High Altitude Derate
使用本程序诊断和排除海拔过高减额故障，或者在以下事件代码为激活状态时使用本程序。 有关事件代码和此代码默认触发点的信息，请参阅故障诊断与排除, "事件代码列表"。 必须进入 Caterpillar ET（Electronic Technician，电子技师）的监控系统才能查看此代码的当前触发点。
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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 |
| E009（2）海拔过高减额 | 电子控制模块（ECM）检测到大气压力低于正常值。 | 发动机减额。 将会记录该代码。 |
- 高海拔作业
- 大气压力传感器
发动机运行海拔高度过高。
检查有无任何激活的或记录的大气压力传感器诊断代码。 如果存在激活的诊断代码，请参阅故障诊断与排除, "模拟传感器（激活）"。
Caterpillar Information System:
C2.2 Engine Cylinder Head Valves
C2.2 Engine Rocker Shaft
C2.2 Engine Engine Design
C2.2 Engine and C1.5 Generator Set Fuel Injection Timing - Check
C2.2 Engine and C1.5 Generator Set Troubleshooting
C6.6 Industrial Engine Reference Material
C2.2 Engine and C1.5 Generator Set Basic Engine
C2.2 Engine and C1.5 Generator Set Cooling System
C2.2 Engine and C1.5 Generator Set Glow Plugs
C2.2 Engine and C1.5 Generator Set Lubrication System
C2.2 Engine and C1.5 Generator Set Engine Oil Pressure Switch
C2.2 Engine and C1.5 Generator Set Air Inlet and Exhaust System
C2.2 Engine Cylinder Head
C2.2 Engine Exhaust Manifold
C2.2 Engine Engine Oil Relief Valve
C2.2 Engine and C1.5 Generator Set Engine Valve Lash - Inspect/Adjust
C2.2 Engine Water Temperature Regulator
C2.2 Engine Crankshaft
C2.2 Engine Connecting Rod Bearing Journal
C2.2 Engine Piston and Rings
C2.2 Engine Gear Group (Front)
C2.2 Engine and C1.5 Generator Set Piston Ring Groove - Inspect
C2.2 Engine Engine Oil Pressure Switch
C2.2 Engine Glow Plugs