1999 BMW 318is Electrical Troubleshooting Manual








INTEGRATED CLIMATE REGULATION (IHKA E36)
A115
AUTOMATIC
CLIMATE CONTROL
MODULE 1 X85
Y4
WATER VALVE
ASSEMBLY
1) LEFT VALVE
2) RIGHT VALVE
X853
.5 GE/BR
3
.5 GE/BR
X100182
FUSE DETAILS
0670.3
13
P90
FRONT POWER
DISTRIBUTION BOX
2
.5 GE/VI
X10054
7
.5 GE/VI
18
1
4 X35
.5 GE
12 720
X152726
7X100542
.35 WS/VI 12
.35 SW/WS/GE
.35 BR/GE
5
.5 GR/RT
LIGHT SWITCH
DETAILS
6300.0
REAR WINDOW DE-
FOGGER/ANTENNA
6424.0
.5 BL/SW
.5 GR/RT
F315A
2
3131
8
11
PARK VENTILATION
WITH IHKA E36
6412.20DATA LINK
0670.5
.5 SW/WS/GE .5 GN .35 WS/VI
X35
TXD .35 GN/BR


TEMPERATURE CONTROL
INTEGRATED CLIMATE REGULATION (IHKA E36)






A115
AUTOMATIC
CLIMATE CONTROL
MODULE
X774X7721
X772
2
B11
LH HEAT EX-
CHANGER
TEMPERATURE
SENSOR
5V (15)5V (15)5V (15)5V (15)
3412
X7711
X771
2B14
EVAPORATOR
TEMPERATURE
SENSOR
B13
OUTSIDE
TEMPERATURE
SENSOR
X7731
X773
2B12
RH HEAT EX-
CHANGER
TEMPERATURE
SENSOR
X18161
22X774
.35 GE/RT .35 GE/BL .5 BL .35 GRX1527
.35 BR/OR
.35 BR/OR.35 BR/OR .35 BR/OR .35 BR/OR
X15276
X10054
11A115
AUTOMATIC
CLIMATE CONTROL
MODULE TD
X1047
.35 SW
.35 SW
.5 SW X1527


ENGINE CONTROL
SYSTEM (DME M5.2,
4–CYLINDER M44)
1210.20
A6000
ENGINE CONTROL
MODULE (DME) X6000
80 .5 SW.5 SWX20
20
X8015
5
3 .35 SW/WS
.35 SW/WS
X188
INSTRUMENT
CLUSTER
6211.0
.5 SW/WS
2 X17
TACH
2
31A2w
INSTRUMENT CLUSTER
2) VEHICLE SPEED
OUTPUTTD
1
2
36 318i
ENGINE CONTROL
SYSTEM MS41.1
(6–CYLINDER M52)
1210.17


AIR DELIVERY







INTEGRATED CLIMATE REGULATION (IHKA E36)
A115
AUTOMATIC
CLIMATE CONTROL
MODULE
.35 RT .35 BR .35 GE
M35
DEFROSTER FLAP
MOTORM44
REGULATION FLAP
MOTORM46
REAR
RECIRCULATION
FLAP MOTORM40
RECIRCULATION
FLAP MOTOR 3 2 1MI–Bus
SH–
SH–FT


COMPRESSOR CONTROLS
INTEGRATED CLIMATE REGULATION (IHKA E36)








15
31

30
87
P90
FRONT POWER
DISTRIBUTION BOX
18 X10018
FUSE DETAILS
0670.3
.75 SW/RT/GE
2
1
.5 SW/BL
5 X51
4
.5 SW/BL
.5 SW/BL
X8056
Y2
AIR CONDITIONING
COMPRESSOR
1) NORMAL
TEMPERATURE
2) HIGH
TEMPERATUREK19
COMPRESSOR
CONTROL RELAY
10 X1527
6
A6000
ENGINE CONTROL
MODULE (DME)
8 X10054

15A115
AUTOMATIC
CLIMATE CONTROL
MODULE
FUSE DETAILS
0670.3
6
31
4 X51
12 X1001631
.35 VI/GR
.5 VI/GR
.5 VI/GR
X163
X20
X600036
86
85
.5 SW/BL
69
15
AC
46 X8500
A8500
TRANSMISSION
CONTROL MODULE
(EGS)
7419 318i318i
F397.5AF165A
1
2
318i

