Digital Sound System Control Module -J525-, Connector Views, W/MMI Navigation Plus (I8H)

1. 38-Pin Connector -T38-/18-Pin Connector -T18i-

Courtesy of AUDI OF AMERICA, LLC

T18i (B)	Designation
1
2
3
4
5
6	Noise reduction microphone 3 R2871
7	Noise reduction microphone 3 R2871
8	Noise reduction microphone 1 R2851
9	Noise reduction microphone 1 R2851
10	Engine Control Module (ECM) J6231 Subframe Mount Control Module J9311
11	Terminal 31, to 397 Ground Connection 32 (in main wiring harness)1 Exhaust Flap Control Module J8831
12
13	Noise reduction microphone 4 R2881
14	Noise reduction microphone 4 R2881
15
16	Noise reduction microphone 2 R2861
17	Noise reduction microphone 2 R2861
18

T38 (A)	Designation
1	Terminal 30, from Fuse panel 4 ST4 Fuse Panel F SF
2	Terminal 31, to 50 Ground Connection (in left luggage compartment)
3
4	Subwoofer R211
5
6
7	Left Rear Bass Speaker R15 Left Rear Treble Speaker R14
8	Right Rear Bass Speaker R17 Right Rear Treble Speaker R16
9	Left effects speaker R209
10	Right effects speaker R210
11	Left Front Bass Speaker R21
12	Left Front Bass Speaker R21
13	Right Front Bass Speaker R23
14	Right Front Bass Speaker R23
15
16	Subwoofer R211
17
18
19	Left Rear Bass Speaker R151(1) Left Rear Treble Speaker R14
20	Right Rear Bass Speaker R17 Right Rear Treble Speaker R16
21	Left effects speaker R209
22	Right effects speaker R210
23
24
25	Ringbreak Diagnosis Wire B444 OBD connection 1 (in main wiring harness)
26	Right Front Midrange Speaker R104
27	Right Front Midrange Speaker R104
28	Ground-shielding Microphone Unit (in front roof module) R164
29	Inside Microphone R74 Microphone Unit (in front roof module) R164
30	Inside Microphone R74 Microphone Unit (in front roof module) R164
31	Center speaker R208
32	Center speaker R208
33	Right Front Treble Speaker R22
34	Right Front Treble Speaker R22
35	Left Front Treble Speaker R20
36	Left Front Treble Speaker R20
37	Left Front Midrange Speaker R103
38	Left Front Midrange Speaker R103
(1) only for vehicles with noise cancellation ANC (EP1)