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Discussion Starter · #1 ·
Hey SS I have been meaning to post this for some time but in light of seeing all the problem threads I thought I would share... I usually do an electronic throttle body calibration every 6 months or so. It is super easy and the first time I did it the car was a different machine...

Step 1: Turn ignition to position two and wait... You will hear the calibration process take place within about 30 seconds or so. Wait until the calibration finishes turn back to position 0 wait 5 seconds and then start vehichle with a freshly calibrated throttle :)
 

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Please elaborate...
Due to the nature of ETM's, if the TPS sensor is not perfectly aligned or the potentiometer resistance changes slightly; which does happen over time, the throttle position will be off a bit. That means that the response will be different and that the reported position won't be the actual position.


Handy to know that the Volvo ETM's can be recalibrated without needing any special stuff.
 

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Cool!
I just ran out and tried this. You could clearly hear it doing its thing. Made some clicking sounds too!
 

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with Vida you can do a sweep test at the same time to actually see what the resistance values are for the 2 sensors in the ETM. if they vary more than 13 degrees, you get to buy a new throttle body :D
 

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If the sweep test is 13 degrees or more, Volvo will buy the new ETM, unless, like me, you are out of warranty time and mileage, then the owner buys it. At that point, Xemodex here I come. I actually had an ETM replaced with a 3 degree sweep error, but it was erratic and had all the symptoms of a bad ETM. Factory rep made me a deal, he'd replace it with an new one, and if that solved the problem, then it was on him for warranty, if it didn't work, then I paid labor. My dealer mechanic said this was a no brainer, since he's seen many fail with less than the required 13 degree sweep result, and replacing it fixed my problems. I figure I still have a bit of time before this one pukes and I get it replaced. Fortunately, I have a core already to send to Xemodex. Also, this only applies to '99 to '01 turbos, and up to '02 NA engines so the '04 - '07 "R" cars don't have to worry about this. After '01 or '02, Volvo finally replaced that miserable Magnetti Marelli unit with a Bosch one. Only good news is the same MM unit was used in Ferrari's and Xemodex cost for those is several times the cost for a Volvo one.
 

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why would it need to be recalibrated? Did you remove it and clean it or something?


I remember one time i had to recalibrate a friends 03 sentra spec-V after putting a new engine in it, whatta pain in the arse.
 

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Yep my '01 is in that same boat. I'm at 113k miles on the original ETM and also original transmission *gulp* and so far so good.
 

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Discussion Starter · #9 ·

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Discussion Starter · #10 ·
why would it need to be recalibrated? Did you remove it and clean it or something?


I remember one time i had to recalibrate a friends 03 sentra spec-V after putting a new engine in it, whatta pain in the arse.
Over time the alignment and accuracy in which the throttle position is actually at in relation to where it was when new will begin to differ. It is just like getting your tires aligned or balanced... Over time they get a little thrown off just because, this helps it to function at it's peak ability.
 

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Hey SS I have been meaning to post this for some time but in light of seeing all the problem threads I thought I would share... I usually do an electronic throttle body calibration every 6 months or so. It is super easy and the first time I did it the car was a different machine...

Step 1: Turn ignition to position two and wait... You will hear the calibration process take place within about 30 seconds or so. Wait until the calibration finishes turn back to position 0 wait 5 seconds and then start vehichle with a freshly calibrated throttle :)
How did you figure this out? Sometimes im amazed at the things I learn on the forums. Im anxious to try this out in the morning.
 

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Tried this and absolutely nothing happened. All I could hear was (what I think was) the headlights buzzing every 5 seconds or so. Tried it several times, all with the same result.
 

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yep, I did it just now. Clicks happen at about the 20 second mark. There's about 3 clicks and then it's done.
 

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Same here, nothing happened.
 

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I tried too, and not sure if anything happened. My car is running so well right now, with all the recent maintenance, that perhaps if it did in fact do something, I sure couldn't tell.
 

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i could hear it when i was fooling around in my car the other day
 

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This is probably a waste with the new Bosch's. The older ETM's before 2004 had huge problems, but the Bosch's are pretty good. I did extensive research into this about 4 months ago when trying to figure out my leakage numbers on Vida. In fact, I would just chalk this up as someone telling me they got better performance after resetting power to the ECU.
 

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So this will do no good on my 04SR ?
 

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So this will do no good on my 04SR ?
Absolutely nothing mechanically. The affected ETM's are in the 90's-2002. If you want to do a real improvement on the TB, then go spend 6 dollars on a TB gasket, pull it, clean it and reinstall it.

Like this:



 
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