1998 BMW Z3M ROADSTER Electrical Troubleshooting Manual



#"""
Pin Assignments (M Roadster)
 !""





E = Input, A = Output, M = GroundX18349
8 Pins, black
X183506 Pins, black
X18349
Pin Type Description/Function Connection
1
MGroundGround point
2AA/C-ON-signalEvaporator controller
3AA/C-ON-signalNormal speed relay
4ETerminal 15Heating blower relay
5ABlower level 1 (air-recirculation)Blower resistor
6MGround for function lightsGround point
7ETerminal 15Heating blower relay
8AActivate fresh air-recirculationFresh air-recirculation motor
X18350
Pin Type Description/Function Connection
1
Not used
2MGroundGround point
3EClimate-ON-signalAir conditioning/recirculated air operating
unit
4Not used
5AActivate A/C compressorPressure switch
6EEvaporator temperatureEvaporator temperature sensor






POWER, AIR FLOW CONTROL
 !""




#""$
INTEGRATED HEATING– AND CLIMATE CONTROL
X1001620
8 2.5 GNP90
FRONT POWER
DISTRIBUTION BOX F20
30A
X1429
X582 4
3 2 1 7 X905
X1328716 X58
2 X13233
3 2 1 4 X904
X100547 7 X33
4 X905
S2
IGNITION SWITCH
0) OFF
1) ACCESSORY
2) RUN
3) START
1 X209
86
8530
87FUSE DETAILS
0670.3
K4
BLOWER RELAY
2.5 GN/BR
2.5 GN/BR
2.5 BL
2.5 BL
2.5 BL 2.5 GN 1.5 SW1.5 GE
M30
BLOWER MOTOR
GROUND
DISTRIBUTION
0670.4 GROUND
DISTRIBUTION
0670.4R11
BLOWER
RESISTORS
1) OPENS IF
RESISTORS
OVERHEAT 1



S75
BLOWER SWITCH
0) OFF
1) SLOW
2) MEDIUM
3) FAST
4) MAXIMUM
POWER
DISTRIBUTION
0670.2
X1435
1.5 GE
6450.6-01 X683092.5 GN/BR
6450.6-01(PARTIAL)
X9633
1.5 GE 1.5 GE
210
3 4
2
10 3
Z3 ROADSTER






 !""




#""$
INTEGRATED HEATING– AND CLIMATE CONTROL


X11287
X11287
F9532A
6450.6-00
X7711
GROUND
DISTRIBUTION
0670.4
6450.6-00
.5 GN/BR1.5 GN/BR1.5 GN/BR
1.5 GE1 SW/VI
X18350
X683091 GN/BR
S531
TEMPERATURE
WHEEL SWITCH
0) NORMAL
TEMPERATURE
1) MAXIMUM
TEMPERATURE
A605
FUSE HOLDER
Y4z
WATER VALVES221
EVAPORATOR
CONTROLLER
B14
EVAPORATOR
TEMPERATURE
SENSORM111
FRESH AIR
RECIRCULATION
MOTOR S220
AIR CONDITION-
ING/RECIRCULAT-
ING SWITCH
ASSEMBLY
0) OFF
1) AIR CONDI-
TIONING
2) AIR RECIRCU-
LATING
.5 BL4
X5115
2 1
X851
X853
.5 BL
X10054
2
.5 BL
X9633
X7712
X183506.75 SW/WS
147 X18349
X183491.5 GE.5 GN
.5 GN/BR
X151713 3285
3
2
GROUND
DISTRIBUTION
0670.4GROUND
DISTRIBUTION
0670.4
6
GROUND
DISTRIBUTION
0670.4
X15172
X9633
GROUND
DISTRIBUTION
0670.4 6450.6-00 X5115
1(PARTIAL)6450.6-02
1 SW/VIX189
1 SW/VI
0101020201
Z3 ROADSTER

.5 SW/VI
&#&#






COMPRESSOR CONTROLS
INTEGRATED HEATING– AND CLIMATE CONTROL !""




