Oscillogram for a faulty alternator

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2011 BMW 323i, 2010 BMW 328xi, and 2010 BMW 328i. However, it is still accessible from the selected car via links, so may be relevant.

One phase interrupted.

Repair/exchange alternator.

Fig 1: Oscillogram For Faulty Alternator (One Phase Interrupted)

G04740395

Courtesy of BMW OF NORTH AMERICA, INC.

Interturn fault.

Repair/exchange alternator.

Fig 2: Oscillogram For Faulty Alternator (Interturn Fault)

G04740396

Courtesy of BMW OF NORTH AMERICA, INC.

Open circuit in negative diode.

Repair/exchange alternator.

Fig 3: Oscillogram For Faulty Alternator (Open Circuit In Negative Diode)

G04740397

Courtesy of BMW OF NORTH AMERICA, INC.

Short circuit in positive diode.

Repair/exchange alternator.

Fig 4: Oscillogram For Faulty Alternator (Short Circuit In Positive Diode)

G04740398

Courtesy of BMW OF NORTH AMERICA, INC.

Open circuit in positive diode.

Repair/exchange alternator.

Fig 5: Oscillogram For Faulty Alternator (Open Circuit In Positive Diode)

G04740399

Courtesy of BMW OF NORTH AMERICA, INC.

Open circuit in exciter diode.

Repair/exchange alternator.

Fig 6: Oscillogram For Faulty Alternator (Open Circuit In Exciter Diode)

G04740400

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check function of DME/DDE.