CYLINDER GP 5P5201 - Caterpillar

Figure 1.2 - Electronic GovernorElectrical System Block Diagram
Figure 1.3 - Electrical System Block DiagramSystem Component Diagrams
Figure 1.4 - Engine View - Left SideSystem Component Diagrams
Figure 1.5 - Engine View - Right SideSystem Component Diagrams
Figure 1.6 - Engine View - FrontElectrical Connectors and Functions Electronic Service Tools
Caterpillar Electronic Service Tools are designed to help a service technician obtain and analyze data, and to diagnose existing and potential problems within the electronic system. An Electronic Service Tool is required to perform calibrations and to read or change programmable parameters.There are two Caterpillar Electronic Service Tools that can be used with the engine: Electronic Technician (ET) or the Electronic Control Analyzer Programmer (ECAP). With either ET or ECAP, a Communication Adapter Tool is required to communicate with the Electronic Control Module (ECM). ET is the preferred Electronic Service Tool since it has more capabilities and features, however, ECAP may be used to perform basic troubleshooting procedures.A digital multimeter is required for making voltage and resistance measurements. There are also several required adapter cables, probes, etc, that allow a service technician to perform the measurements and readings needed for diagnosis. These tools are listed in the following tables and diagrams, along with their associated part numbers. Optional Service Tools
Two short jumper wires are needed to check continuity of some wiring harness circuits. The jumper wires are used to short (connect) two adjacent pins or sockets together in a connector. Refer to the Service Tools Diagram for details on how to construct the jumper wires.A long extension wire may be needed to check continuity of some wiring harness circuits. Refer to the Service Tools Diagram for details on how to construct the extension wire.The following list contains service tools that are not required, but may be helpful, to service the engine. Electronic Technician (ET)
The Caterpillar Electronic Technician (ET) is a service tool designed to run on a personal computer. It allows a portable computer to display sensor data (temperatures, pressures, etc), view and clear active and logged diagnostic codes, display the current ECM configuration, perform diagnostic tests, and perform calibrations.
Figure 1.7 - Portable Computer Based ETConnecting ET And The Communication Adapter Tool
The Communication Adapter Tool operates on 24 VDC supplied by the battery. Use the following procedure to connect ET and the Communication Adapter Tool to the engine.1. Turn the keyswitch to the OFF position. If the keyswitch is not placed in the OFF position, the engine may start and run.2. Connect the 139-4166 cable between the Engine Service connector (J42, 9-Pin gray plastic Deutsch) and the Communication Adapter CONTROL connector.3. Connect the 7X1425 cable between the laptop RS232 serial port and the Communication Adapter SERVICE TOOL connector.4. Turn the keyswitch to the ON position, engine OFF to begin testing. The ET and Communication Adapter Tool will operate with the engine running or with the engine off (keyswitch ON). If ET and the Communication Adapter Tool do not communicate with the ECM, refer to P-307: Electronic Service Tool Will Not Communicate With