S/S stopping but not re-starting

[airline tech]

This is what I have read. And below is what Ford states in their manual......

If the reset is not carried out [using a scan tool] it takes approximately 8 hours for the BCM to learn the new battery state of charge. During this 8 hour period, the vehicle must be undisturbed, with no doors opened orkeyless entry button presses. If the vehicle is used before the BCM is allowed to learn the new battery state of charge, engine off load shedding can still occur and a message may be displayed.

It is my understanding of the system can learn the new SOC, (The rest period- untouched)this is the same as placing the battery on a charger but however the charging algorithm will still be set to the old battery, I am determining this by - resetting the BMS - resets the time since installed date ,which in turn also forces a SOC recalibration. ( Programed Data-new battery)
The BMS reset is the only way the BCM is told (knows) a new battery has been installed, or a (self force reset) to possibly fix charging (battery) issues and still using the old battery.
To clarify, a BMS reset will show in PID data for the Battery- Time since installed (current date) on when you did the reset.
The charging algorithm will adjust to a new battery and charge accordingly (this algorithm ties into the Battery IR) as it ages the IR increases, and with the help of the desulphator , this keeps the IR in the low range.

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[DukeCanBuildit]

A 2019 Ranger with what appears to be a battery on its way out in 2024 - huh, that ain’t too bad given what we know.

Seriously, I hope it’s not more than just a battery failing. Good luck!

 

[Dsc]

The BMS reset is the only way the BCM is told (knows) a new battery has been installed, or a (self force reset) to possibly fix charging (battery) issues and still using the old battery.
To clarify, a BMS reset will show in PID data for the Battery- Time since installed (current date) on when you did the reset.

I fully agree that a BMS reset is required with a battery change. As you stated the BCM needs to know it's a new battery.

 

[TJC]

It is my understanding of the system can learn the new SOC, (The rest period- untouched)this is the same as placing the battery on a charger but however the charging algorithm will still be set to the old battery, I am determining this by - resetting the BMS - resets the time since installed date ,which in turn also forces a SOC recalibration. ( Programed Data-new battery)
The BMS reset is the only way the BCM is told (knows) a new battery has been installed, or a (self force reset) to possibly fix charging (battery) issues and still using the old battery.
To clarify, a BMS reset will show in PID data for the Battery- Time since installed (current date) on when you did the reset.
The charging algorithm will adjust to a new battery and charge accordingly (this algorithm ties into the Battery IR) as it ages the IR increases, and with the help of the desulphator , this keeps the IR in the low range.

Based on what you report, it may be wise to reset the BMS when the onboard desulfator is installed and when IR is <5 mOhms.

I wish I could see the BMS source code in order to know exactly what parameters are being monitored, threshold range settings, and actions triggered when thresholds are exceeded.

Right now we are all making best guesses. And I simply do not trust Ford to have my best interests at heart. They have made significant compromises to these trucks due to Federal regulations that to me seem counterproductive and needlessly expensive.

I am very close to simply unplugging the BMS sensor again, and forgetting about it. My 2005 Ranger is much easier on batteries, but it also doesn't have the load requirements the 2020 has. I have turned most of that stuff off, but it still has a big dark current draw compared to my 4G Ranger.

 

[Bobby-C]

This is what I have read. And below is what Ford states in their manual......

If the reset is not carried out [using a scan tool] it takes approximately 8 hours for the BCM to learn the new battery state of charge. During this 8 hour period, the vehicle must be undisturbed, with no doors opened orkeyless entry button presses. If the vehicle is used before the BCM is allowed to learn the new battery state of charge, engine off load shedding can still occur and a message may be displayed.

I'm not sure about a reset, haven't change my battery yet.

 

[19silversport]

So dealership couldn't start vehicle, then was able to. Checked a bunch of sensors and said all was checking out fine. I told them to keep it overnight and drive it allowing the s/s to work.
Recd message today that they found an issue with a "wiring concern". I asked if the ESP covered it and was told no because a part would have to fail to be covered ?‍
So $250 Diagnostic fee and an hour of labor to fix

The wiring harness for the powertrain control module had an open circuit so they had to repair it

 

[Big Blue]

So dealership couldn't start vehicle, then was able to. Checked a bunch of sensors and said all was checking out fine. I told them to keep it overnight and drive it allowing the s/s to work.
Recd message today that they found an issue with a "wiring concern". I asked if the ESP covered it and was told no because a part would have to fail to be covered ?‍
So $250 Diagnostic fee and an hour of labor to fix

The wiring harness for the powertrain control module had an open circuit so they had to repair it

So, now a wiring harness is not a part? Sounds like a loose use of semantics to get out of paying. I wonder if the ESP contract specifically excludes wiring issues? Those can be some of the most difficult (expensive) to find.

 

[19silversport]

I agree. When I questioned what the "wiring concern" was, was told it was an open circuit and because the part didn't fail, was not covered by ESP.

I don't know ow what an open circuit means or how you'd "close" it if something didn't fail

 

[alcohenusa]

I agree. When I questioned what the "wiring concern" was, was told it was an open circuit and because the part didn't fail, was not covered by ESP.

I don't know ow what an open circuit means or how you'd "close" it if something didn't fail

If you have the Ford Protect ESP, then wiring harnesses are covered under PremiumCare, ExtendedCare and BaseCare. See this link and expand the Electrical section.

https://fordprotect.ford.com/extended-service-plan

 

[airline tech]

I agree. When I questioned what the "wiring concern" was, was told it was an open circuit and because the part didn't fail, was not covered by ESP.

I don't know ow what an open circuit means or how you'd "close" it if something didn't fail.

It appears that by your description, they found a bad wire (damaged-broken-bad connection) between the PCM and the DC/DC Convertor.
This is the (Start Signal Wire) - If current cannot flow on the wire from point A to B it is considered an OPEN circuit.

 

[19silversport]

Each time I've started vehicle the radio defaults to AM 1 preset 2. Wtf. I tried the push power button and >> at same time reset but no change.

I know it's off topic for this thread, but any ideas?

 

[alcohenusa]

Each time I've started vehicle the radio defaults to AM 1 preset 2. Wtf. I tried the push power button and >> at same time reset but no change.

I know it's off topic for this thread, but any ideas?

What build of Sync3 do you have? If less than build 23188, you need to update.

 

[airline tech]

If not Sync Version, related.
Have you reprogramed the station presets; they most likely had the DC/DC Module connector off to do the wire repair. That connector feeds the BCM circuit for the APIM (Sync) power and likely wiped all memory (presets)

 

[19silversport]

If not Sync Version, related.
Have you reprogramed the station presets; they most likely had the DC/DC Module connector off to do the wire repair. That connector feeds the BCM circuit for the APIM (Sync) power and likely wiped all memory (presets)

Nope, all presets are still there. Only other changes was the clock was 24jr and not 12, so an easy change back.

I'll check sync version when I'm done work

 

[19silversport]

What build of Sync3 do you have? If less than build 23188, you need to update.

V3.4
Build 22251_product

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