电子系统的性能。

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