Engine Operation 38 UENR0623-02 Sensor Locations for the Clean Emissions Module Illustration 32 g02738216 Typical view of the sensor locations (18) Diesel Oxidation Catalyst (DOC) inlet temperature sensor (19) Diesel Particulate Filter (DPF) inlet temperature sensor (20) Inlet connection for the DPF differential pressure sensor (21) Outlet connection for the DPF differential pressure sensor ECM The Electronic Control Module (ECM) (1) functions as a governor and a computer for the fuel system. The ECM receives signals from the sensors to control the timing and the engine speed. The electronic system consists of the ECM, the engine sensors, and inputs from the parent machine.
The ECM is the computer. The personality module is the software for the computer. The personality module contains the operating maps. The operating maps define the following characteristics of the engine: Engine rating Torque curves High and low idle speed (rpm) Emissions Injection timing Passwords restrict changes to authorized personnel. Refer to Troubleshooting for more information on the passwords. Illustration 33 g02722357 Typical example The ECM has an excellent record of reliability. Any problems in the system are most likely to be the connectors and the wiring harness. The ECM should be the last item in troubleshooting the engine.