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ENGINE MANAGEMENT SYSTEM 5 DESCRIPTION AND OPERATION DESCRIPTION General The ECM is a full authoritative diesel specific microprocessor that also incorporates features for air conditioning. In The ECM processes information from the following input sources: • Mass Air Flow (MAF) sensor. • Ambient Air Pressure (AAP) sensor. • Manifold Absolute Pressure (MAP) / Inlet Air Temperature (IAT) sensor. • Engine Coolant Temperature (ECT) sensor. • Crankshaft Speed and Position (CKP) sensor. • Throttle Position (TP) sensor. • Fuel Temperature (FT) sensor. • Air conditioning request. • Air conditioning fan request. • Brake pedal switch. • Clutch pedal switch. The input from the sensors constantly updates the ECM with the current operating condition of the engine. Once • Air conditioning clutch relay. • Air conditioning cooling fan relay. • Electronic vacuum regulator solenoid. • Fuel pump relay. • Glow plug warning lamp. • Glow plugs. • Fuel injectors. • Main relay. • Turbocharger wastegate modulator. • Temperature gauge. The ECM interfaces with the following: • Serial communication link. • Instrument pack. |