TCU I-bus E39, E46, E53, E83, E85: overview of fault patterns

The following table lists the fault patterns covered in this test module.

The last three columns contain the information on which telephone systems each fault pattern applies to:

A: telephone systems with cordless handset (e.g. optional extra 638 before 03/2005)
B: telephone systems with hard-wired mobile phone (e.g. optional extra 639 before 03/2005 and retrofit)
C: telephone systems with mobile phone connected via Bluetooth (e.g. optional extra 639 between 09/2004 and 03/2005 - Business or Professional, optional extra 639 as of 03/2005, optional extra 633)

Diagnosis

The TCU control unit is without function and cannot be activated via diagnosis either.

The mobile phone cannot be connected to the vehicle.

3	The radio is not muted during a telephone call.	A	B	C
4	The telephone menu cannot be selected.	A	B	C
5	After a terminal change, the telephone menu normally appears.		B	C
6	The SIM card of the customer is not recognised.	A
7	Implausible response of the telephone system on call waiting, brokering, conference circuit.			C

8	The caller hears no voice signal (call via hands-free speaking system).			C
9	The driver cannot hear the caller.	A		C
10	Poor voice quality during call via hands-free speaking system: whistling	A	B	C
11	Poor voice quality during call via hands-free speaking system: echo	A	B	C

12	The mobile phone is not charged.		B	C
13	When the mobile phone is placed in the snap-in adapter, the displayed signal strength falls or disappears.		B	C

14	The telephone book is not transferred.			C
15	The telephone book is only partially transferred.			C

An SMS is not transferred from the mobile phone to the display.

17	Initialisation of the Telematic services cannot be started.	A	B	C
18	Initialisation or update of the Telematic services has been interrupted.	A		C
19	General malfunction when Assist services are used.	A	B	C
20	The red telephone LED lights up.		B	C
21	No Assist service available.		B	C