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Author Topic: Gremlin in my ecu?  (Read 9195 times)

Offline s3dubbin

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Gremlin in my ecu?
« on: May 12, 2010, 05:50:16 pm »
EPC light came on last night on my s3 8p mtm330 7wks out of warranty so it went into audi this morning they are now telling me my ecu is buggered it is going back in tommorrow for a better look but more than likely they are going to reflash it back to 265bhp as they are not a mtm dealer, am i due any compensation for my £1000 mtm map as it seems to be a common fault in the bosch ecu? Any vw/audi specialists in the house that can shed some light on my situation? Cheers, Stevie.
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Saint Steve

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Re: Gremlin in my ecu?
« Reply #1 on: May 12, 2010, 05:57:01 pm »
Not the dreaded Furry animal in the Ecu!!!!

Our stealthwolf wont sleep tonight!!! :signLOL:

Sorry... forum joke mate.

Im sure one of our S3 owners will come along shortly to help you out fella. :happy2:
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Offline s3dubbin

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Re: Gremlin in my ecu?
« Reply #2 on: May 12, 2010, 06:05:44 pm »
Yip and the little blighter is hanging on in there not shiftin no matter what i fling at it! I hope so someone can help, nightmare!!!!
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Offline Poverty

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Re: Gremlin in my ecu?
« Reply #3 on: May 12, 2010, 06:08:34 pm »
if they find out your car is mapped, which they will if they interrogate it properly, then not only have you lost the 1k map but they will probably want to charge for a new ecu aswell.

Thats what SEAT would be doing anyway
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Offline s3dubbin

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Re: Gremlin in my ecu?
« Reply #4 on: May 12, 2010, 06:13:54 pm »
They know about my map the map is an audi map, they replaced turbo, clutch and steering rack all under warranty. The gremlin is not mtm gremlin it is deeper i think it is a bosch fault very common in skoda i hear.
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Offline Janner_Sy

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Re: Gremlin in my ecu?
« Reply #5 on: May 12, 2010, 06:21:35 pm »
never heard of it on briskoda mate
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Offline s3dubbin

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Re: Gremlin in my ecu?
« Reply #6 on: May 12, 2010, 06:33:01 pm »
I'm sure thats where i read about it.  :smiley:
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Offline PDT

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Re: Gremlin in my ecu?
« Reply #7 on: May 12, 2010, 06:45:24 pm »
other than the light, are there any symptoms? whats the fault codes?
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Offline s3dubbin

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Re: Gremlin in my ecu?
« Reply #8 on: May 12, 2010, 06:48:06 pm »
No symptoms its running fine. I'm sure the code was p0601?
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Offline cmdrfire

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Re: Gremlin in my ecu?
« Reply #9 on: May 12, 2010, 06:56:58 pm »
That's a faulty checksum isn't it?
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Offline s3dubbin

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Re: Gremlin in my ecu?
« Reply #10 on: May 12, 2010, 07:02:00 pm »
Yeah thats what it read? Way above my head.
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Offline PDT

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Re: Gremlin in my ecu?
« Reply #11 on: May 12, 2010, 07:35:06 pm »
That is the notorious checksum fault that we find in a lot of Bosch Me9 ecu's. a simple software update should solve it, if the car is on non original software then the software needs to be read and the checksum corrected before writing it back to the ECU.

A quick description of a checksum:

We see a man. He has a orange shirt, blue jeans and red shoes (I know, quite Belgian...). That is the data of ECU. Then he has a paper in his pocket, and it says "Belgian, orange shirt, blue jeans and red shoes". That is the checksum.
So we just need to check, whether the checksum and the ECU data match. If they don't, the checksum needs to be corrected accordingly.
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Offline cmdrfire

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Re: Gremlin in my ecu?
« Reply #12 on: May 12, 2010, 07:40:20 pm »
/offtopic, non-nerds please ignore

@PDT:
I had a strange issue with some of the electronics I'm developing, about two years ago. We incorporate a checksum to validate the data. What we were finding was under excessive noise conditions, the corrupt (random) checksum was once every so often coincidentally correct allowing garbage data to be read. It was an "infinite monkeys + infinite typewriters + infinite time = Shakespeare" type thing. Had to scratch my head to solve that one.
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Offline PDT

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Re: Gremlin in my ecu?
« Reply #13 on: May 12, 2010, 07:49:58 pm »
What were you developing? what type of 'noise' are you describing?
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Offline s3dubbin

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Re: Gremlin in my ecu?
« Reply #14 on: May 12, 2010, 08:07:12 pm »
Thanks for the explanation pdt, so i will lose my mtm and back to 265bhp with original software??? Or can the broken bit be re-written in the ecu keeping the mtm?
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