ReBeL50V8

So after doing some forscaning, my auto start/stop won't kick in due yo vehicle charging. I was only in there for about 30 mins with the key in the on position. I let the truck run in the am everyday for about 30 mins in the driveway with the heat up. I take the kids to their grandparents so one can go to school and I drop the other at day care and at 5 am it's chilly. So I get the truck toasty for the little humans.. going on day 5 or so maybe a tad longer of doing this and it still hasn't caught up to charge.. my question is...i did enable the battery monitoring as for some reason my truck wasn't enabled. Could that be the culprit.? I'm going to try n get some time to put a tester on it and check some voltage. But I don't see why it won't charge.. alternator? Any one else experience something similar after sitting doing some forscan?

CNY_17SE

i had the same size tire on my 2010 and it actually made the Speedo more accurate than the stock tire due to the minor size difference. I wouldn't even chance it.

Added benefit is that your odometer will advance a little bit slower due to the larger circumference of the tire and it will show less(by a very miniscule amount) miles than actual when it is trade in time.

Apples

While this may or may not be FORScan related (my post and your issue), I would suggest that the batteries in our trucks are "behind the 8 ball" to begin with, with the demands placed on them by the ever-increasing available options and features.

Before your latest FORScan programming, did you start with a 100% full battery? When was the last time your truck's battery was 100% charged? It wouldn't be too far off the mark to say, "We don't know." Couple this to winter time, more time spent with lights on, and a lot of short trips... there's no time for the batt to fully charge.

I have a '16 XLT, with an XL-level of options: none. Even then! my truck's battery needs to be topped off from time to time. I should do that more than I do. I use a good 3-step "smart" charger. A microprocessor-controlled charger.

I know this all sounds like some obscure battery jibberish, but, trust me; it ain't. Batteries like to kept full. Look up Peukert's Law. While Peukert's theorem deals more with a high amp draw, you get the idea. There are several other links in there such as one to Battery Stuff dot com. Worth a read.

Gordy49913

If your wondering if its the Forscan change, reverse the change, see if it makes a difference. If the alternator was not charging, the truck eventually would either not start or would die out on the road, if your headlights were on it would even be faster.
1. winter time is also here, it puts a bigger load on the battery.
2. the battery is getting older.
3. are your trips short?
4. idling just keeps up the battery, the rpm's need to be up in order to charge.
The owners manual lists the many things that can cause auto start/stop to not function.
Also turning things on such as Battery Monitoring, your truck may not be equipped with it, when you turn it on the computer systems may see it on and try to function without a missing sensor. So you could be getting this error. Usually it doesn't bother anything.
You could also hook up to the truck again with Forscan and look at what DTC's the truck is putting out.
Turning things on with Forscan doesn't mean it exists in your truck. You may need to add parts in order for it to function.

ReBeL50V8

I'm going to hook back up tomorrow and return it to as built and see but for now I grabbed the dtc

kbroderick

[QUOTE=Livnitup;5575094]...The heated seat lights stayed on constantly and depending which one I pushed, the defroster would light up or A/C buttons would turn on/off. The climate/seat buttons on the Sync 3 screen didn't jive with what was illuminated below on the actual switches either. .../QUOTE]

Can we call this the 60s-Brit-car-electrical mod?

No, but really, thanks for being a mad scientist for this stuff and using your own equipment to guinea pig it.

JBowen77

I’m trying to figure out how to turn the hazard lights on without the switch via a pid , anyone have a direction you can point me in on finding this code?

Mlarv

Reset the DTC first and see if it continues. I had similar ones on mine cleared them, and they have not returned.

digitaltrucker

From what I have read here and unless it has changed, it has been said here before that our charging systems dont charge like old systems, to 100% i believe.

Thats why one suggestion is when doing forscan, connect a battery charger to the truck.

Gordy49913

I have a voltmeter installed in my truck, the voltage is all over the place. With the colder temperatures, when I start the truck the voltage is around 11.8 before I turn the key. Once its running, sometimes its 14.3 volts, then 14.8, when I came home last night it was 15.2 volts. The voltages don't seem to change according to the load. I should record voltages. The volt meter is only active when the key is on.