3500B and 3500C Marine Propulsion Engines Caterpillar


E279 High Aftercooler Temperature Warning

Usage:

3516B B5G
产生此代码的情况:

电子控制模块(ECM)可检测以下状况:

  • 后冷器温度高于 102 °C (216 °F) 的缺省温度长达 5 秒。

  • 诊断代码 279-03 和 279-04 未激活。

系统响应:

ECM 将会记录该事件。 如果温度降至 99 °C (210 °F) 以下,则警告解除。

  • 后冷器可能有故障。

  • 后冷器温度传感器可能有问题。

测试步骤 1. 检查有无"激活的"诊断代码。

  1. 启动 Caterpillar 电子技师(ET)。

  1. 将电源转到 ON(接通)位置。 发动机应为关闭状态。

  1. 检查有无任何激活的或记录的诊断代码。

预期结果:

应没有任何诊断代码出现。

结果:

  • 正常 - 没有任何诊断代码出现。 继续测试步骤 2。

  • 异常 - 有诊断代码出现。

    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和排除"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。 可能的原因,请参阅故障诊断和排除, "冷却液温度过高"中的诊断步骤。

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

  • 异常 - 冷却系统有故障。

    修复: 修理故障。 确保修理后故障被排除。

    停止

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