2.5T (S60) Observation regarding engine vibration Topic is solved

[abscate]

Is the BCV control signal from the ECU strictly "on/off" or is this fed variable DC voltages? I bench tested this valve early in all this (12vDC/1A wall adapter and a switch). It seemed to function perfectly, but if its controlled as a variable valve or the ECU feed is current limited on the low side such a test may not mean much.

It's a frequency controlled solenoid, correct, so DC testing does not tell you much. I recall that it's about a 1000 Hz modulation but that info is tainted since I was diagnosed with CRJS.

[mrbrian200]

If you open up a Bosch 0280218088 you'll find a Pierburg sensor in there

Have two Bosch -8088s (one with car, and replacement open box that was bad). The Bosch branded probe doesn't look like that. So Pierburg makes two versions? ...Presumably a cheaper built one specified by some OEs, and these alternate built to last variants (I notice VW uses these beefy looking probes in many of their OE MAFs). They're all made by Pierburg, you're absolutely certain?

Anyway this is definitely a good sensor on the first try on the Pierburg. Drivability issues gone. Purry idle, good WOT, hasn't stumbled once at startup. Still have intermittent CEL/econ but that never correlated with periods where the MAF was acting up. CEL stayed off all last week when I was in Chicago (ethanol/low emmissions city gas) despite MAF related drivability issues. Came back to Indiana put country gas in (100% gas fewer additives) CEL ticked on about the time it would have gone into closed loop + 1 mile. We'll say I've seen this before on other cars. O2s teetering on the edge or a weak spark/coil pack. For a period they will "like" city/reformulated gas if you let it go eventually they won't like either.

*Edit: I think the "big city/low emmissions blend" burns hotter, covering weak ignition/bringing borderline O2s readings back into range. This is only an educated guess/theory though.

I did order a better diagnostic tool. It's the one I mentioned I'd be comfortable for diagnostic work but wouldn't trust it regarding data integrity for programming/vehicle software updates. If I decide updating needs to be done I will visit a dealer/good independent that has a real one. That locksmith in Chicago I visited last week was using a real one. I mentioned I was thinking about getting a Chinese clone unit he issued few words of caution.

[precopster]

I've programmed 2 ECMs with a clone and about 85 ETMs. No problems so far. Check that the board is a Teleca.

I'm beginning to wonder if camshaft actuation is taking place or if it's sporadic. When you get your tool and Vida there is a section called CA Expected and CA Actual in ECM values. Make sure you take a look. Often the camshaft solenoids can be sluggish but not call up a CEL.

[mrbrian200]

I'm beginning to wonder if camshaft actuation is taking place or if it's sporadic. When you get your tool and Vida there is a section called CA Expected and CA Actual in ECM values. Make sure you take a look. Often the camshaft solenoids can be sluggish but not call up a CEL.

That thought has occurred to me as well. A bit expensive to replace blindly. That was one of the things I planned to take a look at once I have the diag tool. With 84k miles I'm replacing the plugs/boots and upstream 02 sensor in the meantime. All those are due or coming due so there's no reason not to just go ahead. I want to check coil packs while I have it apart. Do these packs have primary/secondaries that can be measured directly with a DMM or is the primary side isolated internally through a MOSFET?

Oh, and DTC takes the fun out of this car. And it re-enables everytime you restart. Wish they could have included a "sport mode" that auto-disables DTC based on conditions: ambient temp above 36, havent' used the windshield wipers recently, rain sensor doesn't "see" water on the windshield, loss of traction hasn't been detected while "crusing"/not under hard acceleration. Info center could momentarily pop a message at key on/every 15 minutes or so just as a reminder...

EDIT: nevermind regarding the coil packs. Found a picture. 4 wires would indicate B+, ground, and a low current switch signal from the ECU. If the ECU were wired directly to the primary it would be 2 (or 3 if they were nutty with regard to the secondary ground). That would get very hot there I can see why these are known to fail if the solid state portion isn't built with high heat tolerant/mil spec stuff. Definitely wouldn't want to "go cheap" with those.

