C180 S/C bypass valve pinout

Mar 6, 2014 | 03:14 PM

coyoteboy

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c180

C180 S/C bypass valve pinout

Hi all,

Wondering if you folks have a technical guru here who can help me identify some info I need?! I've just bought the supercharger from a C180 with an electronic bypass valve built in. I don't intend to fit this to a c180, so I'm trying to find out if anyone knows the pin out of the 6pin connector, and any details on voltages and control protocols?

Any help appreciated!

Mar 7, 2014 | 10:26 PM

coyoteboy

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c180

Hmmm this appears to be the second MB forum I've stumped with this one.

Mar 8, 2014 | 01:29 AM

gogos

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From: Thessaloniki, Greece

Clk 200k cabrio w209, Jeep Crand Cherokee 3.0 CRD, Smart For two

Quote:

Originally Posted by coyoteboy

The SC BPV is controlled via the ECU. Apart the function to close in order the engine to built boost and to open when the boost have reach the ECU max boost, the valve also, stays open when the car is not moving, opens when the ESP is activated and also opens when the MAF max out at 182g/s. There may be also some more functions but I don't know.

You can put a manual BPV and adjust the boost via a manual blow of valve or with the right pulley size. The M45 is a roots type sc, possitive displasment of 45ci or 750cc of air per turn. I have put an M45 to my old Jeep Cherokee 2.4L and I couldn't make the BPV work properly so finaly I put a manual one and everything works just fine.
If btw you want to stuck with the electronic BPV you can find all the wiring from MB star or Autodata 3.38 or 3.40.

Last edited by gogos; Mar 8, 2014 at 01:35 AM.

Mar 8, 2014 | 10:35 AM

gogos

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From: Thessaloniki, Greece

Clk 200k cabrio w209, Jeep Crand Cherokee 3.0 CRD, Smart For two

M271 ECU Engine Wiring Diagram

Here is the ECU engine wiring harness, according Autodata 3.38. Good Luck.

Attached Thumbnails

C180 S/C bypass valve pinout-m271-ecu-engine-wiring-diagram.jpg

Mar 14, 2014 | 10:29 AM

coyoteboy

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c180

Now thats the kind of info I wanted! Thanks, that's great!

What were your problems with the attempt to use the electronic BPV? Did it not respond properly or was it a mechanical issue?

Mar 14, 2014 | 01:06 PM

gogos

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Joined: Jan 2009

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From: Thessaloniki, Greece

Clk 200k cabrio w209, Jeep Crand Cherokee 3.0 CRD, Smart For two

Quote:

Originally Posted by coyoteboy

Now thats the kind of info I wanted! Thanks, that's great!

What were your problems with the attempt to use the electronic BPV? Did it not respond properly or was it a mechanical issue?

The problem was that I couldn't control when the BPV would open, because that function is controlled from the ECU. After that I change it with a mechanical BPV from MINI Cooper ONE and I calculate the maximum boost I wanted to have at redline. I take consideration the engine displacement, and then I play with the pulley, SC or crank. If you make it that way you don't have to put a BOV.

Mar 14, 2014 | 01:34 PM

coyoteboy

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c180

Ah I see, my plan is to replicate the ECU control via my own control box so I should be able to keep the standard valve, I just need to find the control method. I think it looks like a variable voltage input and some feedback but I'll have to crack the valve open to see.

<edit>
Ah thanks for the image, how do I download the "non thumbnail" version, it seems to open rather pixelated and it looks pretty handy!

Last edited by coyoteboy; Mar 14, 2014 at 01:37 PM.

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Aug 20, 2014 | 12:10 AM

jtcc1015

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2006, W203, C200K

Quote:

Originally Posted by coyoteboy

In case it helps anyone, I put this together after stripping my valve...

Did you need to remove the whole supercharger assembly in order to get to the Recirculating Air Flap Assembly?

Aug 21, 2014 | 08:50 AM

#10

coyoteboy

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c180

Sorry, I didn't have to extract it from the car - mine was bought for another project car as a standalone unit. The valve is bolted into the body with 4 torqx head screws and a clamp-on rubber hose, I suspect that if you can get to the heads of the screws you can probably extract it with a wiggle. I just can't tell you if you can get to those screws.