Audi Workshop Service and Repair Manuals > A4 Mk3 > Vehicle electrics | Communication | Infotainment | Telephone system | Connectors for mobile phone pre-installation (CAN)

Connectors for mobile phone pre-installation (MMI up to week 44/08) > < Microphone unit in front roof moduleR164 (from week 45/08 onwards)

Connectors for mobile phone pre-installation (CAN)

Connectors for mobile phone pre-installation (CAN)

Telephone transmitter and receiver unit -R36-

A -	Connection for aerial for Bluetooth -R152-

B -	Multi-pin connector, 54-pin (T54a)

Note

Contacts which are not listed are not used.

A91-11120

B - Multi-pin connector, 54-pin (T54a)

1 -	Terminal 30

2 -	Terminal 31

3 -	Switch-on signal to aerial amplifier for mobile telephone -R86-

8 -	NF+ (low frequency) to radio -R-

9 -	NF (–) (low frequency) to radio -R-

10 -	Terminal 31 screen earth (not used)

11 -	Microphone input (+) from microphone unit in front roof module -R164-

12 -	Microphone input (–) from microphone unit in front roof module -R164-

16 -	NF mute (low frequency) (not used)

17 -	CAN bus High (Infotainment)

18 -	CAN Bus Low (Infotainment)

37 -	Terminal 30 to telephone bracket -R126-

39 -	Terminal 31 to telephone bracket -R126-

41 -	Terminal 30 to telephone bracket -R126-

42 -	Microphone output (+) to telephone bracket -R126-

43 -	Microphone output (–) to telephone bracket -R126-

44 -	Terminal 31 (screen earth)

45 -	NF (+) (low frequency) from telephone bracket -R126-

46 -	NF (–) (low frequency) from telephone bracket -R126-

47 -	DIAG signal from telephone bracket -R126-

49 -	Ser-Tx (+) to telephone bracket -R126-

50 -	Ser-Tx (–) to telephone bracket -R126-

51 -	Ser-Rx (+) from telephone bracket -R126-

52 -	Ser-Rx (–) from telephone bracket -R126-

A91-11311

Vehicle electrics
Communication / Infotainment
Telephone system
Connectors for mobile phone pre-installation (CAN)

Connectors for mobile phone pre-installation (MMI up to week 44/08) > < Microphone unit in front roof moduleR164 (from week 45/08 onwards)