Scania EMU DTC 20575 Contactor unit R126, incorrect VCB connection, reverse polarity

EMU EMU control unit · Scania

Code 20575 (decimal). Some diagnostic tools show it in hexadecimal as 00505F.

In short

The control unit reports a negative voltage on the vehicle side of the contactor unit.

Applies to: EMU1 (ECS)

What does Scania EMU fault code 20575 mean?

What causes Scania DTC 20575?

How does the system react?

What are the symptoms?

How to fix Scania EMU fault code 20575?

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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.