Engine Overspeed
使用本步骤以诊断和排除发动机超速故障，或如果有以下任何事件代码为现行状态，则使用本步骤。 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, "事件代码列表"。
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| 事件代码 | ||
|---|---|---|
| 代码和描述 | 产生此代码的状况 | 系统响应 |
| E004（3）发动机超速停机 | 在延迟时间内发动机转速持续超过发动机超速触发点。 | 将会启动空气切断阀。 发动机将停机。 必须将动力循环至电子控制模块（ECM），以复位代码。 记录该代码。 |
| E190（1）发动机超速警告 | 记录该代码。 | |
可能原因
- 进气可燃。
- 负载突然减少
建议的措施
进气可燃
检查周围大气中有无碳氢化合物。 不要在周围大气中含有碳氢化合物的环境中运转发动机。
负载突然减少
逐渐减少发动机上的负载。
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