DCC low VCB voltage
• Check for any other DTC from the battery pack or MGU that could explain the error. If there are any other DTC proceed according to the instructions for that DTC. • Check that the DCC E84 is connected and that connector E84-B is properly connected and free from oxidation and clean. • Check the cable harness from the central electric unit B78 and the DCC E84. • Check inside the central electric unit B78 that the fuse is properly connected and the ring connectors are properly tightened. NOTE! Working in the central electric unit B78 is considered an electrical work and shall only be performed by Scania certified personnel. Vehicle shall be made safe according to electrical work procedure. • Reset the DTC and perform a test drive of the vehicle. If the DTC returns replace the DCC E84.
What you'll see
No driver-visible symptom recorded.
System reaction
• VOR, 24V not charging. DCC will inhibit any output power and the 24-volt system will drain the 24-volt batteries. • Yellow warning lamp "24V batteries not charged" and "Hybrid System Fault" is shown in ICL
Diagnostic depth
Electrical diagnosis in the BMU
•Bad connection in the DCC VCB connector •Cable harness damage •Bad connection in the VCB central electric unit B78