Scania BMU DTC 520 CAN communication for TMS SUB CAN missing

BMU Battery Management Unit · Scania · 2 variants

Code 520 (decimal). Some diagnostic tools show it in hexadecimal as 0208.

In short

Communication error. TMS SUB CAN has an open circuit.

Variant 1

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 520 mean?

What causes Scania DTC 520?

How does the system react?

What are the symptoms?

How to fix Scania BMU fault code 520?

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Variant 2: CAN communication for HEV-CAN missing

Applies to: BMU5

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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