C13, C15, and C18 Generator Set Engines Caterpillar


E199 Low Coolant Temperature

Usage:

C18 AR3
产生此代码的情况:

电子控制模块(ECM)可检测以下状况:

  • 发动机冷却液温度低于缺省温度 75 °C (167 °F) 五秒

  • ECM 已通电十分钟。

注: "Low Coolant Temperature"(冷却液温度过低)监测不能等待发动机开始运转。 起动时,当 ECM 通电时 "Trip Delay"(激发延迟)开始。 对于 EPG 发动机,冷却液温度过低表示有一台水套水加热器可能没有正常工作。

系统响应:

事件代码会记录下来。 温度回到超过 77 °C (171 °F) 四秒后,冷却液温度过低引起的警告会关闭。

  • 冷却系统可能有问题。

  • 冷却液温度传感器可能有问题。

测试步骤 1. 检查有无诊断代码

  1. 启动 Caterpillar 电子技师(ET)。

  1. 将电源转到 ON(接通)位置。

  1. 检查有无任何激活的或记录的诊断代码。

预期结果:

应无任何诊断代码存在。

结果:

  • 异常 - 应无任何诊断代码存在。 继续进行测试 2。

  • 不正常 - 存在诊断代码。

    修复: 修理出现的诊断代码。 请参阅本手册"利用诊断代码进行故障诊断与排除"章节中的相关专题。 确保修理后故障被排除。

    停止

测试步骤 2. 对冷却系统进行检查。

  1. 对冷却系统进行检查。 请参阅测试与调整手册以了解有关检查冷却系统的信息。

预期结果:

冷却系统没有故障。

结果:

  • 正常 - 可能存在间歇性故障。

    修复: 监测发动机的运行。 修理故障。 确保修理后故障被排除。

    停止

  • 不正常 - 冷却系统有故障。

    修复: 修理冷却系统。 确保修理后故障被排除。

    停止

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