Scania BMU DTC 4109 Internal fault in the BMU control unit

BMU Battery Management Unit · Scania

Code 4109 (decimal). Some diagnostic tools show it in hexadecimal as 00100D.

In short

Internal signals on the BMU control unit do not have expected values.

Applies to: BMU7 (BMUA)BMU7 (BMUB)BMU7 (BMUC)BMU7 (BMUD)BMU7 (BMUE)BMU7 (BMUF)BMU7 (BMUG)BMU7 (BMUH)BMU7 (BMUI)BMU7 (BMUJ)BMU7 (BMUK)BMU7 (BMUL)BMU7 (BMUM)BMU7 (BMUN)BMU7 (BMUO)BMU7 (BMUP)

What does Scania BMU fault code 4109 mean?

What causes Scania DTC 4109?

How does the system react?

What are the symptoms?

How to fix Scania BMU fault code 4109?

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This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.

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