Scania MBS DTC 561 MBS expansion unit B, fault in CAN communication

MBS MBS control unit · Scania

Code 561 (decimal). Some diagnostic tools show it in hexadecimal as 0231.

In short

CAN communication with MBS expansion unit B interrupted or missing.

Applies to: MBS3 (MBS)

What does Scania MBS fault code 561 mean?

CAN communication with MBS expansion unit B interrupted or missing.

What causes Scania DTC 561?

- Voltage supply to MBS expansion unit B missing. - MBS expansion unit B is not connected to the pink CAN bus. - MBS expansion unit B fault. - MBS expansion unit B has been incorrectly installed during production.

How does the system react?

- A yellow warning indication is displayed. - Functions dependent on information from MBS expansion unit B are degraded or completely missing from the main body system (MBS). - Light-emitting diodes on MBS expansion unit B indicate current status: Expansion unit light-emitting diode Indication No light-emitting diodes light up or flash MBS expansion unit B defective Orange light-emitting diode flashes every second The application is running Yellow light-emitting diode is not active No CAN communication Orange light-emitting diode flashes three times The application is not running

What are the symptoms?

Functions connected to MBS expansion unit B are not working properly.

How to fix Scania MBS fault code 561?

  1. Check the fuse.
  2. Check the cable harness.
  3. Check the harness-to-component connector.
  4. Check the voltage supply to MBS expansion unit B.

This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.

Code 561 in other Scania systems

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