Scania TCC DTC 522 TCC control unit, electrical fault in brown CAN bus

TCC TCC control unit · Scania

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

In short

- The CAN control unit for the brown CAN bus has entered the state bus-off, indicating communication errors.

Applies to: TCC3 (TCC)

What does Scania TCC fault code 522 mean?

What causes Scania DTC 522?

How does the system react?

What are the symptoms?

How to fix Scania TCC fault code 522?

Read the full explanation with Premium

Causes, system reaction, symptoms and step-by-step repair instructions for every fault code are available to Premium members.

  • Full explanations of every code and brand
  • Causes, symptoms and repair steps
  • New brands and codes included
Get Premium – 7,50 € / month I already have an account

Yearly plan: pay 10 months, get 12. Cancel at any time.

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

Compare code 522 in every system →