Engine Overspeeds
本步骤涉及以下故障诊断代码：
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| 发动机超速故障诊断代码 | ||
|---|---|---|
| J1939 代码 | 说明 | 代码信息 |
| 190-15 | 发动机转速：高 - 最低严重程度（1） | 发动机超出 ECM 中编程设定的值持续 0.6 秒。 没有转速/正时传感器故障诊断代码。 发动机至少已经运转了 3 秒钟。 |
| 190-0 | 发动机转速：高 - 最高严重程度（3） | 发动机超出 ECM 中编程设定的值持续 0.6 秒。 没有转速/正时传感器故障诊断代码。 发动机至少已经运转了 3 秒钟。 发动机将停机。 |
电子控制模块（ECM）限制燃油流量，以防发动机转速超出 ECM 中的值。 发动机转速降至 2800 rpm 以下时，此代码将重置。
以下工作状况可导致发动机转速超出此值：
- 使用不正确的燃油
- 发动机进气中有易燃气体
如果发动机转速超出 ECM 中编程设定的值持续 0.6 秒，记录 190-15 代码。 如果发动机转速超出 ECM 中的值持续 0.6 秒，记录 190-0 代码。 发动机还会停机。 清除该代码时需要出厂密码。 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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