Scania EMU DTC 8771 Water valve V243, incoming PWM signal, invalid value

EMU EMU control unit · Scania

Code 8771 (decimal). Some diagnostic tools show it in hexadecimal as 002243.

In short

The control unit states that the PWM input signal value is outside the expected range.

Applies to: EMU1 (ECS)

What does Scania EMU fault code 8771 mean?

What causes Scania DTC 8771?

How does the system react?

What are the symptoms?

How to fix Scania EMU fault code 8771?

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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.