Diagnosis instructions

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 head unit in integrated in the diagnosis of the head unit.

Function structure > 03 Body > Audio mode, Video mode, Navigation, Telephone > Head unit > Devices connected to head unit