Scania BMU DTC 522 Time-out in TMS CAN node

BMU Battery Management Unit · Scania · 2 variants

Code 522 (decimal). Some diagnostic tools show it in hexadecimal as 020A.

In short

Communication with TMS has been interrupted.

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 522 mean?

What causes Scania DTC 522?

How does the system react?

How to fix Scania BMU fault code 522?

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Variant 2: Timeout in GMS CAN node

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.

Code 522 in other Scania systems

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