Scania BMU DTC 3159 Pre-charge contactor, short circuit to earth or open circuit

BMU Battery Management Unit · Scania

Code 3159 (decimal). Some diagnostic tools show it in hexadecimal as 000C57.

In short

The control unit has interpreted that there is a short circuit to 24 volt voltage or an open circuit on the control signals to the contactor.

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 3159 mean?

What causes Scania DTC 3159?

How does the system react?

How to fix Scania BMU fault code 3159?

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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.

Code 3159 in other Scania systems