Sound System Connector Assignments, Bang & OLUFSEN, MMI

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Fig 1: Digital Sound System Control Module -J525-

Courtesy of AUDI OF AMERICA, LLC

A -

MOST Bus

B -

Black 18-pin connector (T18b)

C -

Black 32-pin connector (T32h)

NOTE:

Unlisted connector terminals are not assigned.

Fig 2: 2 - MOST Bus

Courtesy of AUDI OF AMERICA, LLC

Input
Output

Fig 3: 18-Pin Connector

Courtesy of AUDI OF AMERICA, LLC

1 -

Microphone input 1 (+) from Microphone Unit In Front Roof Module -R164- (Interior Microphone -R74-)

2 -

Microphone input 1 (Ground Shielding) from Microphone Unit In Front Roof Module -R164- (Interior Microphone -R74-)

10 -

Microphone input 1 (-) from Microphone Unit In Front Roof Module -R164- (Interior Microphone -R74-)

17 -

Ring-break Diagnostic Cable

Fig 4: B - Black 32-Pin Connector (T32h)

Courtesy of AUDI OF AMERICA, LLC

1 -

Terminal 30

2 -

Terminal 31

3 -

Left Rear Speaker (+)

4 -

Right Rear Speaker (+)

5 -

Center Mid-Treble Speaker -R158- (+)

6 -

Left Front Speaker (+)

7 -

Right Front Speaker (-)

8 -

Left Rear Midrange Speaker -R105- (+)

9 -

Right Rear Midrange Speaker -R106- (+)

10 -

Right Front Bass Speaker -R23- (+)

15 -

Left Rear Speaker (-)

16 -

Right Rear Speaker (-)

17 -

Center Mid-Treble Speaker -R158- (-)

18 -

Left Front Speaker (+)

19 -

Right Front Speaker (-)

20 -

Left Rear Midrange Speaker -R105- (-)

21 -

Right Rear Midrange Speaker -R106- (-)

22 -

Right Front Bass Speaker -R23- (-)

23 -

Left Front Bass Speaker -R21- (+)

25 -

Subwoofer in Rear Shelf -R157- (+)

28 -

Left Front Bass Speaker -R21- (-)

30 -

Subwoofer in Rear Shelf -R157- (-)