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EC-36 < SYSTEM DESCRIPTION > [MRA8DE] SYSTEM SYSTEM DESCRIPTION The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the ECM memory. The program value is preset by engine operating conditions. These conditions are determined by input signals (for engine speed and intake air) from the crankshaft position sensor (POS), camshaft position sensor (PHASE) and the mass air flow sensor. VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION In addition, the amount of fuel injected is compensated to improve engine performance under various operat- ing conditions as listed below. <Fuel increase> • During warm-up • When starting the engine • During acceleration • Hot-engine operation • When selector lever is changed from N to D (CVT models) • High-load, high-speed operation <Fuel decrease> • During deceleration • During high engine speed operation *1: ECM determines the start signal status by the signals of engine speed and battery voltage. JSBIA2812GB |