Scania CCU DTC 40977 Fan motor, voltage supply fault

CCU CCU control unit · Scania

Code 40977 (decimal). Some diagnostic tools show it in hexadecimal as A011.

In short

The feedback signal from the cab fan to the control unit indicates that the voltage supply to the fan motor is outside the interval between permitted values.

Applies to: CCU1

What does Scania CCU fault code 40977 mean?

What causes Scania DTC 40977?

How does the system react?

What are the symptoms?

How to fix Scania CCU fault code 40977?

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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.

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