#""$


15

F165A
30
87
P90
FRONT POWER
DISTRIBUTION BOX F39
7.5A
18 X10018
FUSE DETAILS
0670.3
.75 SW
2
1
21
.5 SW/BL
5 X51
4
.5 SW/BL
.5 SW/BL
X8056Y2
AIR CONDITIONING
COMPRESSOR
1) NORMAL
TEMPERATURE
2) HIGH
TEMPERATUREK19
COMPRESSOR
CONTROL RELAY
6
A6000
ENGINE CONTROL
MODULE (DME)
5 X10054
FUSE DETAILS
0670.3
6
4 X51
12 X10016
1 SW/VI
.5 VI/GR
X163
X20
X600074
86
85
.5 SW/BL
19
AC
46 X8500
A8500
TRANSMISSION
CONTROL MODULE
(EGS)
.75 BL/WS
6450.6-01
15
36 69
4–CYLINDER
Z3 ROADSTER

INTEGRATED HEATING– AND CLIMATE CONTROL





AUXILIARY FAN
 !""




#""$


.5 SW/GN
X82
1 B9
INTERMEDIATE
PRESSURE
SWITCH
1) ABOVE 18 BAR
PRESSURE
2) 15 BAR
PRESSURE
30
30K22
HIGH SPEED
RELAYK21
NORMAL SPEED
RELAY
X871 .5 SW/GR
2.5 SW/BL
X822 3
3
S36
TEMPERATURE
SWITCH
1) OPEN
2) ABOVE 99
DEGREES C
3) ABOVE 91
DEGREES C
4) OPEN M9
AUXILIARY FAN
MOTOR
8X5366 X524
X127286
87a 858786
85
X127
3
X165
X1001612
42X528
X1001820
FUSE DETAILS
0670.3
2.5 GN/RT
X10027
GROUND
DISTRIBUTION
0670.4
X53
.5 SW/GR
16 X6000
5 X20
A6000
ENGINE CONTROL
MODULE (DME)
.5 SW/GR
B8y
PRESSURE SWITCH
1) PRESSURE
BELOW 21 BAR
2) PRESSURE
ABOVE 30 BAR
3) PRESSURE
ABOVE 2.6 BAR
4) PRESSURE
BELOW 1.5 BAR
S221
EVAPORATOR
CONTROLLER
.5 VI
.5 SW/GE1
4 X10054
X183505 .5 SW/GR
GROUND
DISTRIBUTION
0670.4
B9508
PRESSURE
SWITCH
87
.5 SW/GR2.5 BL
4
X1022
.5 SW/GR25
X165
GROUND
DISTRIBUTION
0670.4
P90
FRONT POWER
DISTRIBUTION BOX
X1001612
FUSE DETAILS
0670.3
X166
15
X872
F165A
34
12F40
30AF165A
.5 SW/GR
6450.6-03
.5 SW/GR
5
6450.6-03
12
34
2 1
Z3 ROADSTER 6–CYLINDER
FUSE DETAILS
0670.3

INTEGRATED HEATING– AND CLIMATE CONTROL





AUXILIARY FAN
 !""




#""$


.35 SW/GR
X1890
1 B9
INTERMEDIATE
PRESSURE
SWITCH
1) ABOVE 18 BAR
PRESSURE
2) 15 BAR
PRESSURE
30
30K22
HIGH SPEED
RELAYK21
NORMAL SPEED
RELAY
X113791 .5 SW/GR
2.5 SW/BL
X18902 3
3
S36y
DOUBLE
TEMPERATURE
SWITCH
1) OPEN
2) ABOVE 88
DEGREES C
3) ABOVE 80
DEGREES C
4) OPEN M9
AUXILIARY FAN
MOTOR
8X5366 X524
X127386
87a 858786
85
X127
2
X165
X1001612
42X525
X15882
FUSE DETAILS
0670.3
2.5 GN/RT
X10027
GROUND
DISTRIBUTION
0670.4
X53
.5 SW/GR
11 X6000
5 X20
A6000
ENGINE CONTROL
MODULE (DME)
.5 SW/GR
B8y
PRESSURE SWITCH
1) PRESSURE
BELOW 21 BAR
2) PRESSURE
ABOVE 30 BAR
3) PRESSURE
ABOVE 2.6 BAR
4) PRESSURE
BELOW 1.5 BAR
S221
EVAPORATOR
CONTROLLER
.5 VI
.5 SW/GE1
4 X10054
X183505 .5 SW/GE
GROUND
DISTRIBUTION
0670.4
B9508
PRESSURE
SWITCH
87
.5 SW/GR4 BL
4
25
X165
GROUND
DISTRIBUTION
0670.4
P90
FRONT POWER
DISTRIBUTION
BOX
X1001612
FUSE DETAILS
0670.3
X166
15
X113792
F165A
34
12F48
40AF165A
12
34
2 1
P90
FRONT POWER
DISTRIBUTION
BOXP97
AUXILIARY FUSE
BOX
FUSE DETAILS
0670.3
0.5
X208
X203
.35 SW/GN.5 GR/VI
X600068
A6000
ENGINE CONTROL
MODULE (DME)X600057
.5 RT/WS
Z3 ROADSTER 4–CYLINDER

