MMI Bluetooth Hands-Free Calling

MMI Bluetooth Hands-Free Calling

Information electronics control module 1 (J794)





1. Not assigned

2. Connection Block with Four Connectors

3. MOST bus

4. Not assigned

5. Gray 4-pin connector (T4am) to the front information display control head (J685)

6. 4-pin connector (T4ap) for the external audio source connection (R199) / internet access control module (J666) (from MY 13)

7. Not assigned

8. Not assigned


• Unlisted connector terminals are not used.

2 - Connection Block With Four Connectors

A - 8-Pin Multi-Pin Connector (T8ah)





1. Not assigned

2. Voltage supply to multimedia system control head (E380)

3. Wake UP to multimedia system control head

4. Not assigned

5. Not assigned

6. Res MU to multimedia system control head

7. Ring-break diagnostic cable


B - 12-Pin Connector (T12x)





8 Microphone input (+) from Microphone unit in front roof module (R164) ( left front microphone (R140) )
9 Microphone input (-) from Microphone unit in front roof module (R164) ( left front microphone (R140) )

C - 12-Pin Connector (T12y)





All pins are connected to the external audio source connection (R199).

1. LF-In ground

2. Right LF-In

3. USB (+5V) not on the internet access control module (J666) (from MY 13)

4. USB (ground)

5. Not assigned

6. Detect not on the internet access control module (J666) (from MY 13)

7. Left LF-In

8. LF-In ground shielding

9. FBAS wire (+)

10. FBAS wire (-)

11. iPod data

12. iPod data


Following pins are also still connected with the internet access control module (J666) (from MY 13).

3 USB (+5 V)
4 USB (ground)
6 Detect

D - 8-Pin Connector (T16q)





10 Data from multimedia system control head (E380)
11 Data to the multimedia system control head
12 Terminal 31
14 Res BT from multimedia system control head
15 Terminal 30
16 Ground (GND) to multimedia system control head

3 - MOST Bus





1. IN

2. OUT