Scania BMU DTC 840 Propulsion battery cooling system, emergency stop

BMU Battery Management Unit · Scania

Code 840 (decimal). Some diagnostic tools show it in hexadecimal as 0348.

In short

Extreme temperatures in the propulsion battery or propulsion battery heater which do not decrease after a few minutes.

Applies to: BMU5BMU6 (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 840 mean?

What causes Scania DTC 840?

How does the system react?

How to fix Scania BMU fault code 840?

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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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