1999 BMW 318ti Electrical Troubleshooting Manual

.5 GR/BR
ELECTRONIC TRANSMISSION CONTROL (EGS A4S 270R)


SHIFT LOCK, DATA LINK, KICK–DOWN SWITCH







15
5V (15)
25
34 6 18 X8500
X85071X69
17 25X16
5A2w
INSTRUMENT
CLUSTER
A8500
TRANSMISSION
CONTROL MODULE
(EGS)
S8507
KICK–DOWN
SWITCH
1) NORMAL
2) ACCELERATOR
PEDAL FULLY
DEPRESSED GROUND
DISTRIBUTION
0670.4 .5 GR/BR
.75 GR/GE
1.5 SWAUSF
X1001832F46
15AP90
FRONT POWER
DISTRIBUTION BOX
X6912
10.5 BL/RT .75 BL/RT
BRAKE LIGHTS
6325.0X181
1.5 BL/RT
FUSE DETAILS
0670.3
1 2
31
S30
BRAKE LIGHT
SWITCH
1) BRAKE PEDAL
RELEASED
2) BRAKE PEDAL
DEPRESSED
87 .5 WS/GE
RXD88 .5 WS/VI
TXD
DATA LINK
0670.5
GROUND
DISTRIBUTION
0670.4
X781
2 1
2X78





 

60 .75 WS/GNX8500
X6454
28
GROUND
DISTRIBUTION
0670.4
F275A
23 X16
FUSE DETAILS
0670.3
X1001714
48
X78
3X69
11 .5 BR/GR
43
.5 BR/GR
4 X78
GROUND
DISTRIBUTION
0670.4
X173
57
7 14 .35 GE/BR
S30
BRAKE LIGHT
SWITCH
3) BRAKE PEDAL
DEPRESSED
(TEST)
4) BRAKE PEDAL
RELEASED
(NORMAL)
.35 GE/BR
A8
CRUISE CONTROL
MODULE
(TEMPOMAT) X22
!




A2w
INSTRUMENT
CLUSTER
A12
SUPPLEMENTAL
RESTRAINT
SYSTEM CONTROL
MODULE20
A113
SEAT OCCUPANCY
DETECTOR 3234.0-03
F427.5A
2112
F275AP90
FRONT POWER
DISTRIBUTION BOX
34X74
X74
159
A104
BODY
ELECTRONICS
CONTROL MODULE
(ZKE IV)
8
G6
PASSENGER’S AIR
BAG GAS
GENERATOR
13 14
3234.0-00
G5
DRIVER’S AIR BAG
GAS GENERATOR
C101
CONTACT RING
10 11
G14
LEFT SIDE AIR BAG
GAS GENERATOR
16 17
3234.0-01G15
RIGHT SIDE AIR
BAG GAS
GENERATOR
18 19
3234.0-01G12
DRIVER’S SIDE
PYROTECHNICAL
BELT TENSIONER
12
3234.0-02G13
PASSENGER’S
SIDE
PYROTECHNICAL
BELT TENSIONER
34
3234.0-02
B78
DRIVER’S SIDE
IMPACT SENSORB79
PASSENGER’S
SIDE IMPACT
SENSORS59
PASSENGER’S
SEAT BELT SWITCHS58
DRIVER’S SEAT
BELT SWITCH
57
3234.0-01 3234.0-013234.0-023234.0-023234.0-02 3234.0-00
D100
DATA LINK
CONNECTOR 3234.0-02
3234.0-006
3234.0-000670.5
TXD
I1008
SEAT MAT
3234.0 SUPPLEMENTAL RESTRAINT SYSTEM (AIR BAG)


 



 
Pin Assignments


E = Input, A = Output, M = Ground
X74
Pin Type Description/Function Connection
1
APyrotechnical belt tensionerDriver’s side pyrotechnical belt tensioner
2APyrotechnical belt tensionerDriver’s side pyrotechnical belt tensioner
3APyrotechnical belt tensionerPassenger’s side pyrotechnical belt
tensioner
4APyrotechnical belt tensionerPassenger’s side pyrotechnical belt
tensioner
5EPower supplyFront power distribution box, fuse 42
6MGroundGround point
7AAir bag warning indicatorInstrument cluster
8EBelt switchPassenger’s seat belt switch
9E/ATxD diagnostic data lineData link connector
10AAir bag (+)Driver’s air bag gas generator
11AAir bag (–)Driver’s air bag gas generator
12EBelt switchDriver’s seat belt switch
13AAir bag (+)Passenger’s air bag gas generator
14AAir bag (–)Passenger’s air bag gas generator
15ESeat occupancy detectorSeat occupancy detector
16AGas generatorGas generator, left side air bag
17AGas generatorGas generator, left side air bag
18AGas generatorGas generator, right side air bag
19AGas generatorGas generator, right side air bag
20EImpact sensorDriver’s side impact sensor
21EImpact sensorPassenger’s side impact sensor
22Not used
23Not used
24Not used
25Not used
26Not used
27Not used
28Not used
29Not used


