Scania BMU DTC 1556 Electrical power take-off R126, fault in the positive contactor and negative contactor

BMU Battery Management Unit · Scania

Code 1556 (decimal). Some diagnostic tools show it in hexadecimal as 0614.

In short

After the contactors opened, voltage class B was detected from the electrical power take-off.

Applies to: BMU6 (RES)BMU6 (RESXA)BMU6 (RESXB)BMU6 (RESXC)BMU6 (RESXD)BMU6 (RESXE)BMU6 (RESXF)BMU6 (RESXG)BMU6 (RESXH)BMU6 (RESXI)BMU6 (RESXJ)BMU6 (RESXK)

What does Scania BMU fault code 1556 mean?

What causes Scania DTC 1556?

How does the system react?

What are the symptoms?

How to fix Scania BMU fault code 1556?

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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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