1999 BMW Z3M COUPE Electrical Troubleshooting Manual





Pin Assignments





E = Input, A = Output, M = GroundPin ConnectionDescription/Function Type
30
Not used
31Not used
32Not used
33Not used
34ACrash signalBody electronics control module (ZKE IV)
35Not used
36Not used
37Not used
38Not used
39Not used
40Not used
41Not used
42Not used
43Not used
44Not used
45Not used
46Not used
47Not used
48Not used
49Not used
50Not used



SUPPLEMENTAL RESTRAINT SYSTEM (AIR BAG)









X1614
FUSE DETAILS
0670.3
A2w
INSTRUMENT
CLUSTER
10) AIR BAG X16
23
.5 GE/SW.5 GE/BR
1 X7832
G5
DRIVER’S AIR BAG
GAS GENERATOR
C101
CONTACT RING
14
34
.35 BR/SW
6
GROUND
DISTRIBUTION
0670.4
5
FUSE DETAILS
0670.3 22P90
FRONT POWER
DISTRIBUTION BOX
10 11
F275A

7
.5 BR/VI
CA
X10018
F4115A
10
1 X9997
2 .5 BR.5 BL
R
ABF+ ABF– 31THE DRIVER’S AND
PASSENGER’S
AND THE SIDE AIR
BAG GENERA-
TORS AND THE
PYROTECHNICAL
BELT TENSIONERS
ARE FITTED WITH
SHORTING
BRIDGES.THE BRIDGES SHORT
THE GENERATOR
LEADS TOGETHER TO
PREVENT UNINTEN-
TIONAL TRIGGERING
OF THE IGNITER
WHEN WORKING ON
THE AIR BAG SYSTEM.
X10017
X132537A104
BODY
ELECTRONICS
CONTROL MODULE
(ZKE IV)
X74
AWL
.5 GE/RT.5 GE/BR
1 X102142
G12
DRIVER’S SIDE
PYROTECHNICAL
BELT TENSIONER
12
1 X102162 .5 GE/RT
.5 GE/BR
.5 BL/RT.5 BL/BR
1 X102152
G13
PASSENGER’S
SIDE
PYROTECHNICAL
BELT TENSIONER
34
1 X102172 .5 GE/RT
.5 GE/BR
A12
SUPPLEMENTAL
RESTRAINT
SYSTEM CONTROL
MODULE
X74



SUPPLEMENTAL RESTRAINT SYSTEM (AIR BAG)








FUSE DETAILS
0670.3 24FUSE DETAILS
0670.3 8P90
FRONT POWER
DISTRIBUTION BOX
F425A
15 .5 WS/RT
X10017
F2410A
3
A113
SEAT OCCUPANCY
DETECTOR
SBE
4
5
12
GROUND
DISTRIBUTION
0670.4
S559 *
PASSENGER’S AIR
BAG CUT–OFF
SWITCH
1) PASSENGER’S
AIR BAG
SWITCHED ON
2) PASSENGER’S
AIR BAG
SWITCHED OFFX10218
2
1X10218
A12
SUPPLEMENTAL
RESTRAINT
SYSTEM CONTROL
MODULE
GROUND
DISTRIBUTION
0670.4
X10018
3
6 12212
G6
PASSENGER’S AIR
BAG GAS
GENERATOR
13 14
1 X7822 .5 BL/SW
.5 BL/BR
ABBF+ ABBF–
1
X19565
* THE ORIGINAL
JUMPER IS OP-
TIONALLY RE-
PLACED BY THE
SWITCH S559. X74
.5 BL/SW .5 BL/RRX74
X19565






.5 BL/SW .5 BL/RR
12
X91009
I1008
SEAT MAT
51 X19565
6 2 X19565



SUPPLEMENTAL RESTRAINT SYSTEM (AIR BAG)








4
FUSE DETAILS
0670.3 22P90
FRONT POWER
DISTRIBUTION BOX




X10018
F4115A
DATA LINK
0670.5
.5 WS/VI
TXD
X74
X185181
14 X17
A2w
INSTRUMENT
CLUSTER
8.5 BL/WS/GE
3
12
GROUND
DISTRIBUTION
0670.4
S59
PASSENGER’S
SEAT BELT SWITCH
1) BELT UN-
BUCKLED
2) BELT BUCKLED
1 2
12
.5 BR/GN/WS
3
X7781
S58
DRIVER’S SEAT
BELT SWITCH
1) BELT UN-
BUCKLED
2) BELT BUCKLED
GROUND
DISTRIBUTION
0670.4
X18518NOT USED
2.5 BL/VI/GE
GKBF GKFA12
SUPPLEMENTAL
RESTRAINT
SYSTEM CONTROL
MODULE
2 X778
NOT USED
4
NOT USED
9
X74
FUSE DETAILS
0670.3