AUXILIARY FAN – 6–CYLINDER ENGINE







INTEGRATED CLIMATE REGULATION (IHKA E36)
2.5 SW/BL
X82
1 B9
INTERMEDIATE
PRESSURE
SWITCH
1) ABOVE 18 BAR
PRESSURE
2) 15 BAR
PRESSURE
86 30P90
FRONT POWER
DISTRIBUTION BOX F16
5A
F4130A

K22
HIGH SPEED
RELAY
K21
NORMAL SPEED
RELAY
X872 .5 SW/GR
.35 SW/GN
X822 3
X873 1
S36
TEMPERATURE
SWITCH
1) OPEN
2) ABOVE 99
DEGREES C
3) ABOVE 91
DEGREES C
4) OPENM9
AUXILIARY FAN
MOTOR
8X536
4 X52
6
X10261386
87a 85
8530
87
X10261
2
.5 SW/BR
X165
85b X10016
12
4
85X522
X1001822
FUSE DETAILS
0670.3
.5 GN/VI
.5 GN/VI 2.5 GN/RT
X10027
.5 BR .5 BR
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
A115
AUTOMATIC
CLIMATE CONTROL
MODULE
.5 BL/SW
.35 BL/SW1
9 X10054
X152711 .5 SW/BRGROUND
DISTRIBUTION
0670.4
9
6450.7-05

15
B9508
PRESSURE
SWITCH
87 85b
.5 SW/GR2.5 BL
4
X1022
6450.7-05
.5 SW/BR
.5 SW/BR25
12
34
NOT USED
124 3
12
FUSE DETAILS
0670.3

.5 RT/WS
AUXILIARY FAN – 4–CYLINDER ENGINE







INTEGRATED CLIMATE REGULATION (IHKA E36)
.35 SW/GR
X1890
1 B9
INTERMEDIATE
PRESSURE
SWITCH
1) ABOVE 18 BAR
PRESSURE
2) 15 BAR
PRESSURE P90
FRONT POWER
DISTRIBUTION BOX
K22
HIGH SPEED
RELAYK21
NORMAL SPEED
RELAY
X113792 .5 SW/GR
4 SW/BL
X18902 3
X203
1
S36y
DOUBLE
TEMPERATURE
SWITCH
1) OPEN
2) ABOVE 88
DEGREES C
3) ABOVE 80
DEGREES C
4) OPEN M9
AUXILIARY FAN
MOTOR
8X536
6 X524
X102613X10261
2
X165
X1001612
42 X525
X15882
FUSE DETAILS
0670.3
4. GN/RT
X10027
GROUND
DISTRIBUTION
0670.4


X53
.5 SW/GR
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
A115
AUTOMATIC
CLIMATE CONTROL
MODULE
.5 BL/SW
.35 BL/SW1
9 X10054
X152711 .5 SW/BR
GROUND
DISTRIBUTION
0670.4
B9508
PRESSURE
SWITCH
.5 SW/GR4 BL
4
X1022
.5 SW/BR25
X165
GROUND
DISTRIBUTION
0670.4
P97
AUXILIARY FUSE
BOXP90
FRONT POWER
DISTRIBUTION BOX
X1001612
FUSE DETAILS
0670.3
X165
15
11
X208
X6000
A6000
ENGINE CONTROL
MODULE (DME)
X600068
.5 GR/VI
X113793
.35 SW/GN
F165A
12
34
12
30 86
87a 85
87
F4840AF165A
124 3
30 86
87 85
57
FUSE DETAILS
0670.3

