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M2 Technical Topics > Mechanical Maintenance: Break-in | Oil & Fluids | Servicing | TSB | Recalls > No power at OBD2 port, no battery power voltage at port

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      11-05-2023, 12:09 PM   #1
omar.ahmad0524
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No power at OBD2 port, no battery power voltage at port

Tried to plug my scan tool in the obd2 port and the tool didnt turn on. Tried on my other 5 series (F10) and powered on no problem.

Checked the OBD fuses and all are not blown. Then checked the OBD port power with my multi meter and there's no power. Battery voltage to ground reads 0 volts (pin 16 and 4)

Whats next here? How do i get diagrams of where the OBD port wires go and such?
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      11-13-2023, 09:22 AM   #2
omar.ahmad0524
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update:

Diagnosed to fuse 12 in FEM that was blown. this fuse is in line with the OBD2 diag pin 16
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      12-04-2023, 08:20 AM   #3
NelsM2CF87
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Where is fuse 12 located ?
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      12-31-2023, 06:38 PM   #4
omar.ahmad0524
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Quote:
Originally Posted by NelsM2CF87 View Post
Where is fuse 12 located ?
in the FEM (front electronic module). I think for most F series vehicles, its the passenger side interior on the right side wall adjacent to the glove box. Fuse 12 is directly on the actual module.


edit: location of the FEM
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