DCC wrong behavor
• Check for other DTC's from the DCC that could explain the error • Check the 24V cable harness and connector to E84. • Reset DTC • Toggle ignition key to "key off" and await system reset then "key on" i.e. system wake up. • Read out DTC's again • If DTC remains active replace the direct current converter E84.
What you'll see
No driver-visible symptom recorded.
System reaction
• VOR, 24V not charging. DCC will never be enabled and the BMU will enter error state and the 24-volt system will drain the 24-volt batteries. • Amber warning lamp "24V batteries not charged" and "Hybrid System Fault" is shown in ICL
Diagnostic depth
The BMU (E83) sends a state request to the DCC (E84) and if the requested state is not communicated by the DCC (E84) the DTC is set.
Internal HW or SW error in DCC