1.5 GE






POWER, AIR FLOW CONTROL
 !""




#""$
INTEGRATED HEATING– AND CLIMATE CONTROL
X1001620
8 2.5 GNP90
FRONT POWER
DISTRIBUTION BOX F20
30A
X1429
X582 4
3 2 1 7 X905
X1328716 X58
2 X13233
3 2 1 4 X904
X100547 7 X33
4 X905
S2
IGNITION SWITCH
0) OFF
1) ACCESSORY
2) RUN
3) START
1 X209
86
8530
87FUSE DETAILS
0670.3
K4
BLOWER RELAY
2.5 GN/BR
2.5 GN/BR
2.5 BL
2.5 BL
2.5 BL 2.5 GN 1.5 SW1.5 GE
M30
BLOWER
MOTOR
GROUND
DISTRIBUTION
0670.4 GROUND
DISTRIBUTION
0670.4R11
BLOWER
RESISTORS
1) OPENS IF
RESISTORS
OVERHEAT


S75
BLOWER SWITCH
0) OFF
1) SLOW
2) MEDIUM
3) FAST
4) MAXIMUM
POWER DISTRIBUTION
0670.2
X1435
1.5 GE
6450.6-06 X68309
2.5 GN/BR
6450.6-06(PARTIAL)
1.5 GE
2.5 GN/BR
X1280
X9633
2 8 X50
6
X504
K33a
AIR CONDITIONING
RELAY, MOTRONIC30 86
87 85
GROUND
DISTRIBUTION
0670.4
19 X6000
5
6 X20
A6000
ENGINE CONTROL
MODULE (DME) .5 VI/GR
.5 SW/VIX10054
2 X35
X353
X189
6450.6-06
X9633
1.5 GE 2.5 GN/BR .5 SW/VI1.5 SW/VI(PARTIAL)
1 SW/VI
1
2
10
3
210
3 4
M ROADSTER






 !""




#""$
INTEGRATED HEATING– AND CLIMATE CONTROL



01
6450.6-05
X7711
1 GN/BR
1 SW/VI
X18350
1 GN/BR
S221
EVAPORATOR
CONTROLLER
B14
EVAPORATOR
TEMPERATURE
SENSORM111
FRESH AIR
RECIRCULATION
MOTOR S220
AIR CONDITIONING/
RECIRCULATING
SWITCH ASSEMBLY
0) OFF
1) AIR CONDITION-
ING
2) AIR RECIRCULAT-
ING
X9633
X7712
X1835061 SW/WS
47 X18349
X183491.5 GE.5 GN
.5 GN/BR
X151713 285
3
2
GROUND
DISTRIBUTION
0670.4GROUND
DISTRIBUTION
0670.4
6
GROUND
DISTRIBUTION
0670.4
X15172
X9633
GROUND
DISTRIBUTION
0670.4 6450.6-05 (PARTIAL)
6450.6-08
1 SW/VIX189
2
01
1.5 GE
3
1
GROUND
DISTRIBUTION
0670.4
6450.6-05
X68309(PARTIAL)
.5 GN/BR
1 X11287
X112874
A605
FUSE HOLDER
2 X5115
X5115
.5 BL1
0
1
X85GROUND
DISTRIBUTION
0670.4
X100542
1 X85
Y4z
WATER VALVE
3 1 BL
0
20
F9532AS531
TEMPERATURE
WHEEL SWITCH
0) NORMAL
TEMPERATURE
1) MAXIMUM
TEMPERATURE
.5 BL
M ROADSTER