ETM software update - what does the software do?

DSK · May 13th, 2007, 09:31

Many of us have had the ETM software updated and the unit cleaned out at the dealers. Having read on one of the ETM issue threads, the updated software simply slows down the failure of the ETM, got me thinking, does anyone know what the i) old software did and ii) what the new updated software does?

Lastly, as the ETM software to some degree communicates with the gearbox software (thats what the Volvo mechanic said), is there a possibility the existing gearbox software will also require an update to work correctly with the updated ETM software?

T-5ones · May 13th, 2007, 14:02

If you have a search around on the net, you will find out how the ETM sensor "fingers" wear out the carbon tracks at the lower end of the rev range. One of the things the new software does is up the revs a bit at idle to keep the sensors off the worn areas of the carbon track.

The software also slightly desensitises the rev demand to omit the rev "bounce" which is also associated with the problem.

I am not technically minded and someone else will hopefully be able to give a more specific answer.

Zota · Jul 19th, 2007, 07:44

The worn track on the ETM potentiometer causes "noise" which confuses the engine computer. It appears that they have increased the time before the engine computer signals an error.
As the wear gets worse there will come a time when the engine will start surging as others have reported here.
I have had the sodtware mod done and so far so good.However, I know I am on borrowed time. It is not a fix, just a cover up.

BTW my engine idle speed was not changed.

roys v · Jul 20th, 2007, 10:24

I had a new etm and software update but the revs remained at around 750, is that were they should be?
Roy

CTCNetwork · Jul 20th, 2007, 12:17

Hi,

Question: What does the ETM software update do?

Answer: Lulls you into a false sense of security.!

Des. . .

ukdrac · Oct 19th, 2007, 22:34

i have today had the etm update on my s 80 the revs still seem to be where they allways were but they do a couple of seconds of settle down when you first stop, they seem to hover around 1500 for a few seconds then drop back down to 7-750. i assume this is the bit of the software update that prevents the computers reacting to noise to soon. all seems ok though

May 13th, 2007, 09:31	#1
DSK C70 T5 Last Online: Mar 23rd, 2022 21:00 Join Date: Sep 2006 Location: Midlands	ETM software update - what does the software do? Many of us have had the ETM software updated and the unit cleaned out at the dealers. Having read on one of the ETM issue threads, the updated software simply slows down the failure of the ETM, got me thinking, does anyone know what the i) old software did and ii) what the new updated software does? Lastly, as the ETM software to some degree communicates with the gearbox software (thats what the Volvo mechanic said), is there a possibility the existing gearbox software will also require an update to work correctly with the updated ETM software? Last edited by DSK; May 13th, 2007 at 09:33. Reason: attempted thread title reword

Jul 19th, 2007, 07:44	#3
Zota New Member Last Online: May 15th, 2012 08:32 Join Date: Sep 2006 Location: Sydney	ETM Mod, what it does The worn track on the ETM potentiometer causes "noise" which confuses the engine computer. It appears that they have increased the time before the engine computer signals an error. As the wear gets worse there will come a time when the engine will start surging as others have reported here. I have had the sodtware mod done and so far so good.However, I know I am on borrowed time. It is not a fix, just a cover up. BTW my engine idle speed was not changed.

Jul 20th, 2007, 12:17	#5
CTCNetwork Forum Support Team Join Date: Dec 2004 Location: Liège, Belgium View Photos By: CTCNetwork	Hi, Question: What does the ETM software update do? Answer: Lulls you into a false sense of security.! Des. . . __________________ Density:- Not just a measurement ~ It's a whole way of Life.! ! ! I drive a Volvo, Please Don't Get In My Way! OldVolvos4Ever He shows up. People die. He vanishes. People should not be afraid of their governments. "He'll deliver more justice in a weekend than 10 years of your Governments should be afraid of their people... "V" courts & tribunals. Just stay out of his way." "I plan to."

Oct 19th, 2007, 22:34	#6
ukdrac Junior Member Last Online: Jul 4th, 2014 16:45 Join Date: Sep 2007 Location: DEVON View Photos By: ukdrac	etm udate revs i have today had the etm update on my s 80 the revs still seem to be where they allways were but they do a couple of seconds of settle down when you first stop, they seem to hover around 1500 for a few seconds then drop back down to 7-750. i assume this is the bit of the software update that prevents the computers reacting to noise to soon. all seems ok though

May 13th, 2007, 14:02	#2
T-5ones Not banned, yet! Last Online: May 30th, 2023 00:02 Join Date: Jan 2007 Location: Town View Photos By: T-5ones	If you have a search around on the net, you will find out how the ETM sensor "fingers" wear out the carbon tracks at the lower end of the rev range. One of the things the new software does is up the revs a bit at idle to keep the sensors off the worn areas of the carbon track. The software also slightly desensitises the rev demand to omit the rev "bounce" which is also associated with the problem. I am not technically minded and someone else will hopefully be able to give a more specific answer.

Jul 20th, 2007, 10:24	#4
roys v Junior Member Last Online: Apr 27th, 2010 19:43 Join Date: Apr 2007 Location: Chichester View Photos By: roys v	I had a new etm and software update but the revs remained at around 750, is that were they should be? Roy

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