Histogramming
柱状图数据可通过 Caterpillar Electronic Technician（ET）显示，以显示发动机性能趋势。 可采用直方图来评估发动机有可能出现的性能问题。
注: 激活某些诊断代码和/或事件代码可直接记录相关参数的直方图信息。 故障诊断和排除期间，这一信息会有帮助。 与诊断代码和事件代码有关的具体信息，请参阅故障诊断和排除手册。
历史性能数据的存储格式能够用于 Cat ET 建立柱状图。 数据也可以是发动机负载和发动机的实际排气温度。
Caterpillar Information System:
345D, 349D and 349D2 Excavators and 345D MHPU, 349D MHPU and 349D2 MHPU Mobile Hydraulic Power Units Machine Electronic Control System General Information
2009/01/26 Pushrods {1102, 1121, 1123, 1209}
390D Excavator Machine System Specifications Sprocket
3516C Generator Set Engines Engine Mount
C27 and C32 Generator Set Engines Fan Drive
3516C Generator Set Engines Water Lines
3500 Engines Water Lines
C7 Engines for Combat and Tactical Vehicles Noise from Injectors with Keyswitch ON
C7 Engines for Combat and Tactical Vehicles Ignition Keyswitch Circuit and Battery Supply Circuit - Test
CX35-P800 Petroleum Transmission and Petroleum Power Train Packages Transmission and Torque Converter - Connect
CX35-P800 Petroleum Transmission and Petroleum Power Train Packages Transmission and Torque Converter - Separate
Some Engines Are Being Removed from Service Letter, PI10723{1061} Some Engines Are Being Removed from Service Letter, PI10723{1061}
345D, 349D and 349D2 Excavator Machine System Specifications Main Control Valve
390D Excavator Machine System Specifications Track
345D, 349D and 349D2 Excavators and 345D MHPU, 349D MHPU and 349D2 MHPU Mobile Hydraulic Power Units Machine Electronic Control System System Operation
Configuring the Active Power Control (APC) Parameter for the Uninterruptible Power Supply ( UPS ){4480} Configuring the Active Power Control (APC) Parameter for the Uninterruptible Power Supply ( UPS ){4480}
2009/01/26 An Operating Parameter Is Now Required During Start-up {4480}
345D MHPU and 349D MHPU Mobile Hydraulic Power Units Machine System Return Lines (Boom Lowering Control)
3500 Engines for Caterpillar Built Generator Sets Fuel Injector
349F and 352F Excavators Machine System Specifications Counterweight Cylinder
G3508B, G3512B, G3512B, G3516B and G3520B Petroleum Engines Accumulator - Remove
C27 and C32 Generator Sets Belts - Inspect/Adjust/Replace
345D, 349D and 349D2 Excavators and 345D MHPU, 349D MHPU and 349D2 MHPU Mobile Hydraulic Power Units Machine Electronic Control System Diagnostic Operation
793F Off-Highway Truck Braking System - Test