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How to Disable the PDC (for those who AutoX, Road Race, and have LSDs)

20K views 41 replies 18 participants last post by  G heinrich  
#1 · (Edited)
Have you felt your car tug at the steering-wheel in a way that felt like torque steer? Chances are, more than likely it isn't all torque steer. Ford designed a system to make our lives miserable, and it's called the Pull Drift Compensation. The car tries to detect divots in the road and fails miserably, leading to what feels like torque steer when driving hard when the car doesn't know how to properly compensate for the added horsepower and torque you're throwing at a system that wasn't designed to handle. Disabling this system makes the car much more predictable on the on ramps of highways, turning in, and low traction scenarios. So, now that you have a decent idea on what this system does, let's dive in.

What you'll need to do this:
  • A laptop with FORScan
  • An OBD2 ELM Cable or a bluetooth ELM cable
In order, here is what you will need to do:

1.Plug in/connect to the ELM OBD2 adapter you have either purchased, or already have.
2. Open FORScan, and click the plug to connect to your vehicle. (If you don't have a license, get a free extended license from their website, it lasts 2 months).
3. When this screen pops up, click yes to continue.
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4. When the screen pops up to make a new vehicle profile, do it, and save the backup to your hard drive.
5. It should now load all the control modules, and what we are going to want to focus on is the service procedures. It is the wrench on the left side, click it, and look for Disable Pull Drift Compensation. Shown below:
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6. Press the start button, make sure the steering wheel is straight, and let it run.
7. After that, your Pull Steering compensation has been disabled. You can later re-enable it by enabling it by hitting enable, and then resetting it (both will tell you to make sure the steering wheel is straight, so do that before you run the service program).
8. After that, hit the home page/vehicle information, and disconnect FORScan from the vehicle.
 
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#4 ·
Wondering, does this turn the TC/stability dash light on?
 
#5 ·
Did it for a guy yesterday, and there are no indicators that show up!
 
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#6 ·
WOW, if this really does what you say it does this is a great find! Can anybody else verify this works with no issues to other systems, etc???

This is a must for track days, just turn it off prior and turn it back on when done and back to the street!

@bobharly yes you do have an EDiff, this is not for an LSD.
 
#8 · (Edited)
Looks like you can do TPMS learning mode too, never saw that! Although I wonder if you still need the reset tool to activate the sensor? Perhaps this is the same as just doing the off-on-brake procedure or could it be the whole sha-bang? :unsure::unsure:
 
#9 ·
#10 ·
This is like discovering the God particle in Physics, I am recommending you for a Nobel Prize! 🏆
 
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#18 ·
I did turn it off for a guy, and he has no issues. That being said, I just went down another rabbit hole and found out something to change in the ASBUILT for the power steering control module. Pull drift compensation still could be useful, as it's the shaky steering wheel that will still be there after you get rid of torque steer. Working on another write up, but I found out it is possible to disable it in the as built.

Link for that is here

I will say, though, after driving his car it was a huge difference with the pull drift disabled, steering wheel was dead straight and the EDiff never engaged, he's running a 2867R Gen 2 with water meth and a wavetrack limited slip diff, and it had way less of the tugging on the steering wheel.
 
owns 2015 Ford Focus ST1
#17 ·
Stanger's be like "Why I Buy a Stang?" when I roll up past em wit my super spool K03!

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🤣
 
#19 ·
false alarm, unfortunately this doesnt turn off the ESC or TVC, i guess i read through too fast and it was pointed out on the RS forum this has been done for quite some time with another program. Anyway, it still may be helpful in certain conditions!

Disabling annoying stuff (PDC, FENG) with Daftracing VM
 
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#20 ·
#21 ·
I think you need to change the thread to Forscan PDC Disable!!
 
