你是真娘子還是假娘子? the PCM is constantly monitoring the engine load whe

你是加量子還是真量子? the PCM is constantly monitoring the engine load when engine is under running condition. When you turn on headlights, A/C, or heater, etc. the engine load will increase and the PCM will add a little more fuel and make the alternator to increase its output to meet the requirement. All modern car engine performance control will concern the any load change when its running to keep engine running smooth. hth.