Engine Overspeeds
此步骤涉及以下诊断代码：
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| 发动机压力传感器的故障诊断代码 | ||
|---|---|---|
| J1939 代码 | 说明 | 备注 |
| 190-15 | 发动机转速：高 - 最低严重程度（1） | 电子控制模块（ECM）检测到发动机转速超过 3100 rpm 至少 5 秒钟。 如有配备，警告灯将闪烁。 |
电子控制模块（ECM）限制燃油流量，以防止发动机转速超出最大转速。 当发动机转速降至低于最大转速时，发动机超速诊断代码将复位。
以下工作状况可导致发动机转速超出此值：
- 在可移动机器上，选择了不正确的变速箱档位。
- 使用不正确的燃油
- 发动机进气中有易燃气体
如果发动机转速超过最大转速，ECM 点亮警告灯，同时记录发动机超速诊断代码。 无需故障诊断与排除。
在电子维修工具上可以查看发动机超速历史记录。
Caterpillar Information System:
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312F and 313F Excavators Engine Oil Level - Check
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XQ Auto Paralleling Engine Stopping
XQ Auto Paralleling Fire Prevention and Explosion Prevention
XQ Auto Paralleling Engine Starting
XQ Auto Paralleling General Hazard Information
XQ Auto Paralleling Burn Prevention
XQ Auto Paralleling Before Starting Engine
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C3.4B Engines Intake Manifold Air Pressure Is High