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Old 01-19-2013, 11:40 AM
mr_bean mr_bean is offline
Officially Welcomed to the 'Fest
Location: NJ
 
Join Date: Mar 2009
Posts: 681
Mein Auto: 2000 328i
Go here:
http://www.bmw-planet.com/diagrams/r.../e90/index.htm

From the menu on the left select "complete vehicle > Drive > Motor Electronics (the one that is appropriate for your engine) > Air Supply"
Click the "air supply" icon and the wiring diagram for the MAF will show-up on the screen. The pin-out and wire colors are shown next to each respective wire.
Click the help icon in the lower right corner to decipher the color codes for the wires. For instance "GE" means yellow. Since there are two yellow wires to the MAF you'll need to pull the connector off the DME and test the continuity back to the bare ends by the MAF to determine which yellow wire goes to which pin on the DME.

Good luck!
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