[mrbrian200]

Teleca yes. Board doesn't quite look like what I would expect from a cheap knockoff,it's not bad. Acceptable SMD work (better than PEM board in the car!). No SD or BT installed. CPU version has 512kb flash. I still wouldn't take out a subscription and program with it, though. Banter on sweedspeed indicate these units tend to cut corners in several areas with one being USB filtering. Just because the tool seems to work doesn't mean a few bits aren't flipped here and there. If this were a video game I'd say sure why not...but we're talking about a real car rolling 60-80mph down the highway makes it effectively "mission critical" level data it's just not worth the risk if you ask me.

Still trying to decide which spare/old laptop I want to dedicate to this. Only one with enough RAM installed is a Samsung worth $ I was planning to sell.

[precopster]

There is a directory you can edit before install to force the install program to.accept lower installed ram than 2GB. My 2011A version runs happily on 1.5GB ram and my virtual setup runs on 800MB ram though it's painfully slow.

My board has no SD or BT. I don't think any clone does. The BT chip's socket location is there on mine and it's purchasable from an Italian company who's name I don't recall.

If you don't trust it for programming don't use it in that way. Trust in my unit is now earned. In any case my programmer does checksum addition for critical jobs such as ECM or brake controllers. On the ETMs it's a 256kb flash file so not a long download and they have a startup test that determines pairing with the ECM.

I've also done 2 window controllers (PDM and DDM) and a 2003 BCM (btake module)

If the firmware transfet doesn't work it's been because of wiring problems on target cars or poor internet in the programming area (I use 4G for connection)

[mrbrian200]

Got the software running. One of my old laps I thought I had scavenged the RAM but when I checked it was still installed (4GB, core2 duo T6600, 320GB disk). I just did what everyone says you should do (refresh OS from recovery media/partition, uninstall all bundled software that isn't required for a device/driver). Aside from the packaged version of VIDA wanting IE 9 (not IE8) had no problems installing/getting it to run. Updated the OS to service pack 1 then turned WU and wifi card off.

I never reset the ECU I wanted to see everything that had ever been stored...
CEL was not lit last few days, two stored engine management DTCs are for MAF signal low (this is fixed), and Long term bank 1 fuel trim signal low (I was already on it - upstream sensor + spark plugs en route). Went with NGK 02 sensor and Bosch FR7DPP+ plugs. Coil pack boots I found local for a better price, Bosch reboxed under house brand, set of 5 for $30 at AZ. They incorrectly list them a "wireset" but hey all 5 for $30...sold.

VIDA also listed 2 chassis problems that I was already aware VIDA merely confirmed. Both on hold for warm weather. AC door motor fault (it works but is slow to respond, directs air where you want it but not "all the way" eg - vents never shut completely off or full on but it works well enough for now. And interior lighting voltage low (they work all the time, sometimes they're nice and bright, other times they're a little dim around 75%). The software bundled with the Dice unit didn't include EWS I will need to find that as the interior lights is likely a splice/ground/connection issue, I'll be lost without a diagram. Suitable weather is months away there's no rush on that though.


Short supply of old laptops. I found one that met requirements had more memory installed than I thought I remembered (core2 duo, 4GB ram, 320GB disk). Except it has Winowos 7 Home Premium. I know the differences between OS versions the only thing I can think VIDA might want Pro for is domains? Temporary registry hack gets past VIDA hardware check offline diagnostics seems to work fine on it.

[mrbrian200]

Thinking about it I probably didn't need a DICE/VIDA all that bad. Someday if I genuinely need it I'll have it ready to go. MAF easily diagnosed by symptom and "unplug it test", O2s I eventually diagnosed by symptom (I noticed the classic exhaust temperature feedback loop cycling behavior a couple times last week which is when I went ahead and ordered the O2S).

[mrbrian200]

My board has no SD or BT. I don't think any clone does.

We probably have the same "build". Missing parts are BT module, SD holder, controller chip, and 1 isolator IC. I'm not sure the Bluetooth would fire up just by placing that module. Looking at where those traces go I suspect both items (BT,SD) need that missing controller chip (40p SOIC). Your guess as good as mine to which exact IC belongs there.

[mrbrian200]

Hypothetically, if someone were dealing with a leak in the intake somewhere... As a MAF fault can be set when the ECU decides fuel metering during closed loop isn't correct for the amount of air sensed (not 14.7:1 ratio), A "low" MAF reading would indicate a leak somewhere between the MAF->turbo -or- after the throttle plate. A "high" reading would indicate a leak after the turbo but before the throttle plate. Correct?