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BMW E46 Airbag Control Module (MRS) Wiring Description
|
Functions on X74, 50-pin Dual Row Connector
|
|||||
|
Wire Size/Color
|
Function
|
Pin
|
Pin
|
Function
|
Wire Size/Color
|
| 0.5 GE/RT | GSF+ Driver's seat belt tensioner + |
1
|
26
|
MRS-II Not used MRS-III/IV ABF2+ Driver's airbag inflator stage 2 + |
0.5 GR/SW |
| 0.5 GE/BR | GSF-- Driver's seat belt tensioner - |
2
|
27
|
MRS-II Not used MRS-III/IV ABF2-- Driver's airbag inflator stage 2 - |
0.5 GR/BR |
| 0.5 BL/RT | GSBF+ Passenger's seat belt tensioner + |
3
|
28
|
Not used | |
| 0.5 BL/BR | GSBF+ Passenger's belt tensioner - |
4
|
29
|
Not used | |
| 0.5 VI/BL | R<11 Fuse 11, Terminal R |
5
|
30
|
Not used | |
| 0.5 BR/SW | 31E/AB Ground |
6
|
31
|
KEY | |
| 0.35 BR/VI | AWL Instrument cluster airbag warning LED |
7
|
32
|
KEY | |
| 0.35 BL/VI/GE | USD_LHD GKBF Passenger seat belt buckle sensor not USD_LHD not used |
8
|
33
|
MRS-II Not used MRS-III/IV ABBF2+ Passenger front airbag inflator stage 2+ |
0.5 WS/SW |
| 0.35 WS/RT/GE | K--BUS K-Bus |
9
|
34
|
MRS-II Crash output to general module MRS-III/IV Not used |
|
| 0.5 GE/SW | ABF+ Driver's airbag inflator stage 1 + |
10
|
35
|
Not used | |
| 0.5 GE/BR | ABF-- Driver's airbag inflator stage 1 - |
11
|
36
|
Not used | |
| 0.35 BL/WS | GKF Driver's seat belt buckle sensor |
12
|
37
|
Not used | |
| 0.5 BL/SW | ABBF+ Passenger airbag inflator stage 1 + |
13
|
38
|
Not used | |
| 0.5 BL/BR | ABBF-- Passenger airbag inflator stage 1 - |
14
|
39
|
Not used | |
| 0.5 WS/RT | SBE Passenger seat occupancy sensor |
15
|
40
|
MRS-II Not used MRS-III/IV ABBF2-- Passenger front airbag inflator stage 2 - |
0.5 WS/BR |
| 0.5 GE | SAVL+ Front passenger door airbag inflator + |
16
|
41
|
Not used | |
| 0.5 BR | SAVL-- Front passenger door airbag inflator - |
17
|
42
|
Not used | |
| 0.5 BL | SAVR+ Front driver's door airbag inflator + |
18
|
43
|
NO PIN | |
| 0.5 BR | SAVR-- Front driver's door airbag inflator - |
19
|
44
|
NO PIN | |
| 0.35 GE/GN | SACSL Impact sensor left side |
20
|
45
|
ITSAL+ Driver's head airbag inflator + | 0.5 GE |
| 0.35 GE/RT | SACSR Impact sensor right side |
21
|
46
|
ITSAL-- Driver's head airbag inflator - | 0.5 BL/GE |
| 0.5 GN | SAHL+ Rear left side airbag inflator + |
22
|
47
|
ITSAR+ Passenger's head airbag inflator + | 0.5 WS |
| 0.5 BL/GN | SAHL-- Rear left side airbag inflator - |
23
|
48
|
ITSAR-- Passenger's head airbag inflator - | 0.5 BL/WS |
| 0.5 RT | SAHR+ Rear right side airbag inflator + |
24
|
49
|
BPT+ Battery safety terminal + | 0.5 BL |
| 0.5 BL/RT | SAHR-- Rear right side airbag inflator - |
25
|
50
|
BPT-- Battery safety terminal - | 0.5 BR |
Terminal R - +12V in Acc, On and Start
Terminal 15 - +12V in On and Start
Terminal 30 - +12V Constant power
|
Color Code
|
Color
|
|
SW
|
Black
|
|
BR
|
Brown
|
|
RT
|
Red
|
|
GE
|
Yellow
|
|
GN
|
Green
|
|
BL
|
Blue
|
|
VI
|
Violet
|
|
GR
|
Gray
|
|
WS
|
White
|
| Wire Size (mm2) | AWG equivalent |
| 0.35 | 20 |
| 0.50 | 18 |
| 0.75 | 16-17 |
| 1.0 | 15-16 |
| 2.5 |