1999 BMW Z3M COUPE air conditioning






.0
P90
FRONT POWER
DISTRIBUTION BOX
K19
COMPRESSOR
CONTROL RELAY 6450.6-02
F397.5AF165A
Y2
AIR CONDITIONING
COMPRESSOR 6450.6-02
A6000
ENGINE CONTROL
MODULE (DME) 6450.6-02
K4
BLOWER RELAY 6450.6-00 F20
30A
S220
AIR CONDITION-
ING/RECIRCULAT-
ING SWITCH
ASSEMBLY
41
R11
BLOWER
RESISTORS 6450.6-00
S75
BLOWER SWITCH 6450.6-00
M30
BLOWER MOTOR 6450.6-00
3258
3
A2w
INSTRUMENT
CLUSTER 6450.6-01B14
EVAPORATOR
TEMPERATURE
SENSOR 6450.6-01
6 X18349
7 X18349
M111
FRESH AIR
RECIRCULATION
MOTOR 6450.6-01
S531
TEMPERATURE
WHEEL SWITCH 6450.6-01
A605
FUSE HOLDER
F953
2A
6450.6-02 6450.6-00
6450.6-01
6
Y4z
WATER VALVE 6450.6-01
P90
FRONT POWER
DISTRIBUTION BOX
K22
HIGH SPEED
RELAY
B9
INTERMEDIATE
PRESSURE
SWITCH
S36
TEMPERATURE
SWITCHM9
AUXILIARY FAN
MOTORK21
NORMAL SPEED
RELAY
6450.6-036450.6-03
6450.6-036450.6-03
6450.6-03 6450.6-03
B8y
PRESSURE
SWITCH
A2w
INSTRUMENT
CLUSTER 6450.6-03
B9508
PRESSURE
SWITCH
F165AF4030A
S221
EVAPORATOR
CONTROLLER
5 X18350
F2410A
AUXILIARY FAN
2
X18350
Z3 VERSIONS
6450.6 INTEGRATED HEATING– AND CLIMATE CONTROL







M VERSIONS
P97
AUXILIARY FUSE
BOX
K21
NORMAL SPEED
RELAY
S36
TEMPERATURE
SWITCHK22
HIGH SPEED
RELAY 6450.6-07
6450.6-076450.6-07
F165AF4840A
A6000
ENGINE
CONTROL
MODULE (DME) 6450.6-07
P90
FRONT POWER
DISTRIBUTION BOXP90
FRONT POWER
DISTRIBUTION BOX F16
5A
M9
AUXILIARY FAN
MOTOR 6450.6-07
P90
FRONT POWER
DISTRIBUTION BOX
K19
COMPRESSOR
CONTROL RELAY 6450.6-06
F397.5AF165A
Y2
AIR CONDITIONING
COMPRESSOR 6450.6-06
A6000
ENGINE CONTROL
MODULE (DME) 6450.6-06
K4
BLOWER RELAY 6450.6-04 F20
30A
S220
AIR CONDITION-
ING/RECIRCULAT-
ING SWITCH
ASSEMBLY
43
R11
BLOWER
RESISTORS 6450.6-04
S75
BLOWER SWITCH 6450.6-04
M30
BLOWER MOTOR 6450.6-04
1258
S221
EVAPORATOR
CONTROLLER
3
A6000
ENGINE CONTROL
MODULE (DME) 6450.6-04
B14
EVAPORATOR
TEMPERATURE
SENSOR 6450.6-05
26
X18349
X18350
7 X18349
M111
FRESH AIR
RECIRCULATION
MOTOR 6450.6-05
S531
TEMPERATURE
WHEEL SWITCH 6450.6-05
A605
FUSE HOLDER
F953
2A
S2
IGNITION SWITCH 6450.6-046450.6-06 6450.6-04
6450.6-05
K33a
AIR CONDITIONING
RELAY, MOTRONIC 6450.6-04
6
Y4z
WATER VALVE 6450.6-05
B9
INTERMEDIATE
PRESSURE
SWITCHB8y
PRESSURE
SWITCH
5 X18350
B9508
PRESSURE
SWITCH 6450.6-07 6450.6-07
NOT USEDNOT USED 6450.6-07
6450.6-07
AUXILIARY FAN
INTEGRATED HEATING– AND CLIMATE CONTROL




Pin Assignments (Z3 Versions)





E = Input, A = Output, M = GroundX18349
8 Pins, black
X183506 Pins, black
X18349
Pin Type Description/Function Connection
1
ETerminal 15Heating blower relay
2AActivate compressor clutchInstrument cluster
3ABlower level 1 (air conditioning)Blower resistor
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




Pin Assignments (M Versions)





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




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
Y2
AIR CONDITIONING
COMPRESSOR
1) NORMAL
TEMPERATURE
2) HIGH
TEMPERATUREK19
COMPRESSOR
CONTROL RELAY
A6000
ENGINE CONTROL
MODULE (DME) FUSE DETAILS
0670.3
6
4 X51
12 X10016
X163
X600042986
85
Z3 VERSIONS

M30
BLOWER MOTOR1.5 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
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
6450.6-05 X68309
2.5 GN/BR
6450.6-05(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
6450.6-05
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 VERSIONS












INTEGRATED HEATING– AND CLIMATE CONTROL


01
6450.6-04
X7711
1 GN/BR
1 SW/VI
X18350
1.5 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 6450.6-04 (PARTIAL)
6450.6-07
1 SW/VIX189
2
01
1.5 GE
3
1
GROUND
DISTRIBUTION
0670.4
6450.6-04
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 VERSIONS



COMPRESSOR CONTROL AND WATER SUPPLY
INTEGRATED HEATING– AND CLIMATE CONTROL











F165A
30
87
F397.5A
18 X10018
FUSE DETAILS
0670.3
.75 SW
2
1
2
.5 SW/BL
5 X51
Y2
AIR CONDITIONING
COMPRESSOR
1) NORMAL
TEMPERATURE
2) HIGH
TEMPERATUREK19
COMPRESSOR
CONTROL RELAY FUSE DETAILS
0670.3
6
4 X51
12 X10016
X10241
86
85
15

4 X20
74 X6000
A6000
ENGINE CONTROL
MODULE (DME) .5 SW/BL
1
P90
FRONT POWER
DISTRIBUTION BOX

M VERSIONS