Charging system issues

[Bdizzle]

I hope so trucks been there over a week now. From the sounds of it thats the only code that's showing up, they already did the pcm flash that didn't work so there's not much else they can try without replacing it.

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[airline tech]

FYI, I added an Edit to my last post.

Have you used Forscan to change tire size?
If so I am thinking that this is causing the code, others I believe have this code registering after they altered the tire size setting. (Going to bigger tires) and (speed odometer)

 

[Bdizzle]

I did repalce the Hankooks cause they started cupping at 25k replaced them with the same size wildpeaks though so I didn't have to change tire size.

 

[airline tech]

Any other Forscan changes?
The dealer will not be looking for changes from factory settings.

I just wanted to point that out, but I have seen others state the tire size changed kicked up that code,

As the code is not (SPECIFIC) to the charging system, it is programmed parameters (Mis-Compare)
So, if no tire change setting was done, then it appears to be solely related to the Tune and Flash Back

And the Charging System, issue would be completely separate and un-related, it just popped up at the same time and can mislead you to believe they are.
It appears the BMS sensor was the final fix for that issue.

However, it still can be related, but you would have some other codes with the P160A if the charging system (Control / Communication) is the root cause.
Something more that the Generic Code (P160A)
This is where (if) any communication codes are showing along with the P160A, will be the deciding factor to actually condemn the PCM.

 

[Bdizzle]

Nope never did anything with forscan on my truck at all. They said something about it looked like the code popped up about a month ago, thay was before i flashed it back to stock tune. As far as I know the p106a was the only code they said popped up not sure if there's anyway it wouldn't show or would be hidden or what.

 

[Bdizzle]

So heard back from the dealer they are going to find our anout doing a "PCM relearn vehicle application via FDRS" he just doesn't know the cost or how long it takes or anything so he said he'll get back to me and supposedly this will fix the data mismatch between then pcm and bcm

 

[airline tech]

I think that will fix it, as I have not dove into the (Tune) process and what actually gets altered in the programming.

I can say that the Code being generated is somewhat vague in the Troubleshooting of it.
It is not specific other than (Reprogram or Replace It)

From what I can tell is that (Error) relates to the PCM not seeing, Tire Size, Axle Ratio and Cruise Control Data from the other modules.
So, a part that programming was altered with the Tune. (Transmission Shift - Strategy)

The PCM dumped whatever it is looking for and now needs to be told (Relearned) what those parameters are.

With the help of (Google) it pops up sometime for owners who change the tire size ratio.
Some have reported if they change the tire size again (forcing a change) and then reselecting the correct tire size will correct the issue.
Basically, it forces a reset / relearn of it (Backdoor Way)
Clearing the Code will not fix this, it has lost the parameter, so you have to force it to learn it.

So, an alternate way of what they are going to do, is physically forcing a tire size change and then resetting it back to OEM (Stock) size.
This may or may not work but would be easier and cheaper avenue to try.
As with my Google search, that code appears to be related to the Tire Size input that the PCM is looking for.

Just curious, when were the Tires replaced?
Was it about (1) month ago, if so the TPMS relearn of tire position (MAY) have created this loss of information.
That is the only tie in (related) thing I see. If you don't have Forscan and (Zero) changes were altered.

Other than that, it is just an anomaly and the PCM somehow lost that input.

 

[Bdizzle]

got an idea of what it would cost for the dealer to do that ? He had to ask his boss about cost and didn't know how long it would take or what had to be done. Maybe i could mention that to them as a possible work arpund if the other method is gonna cost a lot. My tires were replaced probably 1.5 to 2 years ago. Seems like they are blaming it to my tune and my bed lights I put in for the code popping up and maybe it was also the cause for the charging issues too.

 

[Frenchy]

Generally speaking to do a simple factory flash program it is about 1 hours of labor. Thankfully Ford does not require the dealership to special order updated software

 

[Bdizzle]

Thats good to hear, so if they charge me for it looking at maybe 100 bucks or couple hundred. They did a pcm flash before but I guess this is something different.

 

[Frenchy]

Thats good to hear, so if they charge me for it looking at maybe 100 bucks or couple hundred. They did a pcm flash before but I guess this is something different.

That would most likely be it. Just depends on what terminology they decide to use

 

[Bdizzle]

They already did the pcm flash though that didn't fix it, this is something different but anything I look up makes it sound like it's similar kind of thing I think. Force it to do its relearn program or something

 

[Bdizzle]

They said 1000 bucks for it because they'd have to put a new pcm in case doing that to the old one could blank it and the truck would be bricked.

 

[airline tech]

Depending on where you hooked up the bed lights.

Did you connect the negative at the battery terminal or the opposite side of the BMS sensor?

Now this will only actually factor if the bed lights are set to operate with the factory bed light at the 3rd Brake Light. (Auto (On/Off) with the perimeter exit / entry lighting.
And how often you actually used the bed lights (with truck off)

The reason is the BMS sensor has to see a current draw from the battery to see the battery voltage has dropped.
If you connect at the battery terminal (itself) (-) side, the BMS sensor will not see it.

Any tie in to the battery itself for power. The (-) wire must be connected here or at the Body Ground
or the BMS (Sensor) will not see the current draw from the battery.

 

[Bdizzle]

They were just under the nut and no they were controlled by a controller in side they'd stay on unless you shut them off but right now I might be looking to trade the ranger in when I pick it up tomorrow maybe look at a maverick or I found a Tacoma too. Guess I learned my lesson to not tune again.

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