 




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
X1426
A12
SUPPLEMENTAL
RESTRAINT
SYSTEM CONTROL
MODULE
FUSE DETAILS
0670.3
A2w
INSTRUMENT
CLUSTER
10) AIR BAG X16
23
.5 BL/SW
.5 GE/SW.5 GE/BR
1 X7832
G5
DRIVER’S AIR BAG
GAS GENERATOR
.5 BR.5 BLC101
CONTACT RING
DATA LINK
0670.5
.5 WS/VI
TXD
79
12 X9997
.5 BL/SW
G6
PASSENGER’S AIR
BAG GAS
GENERATOR 1 2 X782
13 14
.5 BL/SW .5 BL/BR
X746
X1441
GROUND
DISTRIBUTION
0670.4
5
FUSE DETAILS
0670.3 24 X10018
P90
FRONT POWER
DISTRIBUTION BOX
10 11
X1001714
F427.5AF275A
10
31.5 VI/GN
X74





 

SUPPLEMENTAL RESTRAINT SYSTEM (AIR BAG)






1
A12
SUPPLEMENTAL
RESTRAINT
SYSTEM CONTROL
MODULE
FUSE DETAILS
0670.3
B78
DRIVER’S SIDE IM-
PACT SENSOR X1885
2
.35 WS/BL
20
G14
LEFT SIDE AIR BAG
GAS GENERATOR
16 17
.5 BL
X13009
GROUND
DISTRIBUTION
0670.4
X1001824
P90
FRONT POWER
DISTRIBUTION BOX
F427.5A
X18853
GROUND
DISTRIBUTION
0670.41
B79
PASSENGER’S
SIDE IMPACT
SENSOR X18862
X18863
25 X25726
1 X18832
.5 BR .5 BR
.5 BL
G15
RIGHT SIDE AIR
BAG GAS
GENERATOR
18 19
.5 GE
25 X25626
1 X18842
.5 BR .5 BR
.5 GE
21
.35 WS/GE
X74
X13009
THE DRIVER’S AND
PASSENGER’S AND
SIDE AIR BAG GEN-
ERATORS 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.
X74
.35 VI/GN.35 VI/GN





 

SUPPLEMENTAL RESTRAINT SYSTEM (AIR BAG)






1
A12
SUPPLEMENTAL
RESTRAINT
SYSTEM CONTROL
MODULE
FUSE DETAILS
0670.3
S58
DRIVER’S SEAT
BELT SWITCH X778
4
12
G12
DRIVER’S SIDE
PYROTECHNICAL
BELT TENSIONER
12
.5 GE/BR
X13009
GROUND
DISTRIBUTION
0670.4
X1001824P90
FRONT POWER
DISTRIBUTION BOX
F427.5A
X7783
GROUND
DISTRIBUTION
0670.4
1
S59
PASSENGER’S
SEAT BELT SWITCH X185184
X185183
1 X112892
1 X102162
.5 GE/RT
G13
PASSENGER’S
SIDE
PYROTECHNICAL
BELT TENSIONER
34
.5 BL/RT
1 X102172
.5 BL/BR
8
X74
NOT USED7
34 .35 BR/SW
A104
BODY
ELECTRONICS
CONTROL MODULE
(ZKE IV)
X13253X1714
2FUSE DETAILS
0670.3
A2w
INSTRUMENT
CLUSTER X16
23
.5 BL/VI/GE
X1001714
F275A
X13009
152.5 BL/VI/GEX13
.5 BL/GN/GE.5 BL/RT/WS
1 X11290
2
.5 GE/BR .5 GE/RT .5 BL/RT .5 BL/BRX74
.35 VI/GN.35 VI/GN





 








X102181
3
12
15 X74
2 X10218
X13009
A12
SUPPLEMENTAL
RESTRAINT
SYSTEM CONTROL
MODULEGROUND
DISTRIBUTION
0670.4
A113
SEAT OCCUPANCY
DETECTOR
I1008
SEAT MAT X91009
FUSE DETAILS
0670.3
24 X10018
.5 WS/RT
F427.5AP90
FRONT POWER
DISTRIBUTION BOX
SUPPLEMENTAL RESTRAINT SYSTEM (AIR BAG)