Terrain management upgrade?

RedlandRanger

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Took my Ranger in for service. Now the Terrian Managment doesn’t work. I ask my service advisor about it. She the PCM was updated, because the truck didn’t come with it there is nothing they could do about it. I get a trouble code in the IPC on Forscan that is OU439:83-82. Any information would be helpful.
Did you try re-doing the FORScan tweak that enabled TM? ( IPC and enabled select drive mode.) My first guess is that they re-flashed the PCM with what the factory said it should be, which disabled TM. Then, when it starts up it sees the TM switch which is what is throwing the code. But that is totally a guess. It would be interesting to see what happens if you re-enable the tweak.

If you did and you said that I apologize. If that is what happened, my guess is that Ford closed a hole in the software. Might have been a bug that enabled it by accident.





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pgilbert

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This is troublesome! Anyone?
It would be troubling if this was intentional by the dealer. I would think it's an independent dealer thing - I have had my Ranger in after making various changes and my dealer has never changed anything back nor made any comment!
 

Michael Crowe

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I tried to forscan and it still doesn’t work. If Ford did this with the updated pcm, that is wrong. All I can do is try a new TM control in case something happend to it. I don’t want to spend that kind of money and it not work. I wish I new how to test the TM control.
 

James Caper

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If you had a backup of your PCM and you restored it would that not fix this?
 

James Caper

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Did you back up before you made the TM change and after. If you restore to before it should overwrite the pcm back you your default and then make the TM change
 

Rick - Saber

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@Michael Crowe Have you pulled the switch out to look at it? Maybe they went sneaky and disconnected a wire or two for the TM part.
 

Michael Crowe

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Can some send me a picture of the connection so I can compare wires.
 

James Caper

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Not putting my sons in til 25 Dec 2020 so if you don't get one by then let me know.
 

tugger50

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I finally got my TM knob and installed it this morning. It all works as advertised. Thanks to everyone on the forum for the explanations and videos. It helped a lot .
 

TechnicallyReal

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Have to say snow mode is a huge difference!
Came to say this as well. It reduces the throttle sensitivity and torque a bunch giving a lot more control on slippery roads. Seems to increase the sensitivity of TCS and ABS as well
 

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