Transmission (TCM) upgrades????

Lowblow said:

I was combing through the hmaservice.com website and took a look at the ECU upgrades section. It listed all the ECU upgrades releases for various Hyundai cars.

Here are the upgrades I saw for the Genesis (sorted by the most recent):
#178 BH 3.8 ECM UPDATE
#148 BH 4.6 ECM Update (DTC P0456 Logic)
#147 BH 3.8 TCU IMPROVEMENT
#143 BH 4.6 TCU UPGRADE FOR A/S PART
#138 BH ACU UPDATE
#111 BH 3.3/3.8 P2135 AND P0638 DTC LOGIC

No dates for the update releases were given, just ID numbers.

It seems to me there were two transmission control unit upgrades, one for the 3.8 and one for the 4.6.

Can anyone make sense of this for me? Could this contain the update some of you have been looking for (transmission hesitation, lack of overdrive, etc)? Are these just updates to bring the 09 models up to 10 spec? Do you think my dealership would know how to upgrade my TCU (so far they've been clueless about everything)? Anyone know what an ACU is? Any thoughts?

I saved the web pages to a pdf:
http://www.filesavr.com/BwtbYgg1

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Lowblow said:

Here are the upgrades I saw for the Genesis (sorted by the most recent):
#178 BH 3.8 ECM UPDATE
#148 BH 4.6 ECM Update (DTC P0456 Logic)
#147 BH 3.8 TCU IMPROVEMENT
#143 BH 4.6 TCU UPGRADE FOR A/S PART
#138 BH ACU UPDATE
#111 BH 3.3/3.8 P2135 AND P0638 DTC LOGIC

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• do not use cruise control for two weeks.
  
• remember that this adaptive learning mode does not change the gearing ratios (dammit).
  
• must move your right foot as if it was moving in super-slow motion. Easy on... easy off.
  
• Drive like you want the transmission to behave... use the shift-tronic if you want it to learn specific speed/shift associations.
  
• realize that if you still don't like it after two weeks, have it erased again and try again with a different driving pattern/strategy.

Lowblow said:

So, some major revelations at the dealership yesterday.

1) There were ECU and TCU (transmission) upgrades for both V6 and V8 models. Since my build date was so recent (Feb10), my computers(?) are up to date. BTW: I never had any of these "hesitation" problems so maybe a new flash is the way to go for some of you.

2) My dealer has the ability to wipe out the "cumulative adaptive transmission data" that my drive train has accumulated so I can start a new learning cycle. I had this done and, whoa... what a difference! I guess my transmission is a baby again. I'm teaching it everything again.

3) When re-programming your transmission TCU, you should do the following:

• do not use cruise control for two weeks.
  
• remember that this adaptive learning mode does not change the gearing ratios (dammit).
  
• must move your right foot as if it was moving in super-slow motion. Easy on... easy off.
  
• Drive like you want the transmission to behave... use the shift-tronic if you want it to learn specific speed/shift associations.
  
• realize that if you still don't like it after two weeks, have it erased again and try again with a different driving pattern/strategy.

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Gabe said:

After reading this thread, I called up my dealership and talked to my service advisor and told him about this thread with the ECU updates and TCU updates.

He said he would look for any updates under my VIN#. I gave it to him and he said the only thing that came up was a recall for a airbag module or something like that?

He said he was suprised my car didn't have this recall done yet?

But nothing came up under the TCU update for my VIN?

Is there anything else I should've asked him?

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Gambler said:

What is the build date of your car?

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Gabe said:

After reading this thread, I called up my dealership and talked to my service advisor and told him about this thread with the ECU updates and TCU updates.

He said he would look for any updates under my VIN#. I gave it to him and he said the only thing that came up was a recall for a airbag module or something like that?

He said he was suprised my car didn't have this recall done yet?

But nothing came up under the TCU update for my VIN?

Is there anything else I should've asked him?

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Gabe said:

But nothing came up under the TCU update for my VIN?

Is there anything else I should've asked him?

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ASHDUMP said:

Thanks for the response LowBlow. I actually found the information on the HMA website so I'll show my dealer when I go there. I've seen them on the exact same system....

@Gabe- I have a feeling you're going to have to tell your dealership that your tranny is acting very funny.... explain how and what feels wrong. Then tell them that you have access to the same information they do and there are updates that need to be done. Basically hold their hand.... Inputting a VIN number does absolutely nothing for TSB or anything of that sort. For instance the "telescoping steering wheel" TSB wouldn't show up if they just inputted your VIN.

I'll make a phone call either Monday or Tuesday.... I think my tranny is legitimately messed up. I'd like to start from zero if possible.

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ASHDUMP said:

LowBlow -

I just called my dealer and walked him through the website. He didn't know what those #'s were all about and didn't seem like he wanted to look into them at the moment. Did your dealer know right off the bat what they were or did they need to make some phone calls to Hyundai Engineers? I'm bringing my car in on Monday of next week to have them look into my transmission.

Thanks,

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Lowblow said:

My adviser knew right away that the "BH" designation was for the Genesis. He knew what the "DTC P0456 Logic" upgrade was about. It was for how the ECU handled diagnostic information regarding the evaporator module. It's an OBDII (on board diagnostics) code.

http://www.obd-codes.com/p0456

He couldn't tell me what the other things were and that he would have to call Hyundai. I told him not to bother and just give me the latest upgrades. After the tech tried to, that's when I was told that I already had them.

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ckon said:

What's your car's build date? TIA.

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Lowblow said:

Driving home from the dealership the trans was very jerky. Later that day, it had calmed down. Today when I went to the movies, it was almost back to normal. After two weeks, I'll update everyone on my results. I can't wait till I get to use my cruise control again.

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Lowblow said:

UPDATE ON MY PROGRESS:

It's been a month now since the tech erased the adaptive data on my TCU and I can say that everything is completely normal again.

Acceleration changes: My acceleration shifting has always been excellent and exceedingly smooth so I've never had a problem with it. I'd say it's exactly back to where it was before.

Deceleration changes: The downshifting and engine breaking are now better!! However, the changes are not significant, I'd say it's about 15% better, but it is noticeably better.

My main problem (it's never bothered me too much) was the lack of overdrive (coasting) from 4th gear down (something we can't change). The shift down to 4th gear was always a bit jerkey for me. The effect is more muted now and I'm so glad I went in to get my adaptive data zapped. I'll admit, when I first got the car, I drove it rather vigorously which could explain the prior programming, but I'll never know.

Things I learned:
a) It took about three weeks for everything to get back to normal.

b) I tried telling my trans that I wanted to coast by putting it into neutral during coasting situations... there was no immediate or gradual effect that I could tell. Though my end result was positive, I'm not sure if putting into neutral contributed to the result.

c) The decel jerkiness changed on me suddenly. While reprogramming the adaptive data, the jerkiness was there one minute, and then it vanished. It didn't happen gradually. Strange.

d) When reprogramming the accel, I would engage cruise @ 45mph going into a stop signal. I would then brake into the intersection. When the light turned green, I pressed "RES" and let the car smoothly accelerate me back to 45. I figured the transmission itself would know the smoothest shift points so I let it program itself. Very meta, I know.

e) Was it all worth it? Yes... at the very least, I learned a ton about my car. In addition, I got a slight improvement in smoothness.

I hope this helps some of you.

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