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ENGINE CONTROL SYSTEM EC-33 [VQ35DE] C D E F G H I J K L M A EC FUEL INJECTION TIMING Two types of systems are used. Sequential Multiport Fuel Injection System Fuel is injected into each cylinder during each engine cycle according to the firing order. This system is used Simultaneous Multiport Fuel Injection System Fuel is injected simultaneously into all six cylinders twice each engine cycle. In other words, pulse signals of FUEL SHUT-OFF Fuel to each cylinder is cut off during deceleration, operation of the engine at excessively high speeds or oper- Electronic Ignition (EI) System NBS004S4 INPUT/OUTPUT SIGNAL CHART *1: This signal is sent to the ECM through CAN communication line. SYSTEM DESCRIPTION Firing order: 1 - 2 - 3 - 4 - 5 - 6 ● At starting ● During warm-up ● At idle ● At low battery voltage SEF179U Sensor Input Signal to ECM ECM function Actuator Crankshaft position sensor (POS) Engine speed* 2 Piston position Ignition timing Power transistor Camshaft position sensor (PHASE) Mass air flow sensor Amount of intake air Engine coolant temperature sensor Engine coolant temperature Throttle position sensor Throttle position Accelerator pedal position sensor Accelerator pedal position Battery Battery voltage* 2 Knock sensor Engine knocking Park/neutral position (PNP) switch Gear position Wheel sensor Vehicle speed* 1 |