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Discussion Starter #1
Hi every one I writing the first time hire , I have read perhaps all posts about this problem in this forum but can,t solve the problem .
I have 2014 ED , few days ago brakes become hard and on screen is showing brake malfunction . I checked errors and finded two :
1.The vacuum pump has malfunction - there is short circuit to ground .
2.The electric relay of vacuum pump has a malfunction - there is an open circuit .
May be some body from you had the same situation or have any thought .
I have a lot of spare part from ED with bad battery so I changed vacuum pump then engine computer ( beyond the passanger seat ) , fuse box , both relays + and -
, checked all wire : on engine , under carpet , under floor , checked brake swich and sensors - no resalt .
The bigest problem - in my country there is no Smart car dealers , is Dimler but they do not trade or make service to Smart car ( am in EU , 1000 km from
Berlin !!!! :( ) ,
 

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The vacuum pump failed, actually its windings shorted to the frame according to the error reported. This caused the second error when the fuse/breaker blew.

So why did you go beyond the simple repair of (1) replacing the pump and (2) reset the relay?

If it ain't broke don't fix it.
--
 

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2014 Cabriolet bought in Sept 2016 with 6,470 mi
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Did you clear the codes after replacing all those parts? Perhaps you solved the problem, but assumed you didn't because the codes still appear.
 

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Discussion Starter #4
The vacuum pump failed, actually its windings shorted to the frame according to the error reported. This caused the second error when the fuse/breaker blew.

So why did you go beyond the simple repair of (1) replacing the pump and (2) reset the relay?

If it ain't broke don't fix it.
--
thank you for responding , I do not checked resistance between +.- and ground becourse pump is on ruber bushing and thought can,t be shorted to the frame , I have chacked resistance existing and spare pump , thay are the same , all fuses where OK .
How I have to reset relay , by erasing error ? My friend who have diagnostic computer said that error automaticaly become inactive maybe he was wrong .
 

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Discussion Starter #6
thank you for responding , I do not checked resistance between +.- and ground becourse pump is on ruber bushing and thought can,t be shorted to the frame , I have chacked resistance existing and spare pump , thay are the same , all fuses where OK .
How I have to reset relay , by erasing error ? My friend who have diagnostic computer said that error automaticaly become inactive maybe he was wrong .
Just changed vacuum pump , checked errors this time I finded three errors
 

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May I suggest you take you car to a automotive mechanic. It doesn’t need to be a smart one. They probably fix you car in a few minutes.

that your best bet. Good Luck.
 
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