Diagnosis instructions
WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
The state of charge of the emergency battery can be read via the control unit functions and the procedure for telecommunications. If the emergency battery needs to be replaced, a fault memory is stored.
Function structure > 03 Body > Audio, Video, Navigation, Telephone > Telecommunications > System check
The diagnosis of the USB connection between Telematic Communication Box (TCB) and headunit in integrated in the diagnosis of the headunit.
Function structure > 03 Body > Audio mode, Video mode, Navigation, Telephone > Headunit > Devices connected to headunit