#23 ·
I have a few ideas still, but I have to delve into the As-Built to see, unfortunately the bits mentioned in F150 thread aren't available in the PSCM. Time to make a post on the FORScan forum :mad:
 
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#22 ·
I did not see any major issues with the eDiff at Daytona. Maybe I didn't drive it hard enough but I was only 2.5s off a Cobalt SS with Intake, Intercooler and Throttle body mods and mine is stock so I don't think I was slow rolling. I did run in track mode, 6 laps per session with 1 145-45 brake, 1 135-70 brake and 3 85-35 braking requirements each lap. With 35m cool down in between. I saw no boiling of the fluid or did I see the rears reach concerning temps for the HP+ pads. The fronts got pretty warm but still nothing concerning for the temp span that are optimal for the HP+. Maybe it was because Daytona has the long stretches of high speed to help cool. I guess Pocono and Sebring will tell more.
 
#24 ·
So my 2013 focus has lane assist? Sorry, what does PDC actively do?
I've always thought any pulling was due to my camber (-2.4 front, -1.3 rear), ride height, and poor road crown. Car has zero toe all around.

I've always chalked up any pull-drift fighting to the moderate camber up front. I would believe it if the car was interfering though.
 
#25 ·
So my 2013 focus has lane assist? Sorry, what does PDC actively do?
I've always thought any pulling was due to my camber (-2.4 front, -1.3 rear), ride height, and poor road crown. Car has zero toe all around.

I've always chalked up any pull-drift fighting to the moderate camber up front. I would believe it if the car was interfering though.
Not really lane assist, but it's intended to detect when the car is pulling one way or the other due to the road surface (such as a crowned road) and compensate for it. In theory it's a neat idea, in practice it tends to be too noticeable and I'd prefer it just not be there.

My 2016 ST is infinitely better than my 2012 ST (the first Ford used it, IIRC). So improvements have been made.

Any constant pulling will be due to alignment and such. It's not the EPAS doing that.
 
#27 ·
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Fingers crossed we can access the 730-01-02 bit of the PSCM here soon, if not there has to be some way to code it directly using a different interface other than FORScan :unsure:
 
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#32 ·
@rob99rt , I have a similar impression of the TB Performance Torque Gusset Bar. Easily did the most to help with wheel hop and torque steer leaps and bounds over just a RMM upgrade. I'm still on stock turbo, but even after 3 different suspension setups that gusset bar has been awesome! It's one of the 1st things I ordered when I had to get another ST. On the other hand, a rear shock tower support bar helped quite a bit to firm up the entire body structure. Always looking for that balancing act to play out ;)
 
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#33 ·
Question: I'm trying to run this and every time I get "Service procedure has been interrupted".

I'm going into PDSC and running the procedure to disable it. I only have one option in the ASBUILT and I'm not sure what post in that thread is supposed to be instructions on what needs to be changed ... just looks like a lot of folks posting the values for their F-150s.

Any ideas?
 
#35 ·
Alright ... so is it butt dyno or is the torque steer actually gone? After I put in the torque gusset bar it felt like it was better but there was still this tug to the right every time that I'd floor it in third.

With it turned off, there's no tug and the wheel stays straight better than ever. Hell, I was worried my "old age" was causing me to lose my ability to drive straight because I was always correcting ... and now I think it was just that stupid steering assist.

Am I nuts? The steering also feels lighter ... I need to sit on it for a night to really see but it feels vastly different. Better!
 
#36 ·
It isn't turning off the torque vectoring, but it does help if ford set the value too high. It tries to correct the steering for divets in the road, and it's not set by driving for whatever reason.

Have mine off, and have a tiny bit of torque steer now that I have the 2867R, but it could've been worse if it was improperly calibrated.
 
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#37 ·
It's such a difference. Wish I would've found this thread sooner. It's such a simple, quick and easy change too.

I don't see myself going back. It was getting old feeling something was tugging my wheel to the right anytime that I put the peTal to the meDal.

Maybe when the G25-550 and aux fuel goes in some slight torque steer will return but I'm OK with that. It seems like the problem was made worse with the PDC on -- like torque steer would kick on at a rate of 2 torque steer L and the steering would correct 4 torque steer R.

No more gripping the steering wheel for dear life trying to keep it in a straight line. Awwwwwwww yeeeaaahh! :D

Makes me wonder what other tiny mods are floating around that my year and a half of searching hasn't found (another good one is the adapter to add another OBDII port via the center gauge cluster ... mind = blown on that one too).
 
#38 ·
Updated to allow for the post to survive future updates that wipe the site of images.
 
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