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  #25  
Old 05-03-2012, 12:06 PM
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Re: Charging System Light

I don't know about this smart alternator.
Since the charging update I have been monitoring the voltage while driving.
I am only seeing .2v deviation. 14.2v to 14.4v using a OBDII monitor.
If it was to go into a no charge state say under full acceleration the voltage should drop.
I tried this yesterday after the car was sitting for most of the day in the sun fridge running of the second battery takes about an hour to get it back to charged state. and charges at the same time as the car battery. So we got a full load on the alternator. Under full acceleration voltage did not change.
4 hours later running at 110kmh for that time. Tried again no variation.
My conclusion is the alternator will charge when it sees the battery needs it and floats at 14.4v. and will maintain that up hill down hill full acceleration full engine braking. After all we are not driving a hybrid.
Stop your car and just turn on the ignition check the voltage it will drop rather fast to 12.6v and then hold there.
If the alternator was to go into a non charge state or limp mode I would expect to see 13.8 volts or lower, but this has not been the state.
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  #26  
Old 05-03-2012, 04:29 PM
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Re: Charging System Light

Quote:
Originally Posted by Deserthucker View Post
I don't know about this smart alternator.
Since the charging update I have been monitoring the voltage while driving.
I am only seeing .2v deviation. 14.2v to 14.4v using a OBDII monitor.
If it was to go into a no charge state say under full acceleration the voltage should drop.
I tried this yesterday after the car was sitting for most of the day in the sun fridge running of the second battery takes about an hour to get it back to charged state. and charges at the same time as the car battery. So we got a full load on the alternator. Under full acceleration voltage did not change.
4 hours later running at 110kmh for that time. Tried again no variation.
My conclusion is the alternator will charge when it sees the battery needs it and floats at 14.4v. and will maintain that up hill down hill full acceleration full engine braking. After all we are not driving a hybrid.
Stop your car and just turn on the ignition check the voltage it will drop rather fast to 12.6v and then hold there.
If the alternator was to go into a non charge state or limp mode I would expect to see 13.8 volts or lower, but this has not been the state.
Hey Deserthucker

What OBDII meter do you have? I have a Scangauge II sitting in my top drawer that I used to have in the Jackaroo. I'm waiting to see if it works in GC as the Scangauge is supposed to support CAN and EOBD.
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  #27  
Old 05-04-2012, 10:23 PM
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Re: Charging System Light

I have a scangauge II permanently mounted on top of the steering column.
and borrow my mates PRO OBDII starscan with Detroit diesel software.
Gives you the basics but not the jeep stuff.
Would love to get hold of the jeep software for it.
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