Oscillogram for a faulty alternator

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2014 BMW X6, 2013 BMW X6, 2012 BMW X6, 2011 BMW X6, and 2010 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.

One phase interrupted.

Repair/exchange alternator.

Fig 1: Oscillogram Faulty Alternator Voltage Graph

G04740395

Courtesy of BMW OF NORTH AMERICA, INC.

Interturn fault.

Repair/exchange alternator.

Fig 2: Oscillogram Alternator Voltage Graph (Interturn Fault)

G04740396

Courtesy of BMW OF NORTH AMERICA, INC.

Open circuit in negative diode.

Repair/exchange alternator.

Fig 3: Oscillogram Alternator Voltage Graph (Open Circuit)

G04740397

Courtesy of BMW OF NORTH AMERICA, INC.

Short circuit in positive diode.

Repair/exchange alternator.

Fig 4: Oscillogram Alternator Voltage Graph (Short Circuit)

G04740398

Courtesy of BMW OF NORTH AMERICA, INC.

Open circuit in positive diode.

Repair/exchange alternator.

Fig 5: Oscillogram Alternator Voltage Graph (Open Circuit)

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Courtesy of BMW OF NORTH AMERICA, INC.

Open circuit in exciter diode.

Repair/exchange alternator.

Fig 6: Oscillogram Alternator Voltage Graph (Open Circuit)

G04740400

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check function of DME/DDE.