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Prima Edizione #44.
When I shut off the engine (push button in off mode), I notice a high pitch electronic tone that persists for a minute or so, and then shuts off. Any clue what this sound is? Anybody else notice it? It's probably on the upper end of frequency that most of us can hear, so the sound might be there even if you can't hear it.
 

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Possibly the electronics shutting down ? Not 100% sure of course without hearing it but maybe @Greg can chime in as he's very knowledgeable with these vehicles
 

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Prima Edizione #44.
When I shut off the engine (push button in off mode), I notice a high pitch electronic tone that persists for a minute or so, and then shuts off. Any clue what this sound is? Anybody else notice it? It's probably on the upper end of frequency that most of us can hear, so the sound might be there even if you can't hear it.
I get this too and also get this on my Jeep trail hawk and Can Am Spyder F3. I think as an earlier poster said that it is the computer (electronics) going through the shut down process.
 

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Absolutely normal. You are hearing a tiny pump run that cools the turbo. I'll put up details about this as I get more and more tech articles up on the eurocompulsion site.

Greg
eurocompulsion.net
 

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Maybe two different sounds? I also get it on non-turbo cars.

I remember when cars started using electric fans. They surprised a lot of people.
 

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Having come over from a 500 Abarth, I would agree with Greg that you are probably describing a pump that will run to cool the turbo down after shut off. If kept out of boost and run gently when approaching your destination, the pump will sometimes not activate, at least on my 500.
 

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Having come over from a 500 Abarth, I would agree with Greg that you are probably describing a pump that will run to cool the turbo down after shut off. If kept out of boost and run gently when approaching your destination, the pump will sometimes not activate, at least on my 500.
That's absolutely correct, if you drive gently for a few minuets before shutting off the engine, sometimes the pump won't run. For those people coming over from the 500 Abarth, this pump runs less in the 124, I assume because of lower engine compartment temperatures.

This pump doesn't sound like an engine cooling fan, it's much quieter, sort of quiet humming sound.

Greg
 

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I seem to recall being around a few cars that had a electric radiator fan that would on a hot Vegas day run even with the key pulled from ignition and your walking way.My understand till a set temp is read the fan runs,anybody familiar with this?
 

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Prima Edizione #44.
When I shut off the engine (push button in off mode), I notice a high pitch electronic tone that persists for a minute or so, and then shuts off. Any clue what this sound is? Anybody else notice it? It's probably on the upper end of frequency that most of us can hear, so the sound might be there even if you can't hear it.


I am SO glad you posted this question, and thank you, Greg for answering it! I hear the same sound in my car. My husband cannot hear it.
 

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I am SO glad you posted this question, and thank you, Greg for answering it! I hear the same sound in my car. My husband cannot hear it.
You're welcome. Not everyone can hear it, it's fairly quiet and kind of a high pitch. This pump is a classic case of Fiat doing something good and then not telling anyone about it. Having a computer controlled after run coolant pump is a great idea. But then they don't mention it in sales information so when people hear it, they thing something may be wrong.

Greg
 
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