Scania BMU DTC 791 Coolant pump (M86) for cooling system, incorrect behaviour

BMU Battery Management Unit · Scania

Code 791 (decimal). Some diagnostic tools show it in hexadecimal as 0317.

In short

The coolant pump does not respond correctly to the request.

Applies to: BMU6 (RES)BMU6 (RESXA)BMU6 (RESXB)BMU6 (RESXC)BMU6 (RESXD)BMU6 (RESXE)BMU6 (RESXF)BMU6 (RESXG)BMU6 (RESXH)BMU6 (RESXI)BMU6 (RESXJ)BMU6 (RESXK)

What does Scania BMU fault code 791 mean?

What causes Scania DTC 791?

How does the system react?

What are the symptoms?

How to fix Scania BMU fault code 791?

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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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