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MULTIPORT FUEL INJECTION SYSTEM EC-37 < FUNCTION DIAGNOSIS > [VQ40DE] C D E F G H I J K L M A EC N P O MULTIPORT FUEL INJECTION SYSTEM System Description INFOID:0000000001366288 INPUT/OUTPUT SIGNAL CHART *1: This sensor is not used to control the engine system under normal conditions. *2: This signal is sent to the ECM through CAN communication line. *3: ECM determines the start signal status by the signals of engine speed and battery voltage. SYSTEM DESCRIPTION The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION In addition, the amount of fuel injected is compensated to improve engine performance under various operat- <Fuel increase> • During warm-up <Fuel decrease> • During deceleration Sensor Input Signal to ECM ECM function Actuator Crankshaft position sensor (POS) Engine speed* 3 Piston position Fuel injection Fuel injector Camshaft position sensor (PHASE) Mass air flow sensor Amount of intake air Engine coolant temperature sensor Engine coolant temperature Air fuel ratio (A/F) sensor 1 Density of oxygen in exhaust gas Throttle position sensor Throttle position Accelerator pedal position sensor Accelerator pedal position Park/neutral position (PNP) switch Gear position Knock sensor Engine knocking condition Battery Battery voltage* 3 Power steering pressure sensor Power steering operation Heated oxygen sensor 2* 1 Density of oxygen in exhaust gas Air conditioner switch Air conditioner operation* 2 Wheel sensor Vehicle speed* 2 |