10-06-2012, 12:09 PM
Officially Welcomed to the 'Fest
Join Date: Nov 2011
Mein Auto: '98 E39 528i
I also wanted to clarify this EVAP thing because I saw in the carfax of my car that this has been replaced. This is what I have found:
My car is a 528i 10/1997. I have checked the colors of the wires going to the fuel tank vent valve / charcoal filter valve / EVAp valve. It's red/blue and brown. When I check this on spagetticoder, it should be red/white and brown. I think the database has some errors here.
When I look for the fuel vent valve for my car:
spagetticoder >> Drive >> Engine (without M51 engine) >> Engine electrical system >> Digital Motor Electronics >> Actuator >> Fuel tank vent valve
it will bring up the Y6120 charcoal filter valve with red/white & brown cables.
Now if I choose the later model for E39 (post 09/1998) for example the MS43
there is a line:
".. ensure regeneration of the carbon canister when the fuel tank vent valve (TEV) is open .."
And then I go to the BMW-specific E39 acronyms (list and definition)
and search for TEV:
"TEV = evaporative purge control valve"
Again I checked an other (post 09/1998) model on spagetticoder:
Complete vehicle >> Drive >> Engine (DME Motor Electronics ME7.2 or DME Motor Electronics MSS52) >> Fuel system >> Fuel tank vent valve >> Fuel tank vent valve (without DME motor electronics MSS52)
it will bring up the Y6120 Charcoal filter valve with red/blue and brown cable. Notice that the brown cable has the name T_TEV.
So my conclusion is that the EVAP system valve is the same as fuel vent valve, and since there is no additional valve in the charcoal canister, BMW refers to the fuel vent valve as the charcoal filter valve.
I have also found that the very first picture I attached in beginning of this thread is a fuel vent valve for a 525i M54 engine.