Scania BMU DTC 1289 Incorrect connection of terminals on the DC rails

BMU Battery Management Unit · Scania

Code 1289 (decimal). Some diagnostic tools show it in hexadecimal as 0509.

In short

The direct current charging terminals are inverted, positive terminal goes to negative and negative terminal to positive.

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 1289 mean?

What causes Scania DTC 1289?

How does the system react?

What are the symptoms?

How to fix Scania BMU fault code 1289?

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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 1289 in other Scania systems

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