Oscillogram for a faulty alternator:

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2006 BMW X5, 2006 BMW X3, 2005 BMW X5, 2005 BMW X3, and 2004 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

One phase interrupted.

Repair/exchange alternator.

Fig 1: View Of Oscillogram For One Phase Interrupted

G03310561

Courtesy of BMW OF NORTH AMERICA, INC.

Interturn fault.

Fig 2: View Of Interturn Fault

G03310562

Courtesy of BMW OF NORTH AMERICA, INC.

Repair/exchange alternator.

Open circuit in negative diode.

Fig 3: View Of Open Circuit In Negative Diode

G03310563

Courtesy of BMW OF NORTH AMERICA, INC.

Repair/exchange alternator.

Short circuit in positive diode.

Fig 4: View Of Short Circuit In Positive Diode

G03310564

Courtesy of BMW OF NORTH AMERICA, INC.

Repair/exchange alternator.

Open circuit in positive diode.

Fig 5: View Of Open Circuit In Positive Diode

G03310565

Courtesy of BMW OF NORTH AMERICA, INC.

Repair/exchange alternator.

Open circuit in exciter diode.

Fig 6: View Of Open Circuit In Exciter Diode

G03310566

Courtesy of BMW OF NORTH AMERICA, INC.

Repair/exchange alternator.

Assemble engine.

Check function of DME.