Self-Diagnostics
电子控制模块（ECM）具有检测电子系统和发动机运行故障的能力。 检测到故障后，生成故障代码。 同时也可能会因之产生报警。 ECM有两种编码：
- 诊断
- 事件
诊断代码 - 检测到电子系统故障后，ECM 会产生诊断代码。 诊断代码指示电路中的具体故障。
诊断编码可以有两个不同的状态。
- 主动
- 记录
活动编码 - 活动诊断编码指示已经检测到活动故障。 活动编码需要立即关注。 一定要首先维修活动编码然后再维修记录编码。
记录的代码 - 每一个产生的编码都被存储在ECM的永久存储器中。 这些编码被记录下来。
事件代码 - 事件代码是因为检测到发动机异常工况而产生的。 例如，如果机油压力过低，就会产生一个事件代码。 在此情况下，事件代码表明故障现象。
记录的代码可能并不意味着需要修理。 故障可能只是暂时存在。 这种故障可能在记录代码时就解决了。 系统通电后，每当断开一个部件，就可能产生一个现行诊断代码。 当此部件被重新装回时，该编码将不再是活动编码。 记录的代码可能对间歇性故障的诊断和排除有帮助。 记录编码也可以用来检查发动机和电子系统的性能。
Caterpillar Information System:
16M Motor Grader Engine Supplement Engine Oil Filter Base - Assemble
16M Motor Grader Engine Supplement Engine Oil Filter Base - Disassemble
246C, 256C, 262C, 262C2 and 272C Skid Steer Loaders Machine Systems Control Manifold and Solenoid (Work Tool Positioner) - If Equipped
777G Off-Highway Truck Power Train Spindle (Rear) - Install
RM-500 Road Reclaimer/Soil Stabilizer Machine Systems Water and Emulsion Lines
777G Off-Highway Truck Power Train Spindle (Rear) - Remove
D6K Track-Type Tractor Hydraulic System Cat Data Link
259D, 279D, 289D, 299D and 299D XHP Compact Track Loaders, 257D, 277D, 287D, 297D and 297D XHP Multi Terrain Loaders and 236D, 242D, 246D, 262D, 272D and 272D XHP Skid Steer Loaders Power Train Piston Pump (Hydrostatic) - Assemble
259D, 279D, 289D, 299D and 299D XHP Compact Track Loaders, 257D, 277D, 287D, 297D and 297D XHP Multi Terrain Loaders and 236D, 242D, 246D, 262D, 272D and 272D XHP Skid Steer Loaders Power Train Piston Pump (Hydrostatic) - Disassemble
C175-16 and C175-20 Engines for Caterpillar Built Machines Engine Oil Screen - Remove and Install
Procedure to Salvage the Slots for the Pin and Holes for the Reaction Dowel in Transmission Clutch Plates, Pistons, and Housings {3030, 3050, 3169, 3170, 3190} Procedure to Salvage the Slots for the Pin and Holes for the Reaction Dowel in Transmission Clutch Plates, Pistons, and Housings {3030, 3050, 3169, 3170, 3190}
814F Series 2 Wheel Dozer, 815F Series 2 Soil Compactor and 816F Series 2 Landfill Compactor Power Train Torque Converter - Assemble
14M Motor Grader Engine Supplement Fuel Filter (Secondary) and Fuel Filter Base - Remove and Install
777D and 777E Off-Highway Truck Air System and Brakes Temperature Sensor (Torque Converter Oil)
C175-16 and C175-20 Engines for Caterpillar Built Machines Engine Oil Pan - Remove - C175-16
14M Motor Grader Engine Supplement Fuel Priming Pump and Water Separator - Remove and Install
C11 and C13 Engines Fan Drive
PL61 Pipelayer and D6K Track-Type Tractor MID 039 - CID 1933 - FMI 04
C13 and C15 On-highway Engines Coolant Contains Oil
735, 740 and 740 EJECTOR Articulated Trucks - Noise from the Power Train Is Sometimes Part of Normal Operation{3030, 3073, 3157, 3166} 735, 740 and 740 EJECTOR Articulated Trucks - Noise from the Power Train Is Sometimes Part of Normal Operation{3030, 3073, 3157, 3166}
777E, 777F and 777G Off-Highway Truck Electric Drive Pump (Prelubrication) - Remove and Install
2006/11/20 Software for Track Feller Bunchers Has Been Updated {1408, 7490, 7620}
14M Motor Grader Engine Supplement Refrigerant Compressor - Remove and Install
PL61 Pipelayer and D6K Track-Type Tractor MID 039 - CID 2211 - FMI 03