Diagnostic Codes
诊断代码警告操作员已检测到到电气系统故障。 诊断代码也可向维修技师指示故障的性质。 电子点火系统(EIS)的控制模块和空燃比控制的电子控制模块(ECM)都可产生诊断代码。 诊断代码可在下列电子维修工具上查看到：
数字诊断工具(DDT) - DDT是一个包括一个键盘和一个显示屏的袖珍型装置。
卡特彼勒电子技师(ET) - 卡特彼勒ET一个被设计在个人电脑上运行的软件程序。
如果发动机配备了可选配的空燃比控制，诊断代码也可在ECM上查看到。
诊断代码由模块识别码(MID)、部件识别码(CID)和故障模式识别码(FMI)组成。
模块识别码(MID) - MID是具有两位或三位数字的代码，指示产生诊断代码的电子模块。 EIS控制模块的MID是14。 ECM的MID是18。
部件识别码(CID) - CID是具有3位或4位的数字。 CID指示产生代码的部件。 例如，CID 0317指的是进气歧管压力传感器。
故障模式识别码(FMI) - FMI是2位代码，指示故障的类型。 表1列出故障模式识别码，这些识别码采用"SAE J1587"标准。
Show/hide table
| 故障模式识别码 | |
|---|---|
| FMI | 故障描述 |
| 00 | "数据有效但超过正常工作范围" |
| 01 | "数据有效但低于正常工作范围" |
| 02 | "数据反常、间断或不正确" |
| 03 | "高于正常的电压或高压短路" |
| 04 | "低于正常的电压或低压短路" |
| 05 | "低于正常电流或开路" |
| 06 | "高于正常电流或电路接地" |
| 07 | "机械系统响应不正确" |
| 08 | "不正常的频率、脉冲或周期" |
| 09 | "不正常更新" |
| 10 | "不正常的变化率" |
| 11 | "故障模式无法识别" |
| 12 | "坏的装置或部件" |
| 13 | "超出标定" |
| 14 | "未使用" |
| 15 | "未使用" |
| 16 | "参数未在现" |
| 17 | "模块无反应" |
| 18 | "传感器电源故障" |
| 19 | "状况不符" |
| 20 | "未使用" |
当产生诊断代码时，发动机上的一个指示灯被激活，以便警告操作员。 如果产生代码的状况为短暂状况，代码可由"诊断复位开关(Diagnostic Reset Switch)"清除。 如果代码还在显示屏上，说明代码是活动代码。 活动诊断代码表示电子控制系统目前出现的故障。 尽快地排除故障。
Caterpillar Information System:
G3500 Engines Engine Coolant Temperature (Low)
G3500 Engines Engine Coolant Temperature (High)
G3500 Engines Electronic Service Tool Will Not Communicate with ECM
G3500 Engines Electronic Service Tool Displays UNDETERMINED
G3500 Engines Diagnostic Code Will Not Clear
Field Installation Procedure for Redundant Electronic Overspeed Protection{1915} Field Installation Procedure for Redundant Electronic Overspeed Protection{1915}
2004/05/01 Two New Tools Check Tension on Engine Belts {0701, 0767}
C32 Marine Engine Cylinder Head
C27 and C32 Engines Vibration Damper - Check
C27 and C32 Engines Cooling System - Inspect
C32 Marine Engines Excessive Engine Oil Consumption - Inspect
C27 and C32 Engines Engine Crankcase Pressure (Blowby) - Test
G3500 Engines Engine Shutdown without a Diagnostic Code
C9 Marine Auxiliary and Marine Generator Set Engines CID 0261 FMI 11 Engine Timing Offset fault
C9 Marine Auxiliary and Marine Generator Set Engines CID 0042 FMI 08 Injector Actuation Valve signal abnormal
C15 and C18 Industrial Engines Pump Drive - Remove
C15 and C18 Industrial Engines Pump Drive - Install
Cat Commercial Diesel Engine Fluids Recommendations Diesel Engine Antifreeze/Coolant - DEAC
C15 and C18 Engines for Caterpillar Built Machines Gear Group (Front) - Remove
C15 and C18 Engines for Caterpillar Built Machines Gear Group (Front) - Install
C9 Marine Auxiliary and Marine Generator Set Engines Engine Cranks but Will Not Start
C7 Marine Engine Unit Injector Hydraulic Pump
C1.5 and C2.2 Engines for Caterpillar Built Marine Generator Sets Engine Design
C1.5 and C2.2 Engines for Caterpillar Built Marine Generator Sets Cylinder Head