Scania BMU DTC 4099 Voltage supply to the BMU control unit is too high

BMU Battery Management Unit · Scania

Code 4099 (decimal). Some diagnostic tools show it in hexadecimal as 001003.

In short

Power supply to the BMU control unit is too high, over 32 V.

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 4099 mean?

What causes Scania DTC 4099?

How does the system react?

How to fix Scania BMU fault code 4099?

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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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