In the instrument cluster, the symbol for "12 V battery" and the message "Switch on vehicle" may sporadically be displayed.
As a consequence of this, the fault codes B 1 FCB97 (=> N73/3) and U 116000 (=> N73/3*1) are stored in the fault memory.
In the subsequent analysis of the 12 Von-board electrical system data, the following parameters are conspicuous
(see picture 1 in the attachment):
⢠Charge balance negative when stationary.
⢠Interior CAN bus is awake for an unusually long time.
⢠12 V battery SOC (state of charge) during subsequent engine start is 45% or less.
NOTE:
Once the 12 V battery SOC has exceeded 50% for the first time, the symbol and the message in the instrument cluster
disappear again.
The door control unit (N69/x) may sporadically keep the interior CAN bus awake.
NOTE:
Exclusively door control units with the HW item numbers A2239019917 and A2239010018 can be affected.
Open a TIPS case and include the following:
1. Initial Quick Test
2. N73/3 EZS CUL
3. N73/3*1 EZS CUL
4. Date and time of occurrence
