BM
BMW
BMW
BMW
Z3
3234.0Ća
1999
Pin Assignments
03/00
E = Input, A = Output, M = Ground
X74
Pin
Type
Description/Function
Connection
1
A
Pyrotechnical belt tensioner (+)
Driver’s side pyrotechnical belt tensioner
2
A
Pyrotechnical belt tensioner (–)
Driver’s side pyrotechnical belt tensioner
3
A
Pyrotechnical belt tensioner (+)
Passenger’s side pyrotechnical belt
tensioner
4
A
Pyrotechnical belt tensioner (–)
Passenger’s side pyrotechnical belt
tensioner
5
E
Power supply
Front power distribution box, fuse 41
6
M
Ground
Ground point
7
A
Air bag warning indicator
Instrument cluster
8
E
Belt switch
Passenger’s seat belt switch
9
E/A
TxD diagnostic data line
Data link connector
10
A
Air bag (+)
Driver’s air bag gas generator
11
A
Air bag (–)
Driver’s air bag gas generator
12
E
Belt switch
Driver’s seat belt switch
13
A
Air bag (+)
Passenger’s air bag gas generator
14
A
Air bag (–)
Passenger’s air bag gas generator
15
E
Seat occupancy detector
Seat occupancy detector
16
A
Gas generator
Gas generator, left side air bag
17
A
Gas generator
Gas generator, left side air bag
18
A
Gas generator
Gas generator, right side air bag
19
A
Gas generator
Gas generator, right side air bag
20
E
Impact sensor
Driver’s side impact sensor
21
E
Impact sensor
Passenger’s side impact sensor
22
Not used
23
Not used
24
Not used
25
Not used
26
Not used
27
Not used
28
Not used
29
Not used