Intake Manifold Air Pressure Is High
采用此程序进行进气歧管压力高的故障诊断与排除。 如果下列事件代码激活,采用此步骤。 有关事件代码和这些代码的默认触发点的信息,请参阅故障诊断与排除, "事件代码"。 必须进入 Caterpillar 电子技师(ET)的监控系统才能查看这些代码的当前触发点。
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诊断代码表     | ||
---|---|---|
代码和描述     | 产生此代码的状况     | 系统响应     |
273-0 涡轮增压器出口压力传感器:高     | 电子控制模块(ECM)检测到高于 200 kPa (29 psi) 的压力。     |
记录该代码。 参数值设定为 0 kPa (0 psi) 的压力。     |
可能原因
- 诊断代码
- 进气和排气阻塞
- 废气旁通阀(如有配备)
- 全负荷设定值(FLS)
建议的措施
诊断代码
使用 Cat ET 检查有无现行或记录的诊断代码。 在继续执行本步骤之前,诊断并排除所有现行代码。
进气和排气阻塞
- 检查空气滤清器有无损坏。 如有必要,更换损坏的空气滤清器。 请参考操作和保养手册。
- 检查进排气系统有无阻塞和/或漏气。 请参考系统操作/测试和调整。
废气旁通阀(如有配备)
检查废气旁通阀是否正常工作。 请参考系统操作/测试和调整。 如果废气旁通阀执行器(如有配备)出故障,则应更换废气旁通阀执行器(如有配备)。 请参阅拆解和组装。
FLS
确认 FLS 正确。
进气歧管压力传感器
如果怀疑进气歧管压力传感器存在电气故障,请参阅故障诊断与排除, "传感器信号(模拟、有源)",以了解冷却液液位传感器电气故障诊断与排除方面的信息。
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