Diagnostic Capabilities
电子控制系统能够检测故障。 当检测到故障时，系统会产生一个故障诊断代码。 在大多数情况下，该代码也会被记录在电子控制模块（ECM）中。
当产生代码时，代码处于现行状态。 现行代码表示目前存在某种故障。 在进行其他任何工作之前，始终要诊断和排除现行代码的故障。 如果发动机存在一个激现行代码，则应在本手册中找到该代码，然后继续进行诊断，找出该代码的原因。
被存储在 ECM 中的诊断代码也会被记录。 记录的代码不一定表示需要进行某种修理。 故障可能是暂时的，或者故障可能在记录后已修复。 记录的代码可能由间歇性故障引起。
请参考故障诊断与排除, "故障诊断代码"以了解适用于这些发动机的完整代码列表。
Caterpillar Information System:
C7 On-highway Engine Fuel Pressure Sensor
C15 On-highway Engine Turbocharger
Guidelines for 2007 and 2008 Model Year On-Highway Engine Emission Certification{1000, 775E} Guidelines for 2007 and 2008 Model Year On-Highway Engine Emission Certification{1000, 775E}
2008/06/30 An Improved Turbocharger is Used {1052, 1053}
G3516C, G3516E, and G3512E Generator Set Engines Diagnostic Trouble Codes
345D MHPU and 349D MHPU Mobile Hydraulic Power Units Machine System Front Lines
325D and 329D Excavators and 325D Material Handler Machine System Specifications Pilot Valve (Joystick)
345D, 349D and 349D2 Excavator Machine System Specifications Cooling Lines - Air
C175-16 and C175-20 Generator Set Engines Electrical Connectors
345D, 349D and 349D2 Excavators and 345D MHPU, 349D MHPU and 349D2 MHPU Mobile Hydraulic Power Units Machine Electronic Control System MID 039 - CID 1666 - FMI 06
345D, 349D and 349D2 Excavators and 345D MHPU, 349D MHPU and 349D2 MHPU Mobile Hydraulic Power Units Machine Electronic Control System MID 039 - CID 1666 - FMI 05
345D, 349D and 349D2 Excavators and 345D MHPU, 349D MHPU and 349D2 MHPU Mobile Hydraulic Power Units Machine Electronic Control System MID 039 - CID 1666 - FMI 03
C9.3 Tier 4 Final Engines Compression Brake Lash - Adjust
3500 Petroleum Engines and Petroleum Generator Sets Engine Oil and Filter - Change
2008/05/19 New Software for Product Link is Now Available {7606, 7620}
C15 On-Highway Engine Turbocharger
G3520C and G3520E Engines Engine Oil Pump
C6.6 Marine Generator Set Engine Description
C6.6 Marine Generator Set Emissions Certification Film
345D MHPU and 349D MHPU Mobile Hydraulic Power Units Machine System Pilot Lines
Grounding Design Guide for Electric Power Generation Products {4450, 4459} Grounding Design Guide for Electric Power Generation Products {4450, 4459}
C6.6 Marine Generator Set Product Lifting
2008/05/26 An Improved Mounting of the Alternator Belt Guard Is Now Used {7174, 7553}
C13T-TH35 and C15T-TH35 Petroleum Packages Configuration Parameters - Customer Specified Parameters