Diesel Particulate Filter Has Low Inlet Pressure
柴油微粒滤清器（DPF）低进口压力的可能原因是排气泄漏。
如果下列事件代码为现行状态，采用此步骤。 有关事件代码的信息，参考故障排除, "事件代码"。
注: 以下某些代码可能不适用于特定的应用。
在执行以下步骤之前，使用 Cat 电子技师清除所有"现行"代码。 参考故障排除, "诊断能力 - 清除现行机载诊断（OBD）代码"以了解关于清除"现行"代码的更多信息。
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| 诊断故障代码 | |||
| CDL 代码 | J1939 代码 | 代码说明 （代码说明可能不同） |
注释 |
| E1154（1） | 3609-17 | 低 DPF #1 进气压力 | 记录该代码。 |
| E1154（2） | 3609-18 | 低 DPF #1 进气压力 | 记录该代码。 |
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| 故障排除测试步骤 | 数值 | 结果 |
1. 检查排气系统是否泄漏 A. 检查排气系统的排气歧管和 ARD 后处理组件进口之间是否泄漏。 B. 检查排气系统有无松动的连接或敞开的端口。 |
排气泄漏 |
结果：排气系统泄漏。 修理排气系统。 将发动机重新投入使用。 结果：排气系统没有泄漏。 转至测试步骤 2。 |
2. 检查 DPF 压差管、接头和歧管 A. 确保 DPF 压差管连接紧固并且无泄漏。 B. 确保 DPF 压差管、接头和歧管无阻塞。 确保湿气未在管、接头和歧管内结冰。 |
阻塞 |
结果：DPF 压差管、接头和歧管连接紧固并且无泄漏和阻塞。 转至测试步骤 3。 结果：DPF 压差管未连接或管、接头和歧管存在泄漏和阻塞。 清洁、修理或更换管。 清除所有代码。 执行 ARD Ignition Test（ARD 点火测试）。 如果 ARD Ignition Test（ARD 点火测试）成功，则将发动机重新投入使用。 如果 ARD Ignition Test（ARD 点火测试）失败，则转至测试步骤 3。 |
3. 检查柴油微粒滤清器 A. 检查 DPF 的进口。 检查 DPF 有无缺失或损坏的 DPF 砖。 |
DPF 砖损坏 |
结果：DPF 有损坏或缺失的 DPF 砖。 更换损坏 DPF 或缺失的 DPF 砖。 将发动机重新投入使用。 |
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