Scania EMU DTC 20573 Contactor unit R126, pre-charge resistor contactor, short circuit to battery

EMU EMU control unit · Scania

Code 20573 (decimal). Some diagnostic tools show it in hexadecimal as 00505D.

In short

The control unit indicates too high a voltage.

Applies to: EMU1 (ECS)

What does Scania EMU fault code 20573 mean?

What causes Scania DTC 20573?

How does the system react?

What are the symptoms?

How to fix Scania EMU fault code 20573?

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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.