Using Forscan to change Battery_Type | Page 2 | Ford Explorer Forums - Serious Explorations

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Using Forscan to change Battery_Type

Remember that the PID for battery current is a net change, not an absolute. A value near 0 isn't necessarily an issue. What does it show KOEO? IIRC, it should be -20A or so. You seem to understand the theory and operation of this well--is this immediately after start or sometime thereafter when the charge has recovered?

if it's still showing 0, I'm still coming back to the hall effect sensor having issues. Take a picture of your physical battery setup including the sensor assembly, if you could. Is there a chance the sensor isn't attached right to the rest of the assembly?

FWIW, I'm also not dismissing that you need to update your BCM charging strategy for an AGM setup, but I'm still disconcerted about the way that PID is coming back...

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Thanks (again!)

So, to answer your question, I took that shot after approx 30 mins of driving. I actually waited longer just to wait until it went from 2, 1, to 0.

For KOEO, confirming that it sits around -20 as 'default". When I first started looking into this, I did check that there was some expected fluctuation by, for instance, flicking on high beams - there was.

This also throws me:

This aside though, it is still an issue for me that the Battery_Type is set to an 80Ah AGM battery as this must affect the way the battery charge state is calculated. I have a 110Ah Lead Acid

Is this setting the one that was on the car stock, or after playing with it with FORScan? No Explorer in your model years that I know of -- hell to this point even -- came AGM, so I'd bet that FORScan interpreted the value wrong if the value was how it appeared 'stock.'

Also, are there any DTCs in the PCM, BCM, or APIM?

FYI, I'm stuck with measuring the current. I only have a cheapo clamp to hand and it's AC only - so now I can't easily check the hall effect sensor. I do have a big shunt in a box some where so I could still measure this but I'm not in a rush to go searching for it right now.

When I got the car it had the "standard" lead acid battery in it and the first thing I did was pull it out and replace for one with greater CCA. To my knowledge, it's never had an AGM in there.
Also, to further clarify, I have only seen this value displayed by forscan and not another. Also, I haven't modified it. If I knew how to, I would! ;)

Confirming, no DTC's.

The devil in me might just have me disconnect the hall sensor and see how that affects both the charge rate and the state of charge...

Tomorrow I will pull that PID and see what it says for me.

Per workshop manual for my 2017, if you disconnect the hall effect sensor it should trigger a DTC which will fault out (and disable) the advanced charging strategy for a more traditional calculation method. The SoC PID will probably get ignored.

I also reviewed the WSM for a troubleshooting strategy on the 3.5L NA; going down the path they say you should look at connector C139 for fitment--I will try to post a diagram pic.

Edit: Diagram pic

Connector C139.PNG

Really appreciate that, thanks in advance.

I like the idea of disabling the "advanced charging strategy" :) I'm an old school guy and never had any charging problems in the pre-fancy-ECM-days! It actually annoys the !@##$ out of me that something so simple needs to be so complicated. For instance, when the charge state is on 37%, the moment you put the key in the ignition, the dash turns on and immediately gives the warning of shutting down due to low battery.

No problem.

It's actually a pretty cool system--I'm not sure what the impact is, but it's all about fuel economy--and to an extent battery wear (when it works.) Having seen it in action and monitored the PIDs, I've been impressed with what Ford engineers have accomplished in the strategy. Don't give up on this yet!

Just to chime in, I've never had a starting issue with the OEM battery, even in the coldest temps here in the Ottawa area. I've also never used the block heater that comes with the vehicle. I do park in my garage but that doesn't make much of a difference when it is -20C.:)

@stuarto -- I'm sorry, I tried to pull the BATTERY_TYPE PID but it doesn't appear to exist on my 2017. I checked all modules, couldn't find it.

Thanks and really appreciated. It's probably gonna be the weekend until I have time to check the connector now

Hey folks,
I took another look at this today. Why not, it's only -20c after all!

I am surprised to say that I am now wondering with the battery state was actually being reporting accurately. Although I was inclined to disbelieve the state could drop to about 30% after a few days, after a BMS reset, I may have found the start of a culprit - ridiculous parasitic current drain. I'll start a new thread on this so as not to merge different topics.

Happy New Year!

My guess is that the battery type controls the alternator regulator. AGM batteries use a different charging curve than flooded batteries, and there may be different curves for the other flooded battery types. The charge curves allow for temperature compensation as well as getting the right charge based on chemistry. I know for some HD commercial applications, the regulators we use have a setting for flooded and a setting for AGM. Resetting the BMS is necessary for the PCM to recognize a new battery is installed. I've also left a de-sulfating maintainer on the battery for months during storage.

This isn't required on a 2013 as in your profile(2011-2015 don't have this type of BMS), but the 2016-2017 do have specific battery settings and require a BMS Reset when changing the battery.

Please see the tab "Battery Settings" on my spreadsheet if you do have a 2016-2017

FORScan 2011-2018 Explorers

Here is the reset procedure for your 2013:

2011-2015 Battery Relearn Procedure

Because your vehicle’s engine is electronically controlled by a computer, some control conditions are maintained by power from the battery. When the battery is disconnected or a new battery is installed, the engine must relearn its idle and fuel trim strategy for optimum driveability and performance. To begin this process:

1. With the vehicle at a complete stop, set the parking brake.
2. Put the gearshift lever in P (Park), turn off all accessories and start the engine.
3. Run the engine until it reaches normal operating temperature.
4. Allow the engine to idle for at least one minute.
5. Turn the A/C on and allow the engine to idle for at least one minute.
6. Drive the vehicle to complete the relearning process.
Hi there, do you have this spreasheet still available? the link seems to not work. I am trying to upgrade my 2017 explorer to an AGM battery from costco with a 750 CCA rating. thank you

Hi there, do you have this spreasheet still available? the link seems to not work. I am trying to upgrade my 2017 explorer to an AGM battery from costco with a 750 CCA rating. thank you
I just updated the link in the post

Just tried it and it isn't working.