COMBI Instrument cluster power supply

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.

Symptoms:

The time and date in the instrument cluster and in the Central Information Display are lost.
The fault memory entry "Power supply switched off (terminal 30F)" is stored in the instrument cluster.

Cause:

The fault memory entry does not indicate a defect in the instrument cluster or in the power supply of the instrument cluster, rather only disconnection of the power supply of the instrument cluster by the JBE: Reset or shutdown of terminal 30F. Reset or cutoff of terminal 30F is due to a fault in the vehicle: too many wakings with terminal R Off, closed-circuit current fault, sleeping inhibited, reaching the starting capability limit.

Procedure:

If there is an impairment (e.g. time was lost; see above symptoms), the test module 'Energy diagnosis' helps in finding the cause of the problem in the vehicle energy system: run the test module.

If the vehicle had a breakdown due to a flat battery despite the reset or cutoff of terminal 30F, it is usually the case that the control modules supplied via this terminal are not the likely cause.