C3.4B Engines Caterpillar


Fuel Contains Water

Usage:

CD-44B 398
此步骤涉及以下诊断代码:

表 1
燃油含水的诊断故障代码    
J1939 代码     说明     备注    
97-15     燃油含水指示器:高 - 最低严重级别 (1)     电子控制模块(ECM)检测到燃油含水存在至少 60 秒钟。

如配有警告灯,警告灯将点亮。

当没有检测到燃油至少 0.6 秒钟时,故障将清除。    

注: 可能无法用肉眼识别出油杯中的水分。 燃油系统中的水可能会变为深黄色。 燃油和水的颜色相似,让人难以区分。

建议的措施

注: 按所列步骤顺序完成以上步骤。

表 2
故障诊断与排除测试步骤     数值     结果    

1. 排空油水分离器杯。

A. 将点火钥匙转到断开位置。

B. 排放油水分离器杯。 请参阅操作和保养手册, "燃油系统粗滤器/油水分离器 - 排放"。

C. 如有必要,充注燃油系统。 参考操作和保养手册, "燃油系统 - 充注"。

D. 将点火钥匙转到通开位置。 请勿起动发动机。 等待 1 分钟。
   

油水分离器
   

结果:"燃油含水"警告在 1 分钟内消失。

转至测试步骤 2。

结果:"燃油含水"警告持续点亮。

转至测试步骤 3。
   

2. 确认燃油中不含水分

运转发动机 5 分钟。
   

燃油含水
   

结果:"燃油含水"警告没有在 5 分钟内再现。

使机组返回工作。

结果:"燃油含水"警告在 5 分钟内再现。

供油被水污染。 放空燃油箱后在燃油箱中加入干净的燃油。

重复测试步骤 1 中的步骤。
   

3. 燃油含水开关

A. 检查燃油含水开关的操作情况。 请参阅故障诊断与排除, "燃油含水 - 测试"。
   

燃油含水开关
   

结果:燃油含水开关需要修理。

重复测试步骤 1 中的步骤。

结果:燃油含水开关正常。

供油被水污染。 放空燃油箱后在燃油箱中加入干净的燃油。

重复测试步骤 1 中的步骤。
   

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