Sensors
传感器向 ECM 提供有关变化工况的信息（输入）。 传感器信号变化以反映该工况的变化。
发动机转速传感器
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| 图 1 | g00288428 |
转速传感器是 ECM 的一个输入装置。 传感器指示发动机的转速。 传感器位于飞轮壳体上。 该转速传感器是频率传感器。 频率传感器产生随转速变化而变化的信号。 传感器通过轮齿产生一个正弦波信号。 该信号被发送到 ECM。 转速传感器有两个到 ECM 的输入连接。 连接是正连接和负连接。 ECM 测量频率并确定转速。 ECM 使用发动机转速来执行多种功能：负载控制, 转向控制 和 行驶控制。
变速箱转速传感器
变速箱转速传感器位于变速箱壳体中。 随着轮齿通过传感器端部，产生交流电压。 电压的频率与轮齿转速成比例。 该信号发送至 ECM。
Caterpillar Information System:
416D, 420D, 424D, 428D, 430D, 432D, 438D and 442D Backhoe Loaders Hydraulic and Steering System Boom Cylinder
768C, 769C, 769D, 772B, 773B, 773D, 776C, 777B, 777D, 784B, 785, 785B, 789, 789B, 793, 793B and 793C Off-Highway Truck/Tractors and 771C, 771D and 775D Quarry Trucks Automatic Retarder Control (ARC) System CID 0710 FMI 12 Solenoid Valve (Auto Retarder Supply) Failed - Test
2001/10/29 Correction To Service Manual Module, SENR1126, "Disassembly And Assembly Of 3500B Machine Engines" , "Remove And Install Cylinder Head Assemblies" {1100, 1101}
2003/03/10 Correction to Specifications, Systems Operation, Testing and Adjusting , "Axle Housing and Bearing Preload - Adjust" {3260}
768C, 769C, 769D, 772B, 773B, 773D, 776C, 777B, 777D, 784B, 785, 785B, 789, 789B, 793, 793B and 793C Off-Highway Truck/Tractors and 771C, 771D and 775D Quarry Trucks Automatic Retarder Control (ARC) System CID 0710 FMI 06 Solenoid Valve (Auto Retarder Supply) Current Above Normal - Test
3408E and 3412E Engines for Caterpillar Built Machines Cat Data Link Circuit - Test
914G Compact Wheel Loader and IT14G Integrated Toolcarrier Transmission Electronic Control System Features
Installation and Reinforcement Procedures for the Upper Link{7120} Installation and Reinforcement Procedures for the Upper Link{7120}
TH350B, TH355B, TH360B and TH460B Telehandlers Towing the Machine
TH210 and TH215 Telehandlers Power Train Piston Pump (Hydrostatic)
TH210 and TH215 Telehandlers Power Train Piston Motor (Hydrostatic)
TH210 and TH215 Telehandlers Power Train Hydrostatic Drive System
768C, 769C, 769D, 772B, 773B, 773D, 776C, 777B, 777D, 784B, 785, 785B, 789, 789B, 793, 793B and 793C Off-Highway Truck/Tractors and 771C, 771D and 775D Quarry Trucks Automatic Retarder Control (ARC) System CID 0711 FMI 03 Solenoid Valve (Auto Retarder Control) Voltage Above Normal - Test
768C, 769C, 769D, 772B, 773B, 773D, 776C, 777B, 777D, 784B, 785, 785B, 789, 789B, 793, 793B and 793C Off-Highway Truck/Tractors and 771C, 771D and 775D Quarry Trucks Automatic Retarder Control (ARC) System CID 0711 FMI 05 Solenoid Valve (Auto Retarder Control) Current Below Normal - Test
773E Off-Highway Truck/Tractor and 775E Quarry Truck Lifting and Tying Down the Machine - 773E Off-Highway Truck
3024C Engine for Caterpillar Built Machines Governor - Disassemble
914G Compact Wheel Loader and IT14G Integrated Toolcarrier Transmission Electronic Control System Relays
CP-433E, CS-423E and CS433E Vibratory Soil Compactors Machine Systems Gear Pump (Steering)
836G Landfill Compactor and 834G Wheel Dozer Steering Control
768C, 769C, 769D, 772B, 773B, 773D, 776C, 777B, 777D, 784B, 785, 785B, 789, 789B, 793, 793B and 793C Off-Highway Truck/Tractors and 771C, 771D and 775D Quarry Trucks Automatic Retarder Control (ARC) System CID 0711 FMI 06 Solenoid Valve (Auto Retarder Control) Current Above Normal - Test
768C, 769C, 769D, 772B, 773B, 773D, 776C, 777B, 777D, 784B, 785, 785B, 789, 789B, 793, 793B and 793C Off-Highway Truck/Tractors and 771C, 771D and 775D Quarry Trucks Automatic Retarder Control (ARC) System CID 0711 FMI 07 Solenoid Valve (Auto Retarder Control) Improper Mechanical Response - Test
768C, 769C, 769D, 772B, 773B, 773D, 776C, 777B, 777D, 784B, 785, 785B, 789, 789B, 793, 793B and 793C Off-Highway Truck/Tractors and 771C, 771D and 775D Quarry Trucks Automatic Retarder Control (ARC) System CID 0711 FMI 12 Solenoid Valve (Auto Retarder Control) Failed - Test
836G Landfill Compactor and 834G Wheel Dozer Transmission Control
3512 and 3516 EUI Engines and 784B, 785B, 789B and 793B Off-Highway Truck/Tractors Exhaust Manifold