Applies to: BMU7 (BMUA)BMU7 (BMUB)BMU7 (BMUC)BMU7 (BMUD)BMU7 (BMUE)BMU7 (BMUF)BMU7 (BMUG)BMU7 (BMUH)BMU7 (BMUI)BMU7 (BMUJ)BMU7 (BMUK)BMU7 (BMUL)BMU7 (BMUM)BMU7 (BMUN)BMU7 (BMUO)BMU7 (BMUP)
What does Scania BMU fault code 4108 mean?
Fault in communication between the BMU control unit and cell monitoring circuit boards. No circuit board is sending data.
What causes Scania DTC 4108?
- Fault in cable harness and harness-to-harness connector between the BMU control unit and the cell monitoring circuit boards. - Fault in the cell monitoring circuit board. - Fault in BMU control unit.
How does the system react?
- A yellow warning indication is displayed. - Disconnect the propulsion battery.
How to fix Scania BMU fault code 4108?
- Important!
- The fault indicates that the propulsion battery classification is category 5: Unknown.
- Further troubleshooting is needed to determine whether it is safe to handle.
- Check the cable harness and harness-to-harness connector between the BMU control unit and the cell monitoring circuit boards.
- Renew the cell monitoring circuit board.
- Renew the BMU control unit.
This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.