CONVERTIBLECONVERTIBLE
12
X1260
12
23




6510.0 RADIO/STEREO
STEREO, 6–SPEAKER SYSTEM








N9
RADIO
H59
LEFT FRONT HIGH
RANGE SPEAKER 1
16
H58
LEFT FRONT LOW
RANGE SPEAKER
815 FUSE DETAILS
0670.3
11X876
X753
X826
X1381
P90
FRONT POWER
DISTRIBUTION BOX
H45
RIGHT REAR
SPEAKER 23
2
16
H50
RIGHT FRONT
HIGH RANGE
SPEAKERH51
RIGHT FRONT LOW
RANGE SPEAKER 11
2311 X827
X746
X877
X700
H46
LEFT REAR
SPEAKER 23
A2w
INSTRUMENT
CLUSTER
2) VEHICLE
SPEED
OUTPUT 2 X17
X188
3
10 X181263
1213
LIGHT SWITCH
DETAILS
6300.0
INSTRUMENT
CLUSTER
6211.0
614
18 X10015
1 GR/RT
9.5 GR/RT58g
.75 GE/BR
.75 GE/RT
.75 GE/RT
.5 GE/RT .75 GE/RT
X701
.75 GE/BR
.75 GE/BR
.5 GE/BRX18196
X1002
.75 GE/VI .75 GE/GR.75 BL/SW
.75 BL/SW
.5 BL/SW.75 BL/BR
.75 BL/BR
.5 BL/BRX18198
.75 BL/SW .75 BL/BR
X1380
.75 BL/VI .75 BL/GR .5 SW/WS
X322
.5 SW/WS
.5 SW/WS
2
1 X424.5 WS16
4 X18126
.5 WS/BR
N8
ANTENNA
AMPLIFIER AM/FM
F920AF4415A
1 5X322
31
X13016
4
1.5 RT/WS
FUSE DETAILS
0670.3 28 X10018
52
1.5 VI/WS
3X1892
6 X400
7 X14
.35 WS/BR.5 WS/BR .35 GE
MUTE 7
.35 GE
6
I-BUS
24 X14
TELEPHONE
CONNECTOR
LUGGAGE
COMPARTMENT
X557.35 WS/BR .35 WS/BR
.35 GE
N22
CD CHANGER
CELLULAR TELE-
PHONE (PROVI-
SIONS)
6561.0
GROUND
DISTRIBUTION
0670.4
X18723
X1001
X1261
CONVERTIBLE




6510.1 RADIO/HIFI/TOP HIFI






F3310AP90
FRONT POWER
DISTRIBUTION BOX F4415A

A2w
INSTRUMENT
CLUSTER
2) VEHICLE
SPEED
OUTPUT 2X17
X188
3
10CELLULAR
TELEPHONE
(PROVISIONS)
6561.0
INSTRUMENT
CLUSTER
6211.0
628 X10018
.5 SW/WS
X322
.5 SW/WS
.5 SW/WS
N9
RADIO 59
16
X830
15
GROUND
DISTRIBUTION
0670.42
2 X1892
1 X1892
161
.75 GE/RT1523
32
6 X18126
8 17
1211 14
14 X18126
2X606
FUSE DETAILS
0670.3
.5 WS
N9
RADIOA18
HIFI AMPLIFIER
.75 BL/RT .75 GE/SW .75 BL/SW
.75 BR/OR .75 BR/OR .75 BR/OR .75 BR/OR
LV–LH–RV–RH– N22
CD CHANGER
LV+ RV+ LH+ RH+
.5 WSANT
ANT
.5 WSX18126
31
F9 20A

18X10015
1
.5 WS/BR
4
1 X605
FUSE DETAILS
0670.3FUSE DETAILS
0670.3
41 X606
6X400
X14 .5 WS/BR
1.5 VI/WS
2
MUTE
1 X424N8
ANTENNA
AMPLIFIER AM/FM
GROUND
DISTRIBUTION
0670.4
3 X605
1.5 RT/WS
2.5 RT/WS
GROUND
DISTRIBUTION
0670.4
.35 GE
.35 GE
3X14
24
CONVERTIBLE30 I-BUS R
31 TACHO7
.35 GE .35 GE
4 X322
13
5
LIGHT SWITCH
DETAILS
6300.058g
58gTELEPHONE CONNECTOR

LUGGAGE COMPARTMENT

X557
.35 WS/BR
X322X19513
1.5 RT/WS
6 1 GR/RT
.5 GR/RT .35 WS/BR .35 WS/BR 7
X18723CONVERTIBLE
WITH TOP HIFIX18723CONVERTIBLE
WITH TOP HIFI
X13006X13016X13016