Diagnostic Capabilities
电子控制模块（ECM）监控 ECM 和发动机部件之间的电路。 ECM 还监控发动机工作状况。 如果 ECM 检测到故障，就会产生一个代码。
有两种代码：
- 诊断故障代码
- 发动机事件
故障诊断代码 - 故障诊断代码表明存在电气故障。 代码可能表示发动机导线或电气部件中存在短路或开路。
发动机事件 - 发动机事件表示检测到异常发动机工作状况。 例如，如果机油压力过低，就会生成一个故障诊断代码。 此时，故障诊断代码表示故障现象。 事件代码表示存在异常工作状况或机械故障，而不是电气故障。
代码可以有两种不同的状态：
- 主动
- 记录
现行代码表示存在故障。 首先应处理现行代码。 请参阅故障诊断与排除, "诊断故障代码"以了解特定代码的相应故障诊断与排除步骤。
这些代码被记录和存储在 ECM 存储器中。 故障可能已经排除和/或故障可能不再存在。 如果系统通电，一旦有部件断开，诊断代码即激活。 重新连接部件后，代码不再为激活状态，但代码会记录下来。
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过。 记录的代码可能对间歇性故障的诊断和排除有帮助。 记录的代码也可以用来检查发动机和电子系统的性能。
Caterpillar Information System:
Procedure for Installing the 296-0014 Prelubrication Oil Pump Gp on C175 Generator Sets{1307, 1319} Procedure for Installing the 296-0014 Prelubrication Oil Pump Gp on C175 Generator Sets{1307, 1319}
C18 Generator Set Engine Oil and Filter - Change
C27 Generator Set Engines Acceleration Is Poor or Throttle Response Is Poor
C27 Petroleum Generator Set Engines Coolant Level - Test
C9.3 Engines for Caterpillar Built Machines Inlet and Exhaust Valve Guides - Remove and Install
358-4528 (380/480 V, 50/60 Hz, 3 Phase), 457-6040 (230V, 60 Hz, Single Phase) , 457-6039 (230V, 50 Hz, Single Phase) Hose Machine Group Set-Up and Operation{0599, 0684} 358-4528 (380/480 V, 50/60 Hz, 3 Phase), 457-6040 (230V, 60 Hz, Single Phase) , 457-6039 (230V, 50 Hz, Single Phase) Hose Machine Group Set-Up and Operation{0599, 0684}
2010/08/26 A Prelube Pump Is Available for C175-16 Generator Sets {1307, 1319}
797F Off-Highway Truck Hydraulic System Worksheets
303.5E2 CR, 304E2 CR, 305E2 CR and 305.5E2 CR Mini Hydraulic Excavators Quick Coupler - Lubricate - Mechanical Pin Grabber Quick Coupler (If Equipped)
Reusability Inspection of Seal Ring and Stator Carrier Assemblies for Certain Models {0760, 0761, 3101, 3129, 3160, 7555} Reusability Inspection of Seal Ring and Stator Carrier Assemblies for Certain Models {0760, 0761, 3101, 3129, 3160, 7555}
Procedure to Unlock the 341-8700 Fuel Injection Pump Gp {1251} Procedure to Unlock the 341-8700 Fuel Injection Pump Gp {1251}
303.5E2 CR, 304E2 CR, 305E2 CR and 305.5E2 CR Mini Hydraulic Excavators Quick Coupler Operation - Mechanical Pin Grabber Quick Coupler (If Equipped)
C27 Petroleum Generator Set Engines Exhaust Has Black Smoke
C27 Petroleum Generator Set Engines Fuel Pressure Is Low
C15 and C18 Tier 4 Final Engines Engine Oil Pressure - Test
C175-16 Marine Propulsion Engines Alternator Mounting
C7.1 Industrial Engine and Generator Set ARD Failed to Ignite
C27 Petroleum Generator Set Engines Intake Manifold Air Temperature Is High
C27 and C32 Engines for Caterpillar Built Machines Aftercooler - Test - If Equipped
C175 Generator Sets Belts - Inspect/Replace
C27 Petroleum Generator Set Engines Pressure Sensor - Calibrate
C27 Petroleum Generator Set Engines Oil Temperature Is High
C175 Generator Sets Belt Tensioner - Check
C13, C15, and C18 Tier 4 Interim Engines Exhaust Balance Valve - Test