C15 and C18 Engines for Caterpillar Built Machines Caterpillar


E198 Low Fuel Pressure

Usage:

826K 2L3
产生此代码的情况:

电子控制模块 (ECM) 检测到发动机燃油压力有故障。 故障诊断与排除, "事件代码"中提供有本事件代码默认设置及范围的资料。

系统响应:

ECM 将会记录该事件。

E198(1)

  • 它对性能没有影响。

E198(2)

  • 发动机功率降低。

测试步骤 1. 检查燃油系统部件

  1. 检查输油泵体中的安全阀。 检查弹簧或阀组件是否损坏。

  1. 核实燃油歧管中的压力调节阀是否工作正常。 检查阀组件是否损坏或有污垢。

  1. 检查从燃油滤清器底座到燃油箱的回油管是否损坏或皱缩。

预期结果:

安全阀、压力调节阀或连至燃油箱的回油管没有问题。

结果:

  • 与预期结果相符 - 安全阀、压力调节阀或连至燃油箱的回油管有问题。

    修复: 进行必要的修理。 确认修理后问题被排除。请参考系统操作/测试与调整。

    停止

  • 与预期结果不相符 - 燃油系统未发现机械问题。

    修复: 如果怀疑传感器电路存在电气问题,请参阅故障诊断与排除, "发动机压力传感器开路或短路 - 测试"部分的诊断功能测试。

    停止

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