Oscillogram for a faulty alternator

WARNING: This page is about a different variant/trim than selected.

One phase interrupted.

Repair/exchange alternator.

Fig 1: Oscillogram Faulty Alternator Voltage Graph

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Interturn fault.

Repair/exchange alternator.

Fig 2: Oscillogram Alternator Voltage Graph (Interturn Fault)

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Open circuit in negative diode.

Repair/exchange alternator.

Fig 3: Oscillogram Alternator Voltage Graph (Open Circuit)

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Short circuit in positive diode.

Repair/exchange alternator.

Fig 4: Oscillogram Alternator Voltage Graph (Short Circuit)

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Open circuit in positive diode.

Repair/exchange alternator.

Fig 5: Oscillogram Alternator Voltage Graph (Open Circuit)

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Open circuit in exciter diode.

Repair/exchange alternator.

Fig 6: Oscillogram Alternator Voltage Graph (Open Circuit)

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Assemble engine.

Check function of DME/DDE.