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System Description NBEC0015S02 SEF742M The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of N: 1,800 rpm, Tp: 1.50 msec A °BTDC During the following conditions, the ignition timing is revised by the ECM according to the other data stored I At starting I During warm-up I At idle I At low battery voltage I During acceleration The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed Air Conditioning Cut Control DESCRIPTION NBEC0016 Input/Output Signal Chart NBEC0016S01 Sensor Input Signal to ECM ECM function Actuator Air conditioner switch Air conditioner “ON” signal Air conditioner Air conditioner relay Throttle position sensor Throttle valve opening angle Crankshaft position sensor (POS) Engine speed (POS signal) Crankshaft position sensor (REF) Engine speed (REF signal) Engine coolant temperature sensor Engine coolant temperature Ignition switch Start signal Vehicle speed sensor Vehicle speed Refrigerant pressure sensor Refrigerant pressure Power steering oil pressure switch Power steering operation System Description NBEC0016S02 This system improves engine operation when the air conditioner is used. I When the accelerator pedal is fully depressed. I When cranking the engine. I At high engine speeds. GI MA EM LC FE AT TF PD AX SU BR ST RS BT HA SC EL IDX ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION Electronic Ignition (EI) System (Cont’d) EC-31 |