Throttle body cleaning issues EPIC Volvo saga...RESOLVED!!

[sergio]

The "machine" is Vida Dice. They just know the test points a little better.
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I don't think dealers can do this; only initialize a nice shiny new one.

Of course he meant Dice und Vida. I just didn't want to mention to this intelligent that I too had the "machine" but it was the ECM that was to be tested not the car, so I said thanks and hung up.

Dealers don't like to dirty their hands. Not so easily at least.



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[sergio]

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Before I send the ECM for a test drive;
What would happen / I will learn if I replace the ECM with another one from another car.
Shall I expect to at least see the desired 12V at the end of my ETA cable?
Possibly yes
Will the engine start and run normally (at least at idle)
Or would it simply immobilize dead.


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[precopster]

This was my assertion afew posts ago as used ECMs are cheap possibly because the sellers know that programming is required.

I think it goes something like this: ECM looks to see a programming compatability between it and the CEM and IMM and then if all things match it provides pulse to injectors and coils. (just a theory)

It definitely won't start as it may immobilise by means if IMM module but remember that the thottle's only job is to provide air to the engine and cross reference this with info from MAF/MAP, pedal sensor.

My feeling is that it will give voltage to throttle but not pulse to injectors and coilpacks but I could be totally wrong.

Take a look on Swedespeed or other forums where someone has swapped ECM and had to also swap keys, IMM, CEM to get a ECM from another vehicle going

[precopster]

New development:

http://volvospeed.com/vs_forum/topic/15 ... lear-ecms/

[sergio]

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Mike
I see we share the same feeling about ECM swap results.
Now, if I decide to swap, I can "reformat" the replacement ECM, providing I can buy the software mentioned in volvospeed.
But I still have to transfer the old data, and that, it seams, is not possible Dice-Vida. Right?

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[sergio]

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Found a shop where they work mostly with Volvo, not a "Dealer" though. They will lend me a ECM.
The head tech told me that
1 - these cars have rarely if ever cable problems.
2 - he doesn't think it has to do with ECM.
He questioned me about how an with what I cleaned the TB and was kind of surprised that I still had this oscillating idle continued with a second TB!

I'll take my ECM (and not TB) to them and he will lend me his! <----------correction
It is less expensive than sending mine by UPS and waiting a week or so to get it back.

Meanwhile need a car; is 05 Hyundai Santa Fe with 170k Miles worth buying?



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[precopster]

Sergio you have no voltage going TO the throtttle body with connector off. Draser compared his readings with connector off. I also now own a '02 S60 turbo but it's stored away from home until I clear my '01 XC70 out of here. If I get a moment I'll duplicate the voltage tests.

I don't see how this will help except for the ECM they're willing to loan you.

However if you like to tinker........

After driving Volvos for almost 10 years now and seeing how other makes perform in crash tests (YouTube) personally I'd find it hard to feel safe in a Korean car. Just my 2 cents...

Subarus have a good safety and reliability record.

[precopster]

Regarding the new software I'll have to reread the post as it's rather ambiguous as to whether this helps you place a used ECM in your vehicle. Your Dice will help with SW however our Chinese copy won't talk with Volvo's servers as an authenticated copy.

You can subscribe short term as well as sw fee. The details are at http://www.volvotechinfo.com

[draser]

Fact is that there's no 12v at ETA connector - so in theory no ETA should work. I was going to suggest to put back your ETA - since at least the engine run before. However, since there's no 12v it won't do any good. Not sure how we went from a running condition, badly as it was, to no running. There's a chance that the new ETA has internal shorts, and killed the 12V driver in ECM, we can speculate all we want. Do you still have your old ETA?
Another posibility is that something is putting ECM in limp mode, and that may lower the 12v to whatever we measure there. That's why I was suggesting testing the ECM, we may be missing something.

[sergio]

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I am a bit more confused than I wished!
I understood that draser said I should have 12V.
And this, not conditional to connector being plugged into ETA, since my MAF reads 12V unplugged. (couldn't push the needle in the back of MAF)


Yes, I still have both my old ETA and old MAF.

My reticence in getting a new (used or re flushed) ECM (or at the beginning of this saga an ETA /MAF) is that I am still sure I must have screwed up something. But I can't think of anything since I was working under supervision, the mechanic would have told me. Buying /replacing by new parts should be the last last thing to do.

My main concern is the lack of communication between Throttle and ECM
Tomorrow I should get another reading of the codes.

Re another car;
I have been told several time that I should get rid of this car and "something else" and my answer has always been "I like this one!" Maybe I buy another Volvo say a V40 in lieu of a pickup/SUV.
I am such a sucker.


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