Question: what is the electrical humming after engine is switched off?
07-27-2011, 06:23 AM
#1
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Audi A4 Quattro 2013
Question: what is the electrical humming after engine is switched off?
I'm just curious, when my w203 is switched off, in the cabin there is an electrical humming noise for a few minutes. I've always wondered what this is?
/posted using iPhone\
/posted using iPhone\
07-27-2011, 09:37 AM
#2
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It's all the servos, excess air pump, fuel rail pump, purge system, EGR etc. shutting down after switch off
07-27-2011, 10:27 AM
#4
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Even the ABS pump goes through a shutdown cycle. I think the air pump is probably the noisiest but it is all normal with a few solenoids clicking as well. There is a lot going on on these cars when you shut down.
07-27-2011, 04:30 PM
#5
MBWorld Fanatic!
Ahhhh, far too much complexity in the modern car which in my opinion is not warranted .
There are people having expensive problems with their SAMS ,ECUs ect mentioned in this forum every day.
Take a look at the old Soyez rocket. ,now 45 years old, & the only vehicle servicing the Space Lab. It is the most frequently used & most reliable launch vehicle in the world. It doesn't have all this newest technology & it puts people into space today!!
http://en.wikipedia.org/wiki/Soyuz_(...amily)#History
There are people having expensive problems with their SAMS ,ECUs ect mentioned in this forum every day.
Take a look at the old Soyez rocket. ,now 45 years old, & the only vehicle servicing the Space Lab. It is the most frequently used & most reliable launch vehicle in the world. It doesn't have all this newest technology & it puts people into space today!!
http://en.wikipedia.org/wiki/Soyuz_(...amily)#History
Last edited by Carsy; 07-27-2011 at 08:49 PM. Reason: soyuz
07-27-2011, 11:08 PM
#6
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Thats the way things are headed. Its all about electrics and computer etc. Its the price we pay to have those added luxury and safety features. I bought the w203 well knowing that there were a lot of reports with electrical issues. I just hope when/if they start to come up, the warranty will cover them.
07-27-2011, 11:09 PM
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I noticed yesterday, after driving through a storm with; heater, fog light, wiper on full, rear window demister all going, it was louder shutting down than normal.