SUPPLEMENTAL RESTRAINT SYSTEM (AIR BAG)
SIDE AIR BAG









A12
SUPPLEMENTAL
RESTRAINT
SYSTEM CONTROL
MODULE
FUSE DETAILS
0670.3
.35 WS/BL
P90
FRONT POWER
DISTRIBUTION BOX
X10018
22
20
G14
LEFT SIDE AIR BAG
GAS GENERATOR
16 17
.5 BL .5 BR
1
2 X1885B78
DRIVER’S SIDE IM-
PACT SENSOR
F4115A
.5 GE
33
B79
PASSENGER’S
SIDE IMPACT
SENSOR
1X1885
GROUND
DISTRIBUTION
0670.4
25 26
.5 BR
12
G15
RIGHT SIDE AIR
BAG GAS
GENERATOR
1819
.5 GE .5 BR
25 26
.5 BR
12
.5 BLX257
X1883
X256
X1884
X74
.5 VI/BL
2 X1886
X1886GROUND
DISTRIBUTION
0670.4
X7421 .35 WS/GE
X10010
THE DRIVER’S AND
PASSENGER’S AND
THE SIDE AIR BAG
GENERATORS AND
THE
PYROTECHNICAL
BELT TENSIONERS
ARE FITTED WITH
SHORTING
BRIDGES.THE BRIDGES
SHORT THE
GENERATOR
LEADS TOGETHER
TO PREVENT
UNINTENTIONAL
TRIGGERING OF
THE IGNITER
WHEN WORKING
ON THE AIR BAG
SYSTEM.
X10010
.5 VI/BL





3
3450.1-013450.1-02
3450.1-00
Y1
ABS HYDRAULIC
UNITP90
FRONT POWER
DISTRIBUTION BOX
K94
ENGINE CONTROL
RELAY (ABS/ASC)
A52
SLIP CONTROL
MODULE
(ABS/ASC)
48 X1175
TXD 46
2619302
S30
BRAKE LIGHT
SWITCH F49
50AF4615A
55
3450.1-03
53
M93
AUXILIARY
THROTTLE
POSITION MOTOR
(ADS) 3450.1-022339 43
R31
AUXILIARY
THROTTLE
POSITION SENSOR 3450.1-02 67
10 36
B2
LEFT FRONT
SPEED SENSOR –
ABS 3450.1-0412 13
B4
LEFT REAR SPEED
SENSOR – ABS 3450.1-0414 15
B1
RIGHT FRONT
SPEED SENSOR –
ABS 3450.1-0411 38
B3
RIGHT REAR
SPEED SENSOR –
ABS 3450.1-0488778118
A6000
ENGINE CONTROL
MODULE (DME) 3450.1-08
76
3354275225634493151
F1030AF135A
S6
ASC SWITCH 3450.1-03
44
LIGHT SWITCH
DETAILS
6300.0
3450.1-03
58g
X1175
2035
3450.1-06
29 X117528
S31
PARK BRAKE
SWITCH 3450.1-02
P95
AUXILIARY FUSE
BOX
F3830A
P90
FRONT POWER
DISTRIBUTION BOX
3450.1-02
A2w
INSTRUMENT
CLUSTER
M VERSIONS
37
!
7124
G6509
GENERATOR
F275A
K95
VALVE RELAY
(ABS/ASC) 3450.1-00
3450.1-00
1230.0 D +
3450.1 SLIP CONTROL (ABS/ASC)





F215A
3450.1-06P90
FRONT POWER
DISTRIBUTION BOX
A52
SLIP CONTROL
MODULE
(ABS/ASC)
13 X1170
8 X1170
TXD 7
!
F275A
A2w
INSTRUMENT
CLUSTER
S30
BRAKE LIGHT
SWITCH F10
30AF4615A
3450.1-05
3450.1-05
12
B2
LEFT FRONT
SPEED SENSOR –
ABS 3450.1-075 6
B4
LEFT REAR SPEED
SENSOR – ABS 3450.1-0719 20
B1
RIGHT FRONT
SPEED SENSOR –
ABS 3450.1-0723 22
B3
RIGHT REAR
SPEED SENSOR –
ABS 3450.1-07211110
A6000
ENGINE CONTROL
MODULE (DME) 3450.1-06A2w
INSTRUMENT
CLUSTER 3450.1-06
9
F215A
S6
ASC SWITCH 3450.1-06
14
LIGHT SWITCH
DETAILS
6300.0
1643450.1-05
58g
X1170
Z3 VERSIONS
24
F3830A
25
SLIP CONTROL (ABS/ASC)



Pin Assignments







E = Input, A = Output, M = Ground
X1175
Pin Type Description/Function Connection
51
EVoltage supplyFuse 13
52ALeft front inlet valveABS hydraulic unit
53AVoltage supplyValve – Engine control relay
54Not used
55Not used
56ARight rear inlet valveABS hydraulic unit
57AActivate relayEngine control relay
58Not used
59Not used
60MSensor groundABS speed sensor front left
61ESpeed signalABS speed sensor rear right
62MSensor groundABS speed sensor rear left
63ESpeed signalABS speed sensor rear left
64MSensor groundABS speed sensor front right
65ESpeed signalABS speed sensor front right
66Not used
67Not used
68EEngine signal 1Engine control module (DME)
69ERelay activation feedbackEngine control relay
70ESpeed signalEngine control module (DME)
71Not used
72Not used
73AADS step motor (+)ADS step motor
74ECharge indicatorGenerator
75ALeft rear outlet valveABS hydraulic unit
76AShut-off valve (ASC)ABS hydraulic unit
77ARight front outlet valveABS hydraulic unit
78MGroundGround point
79MGroundGround point
80AABS lamp controlInstrument cluster