Scania EMU DTC 3155 Contactor unit R126, negative contactor, short circuit to supply voltage

EMU EMU control unit · Scania

Code 3155 (decimal). Some diagnostic tools show it in hexadecimal as 000C53.

In short

The control unit indicates too high a voltage for the negative contactor output signal.

Applies to: EMU1 (ECS)

What does Scania EMU fault code 3155 mean?

What causes Scania DTC 3155?

How does the system react?

What are the symptoms?

How to fix Scania EMU fault code 3155?

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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.

Code 3155 in other Scania systems