Alternator Question
 

I noticed on the voltmeter in the car sometimes reads 12 to 13 volts. I wanted to know does the alternator have a sleep mode? I use to have a Honda and when the alternator would do a sleep type mode, it would stay at 12 volts until the electrical system demanded more voltage. So I wanted to ask. I am going to check the battery with the car on tomorrow with a DVOM ,but it mostly happens when I am driving. I wanted to check if anyone knows if it is the same type of alternator.

what does the gauge do when you have the rpm above 2k?

After it has been running for probably 30 minutes, it will be at 12-13 volts even at 2k. But for cold starts to about that time it will stay at 14 volts. That's why I thought it has a sleep mode. If I turn on the lights it will go to 14 volts but after a while go back to 12-13 with the lights running.