1999 BMW Z3M COUPE Electrical Troubleshooting Manual



Pin Assignments





E = Input, A = Output, M = GroundPin ConnectionDescription/Function Type
59
ECyl. 4-6 knock sensorKnock sensor
60EProgramming voltageData link connector
61MOxygen sensor heating groundOxygen sensor II (behind catalytic
converter)
62EActivate valveSecondary air pump value
63ECyl. 4-6 knock sensorKnock sensor
64ECamshaft positionCamshaft position sensor
65ECamshaft positionCamshaft position sensor
66Not used
67MOxygen sensor signal groundOxygen sensor I (in front of catalytic
converter)
68EActivate valveEvaporative emission valve
69EActivate relayFuel pump relay
70MOxygen sensor signal groundOxygen sensor II (in front of catalytic
converter)
71MOxygen sensor signal groundOxygen sensor I (behind catalytic
converter)
72MOxygen sensor signal groundOxygen sensor II (behind catalytic
converter)
73EActivate relayEngine control module relay
74AActivate A/C compressorCompressor control relay
75ESensor signalOxygen sensor I (in front of catalytic
converter)
76ESensor signalOxygen sensor II (in front of catalytic
converter)
77ESensor signalOxygen sensor I (behind catalytic
converter)
78ESensor signalOxygen sensor II (behind catalytic
converter)
79MOxygen sensor heating groundOxygen sensor I (behind catalytic
converter)
80AASC signal ZASlip control module ABS/ASC
81AASC signal ZWVSlip control module ABS/ASC
82AASC signal MSRSlip control module ABS/ASC
83ESensor signalCrankshaft position/RPM sensor



Pin Assignments





E = Input, A = Output, M = GroundPin ConnectionDescription/Function Type
84
Not used
85Not used
86Not used
87EBattery voltage, terminal 87Engine control module relay
88E/ATxD diagnosis data linkData link connector



ENGINE CONTROL SYSTEM MS41.1 (6–CYLINDER S52)
X6300
POWER










46
.5 RT
4 RT/WS
.5 RT/WS.5 BR
4 RT4 RT
8 X6300
73 5426 X6000
X6506
X6821
2
K6300
ENGINE CONTROL
MODULE RELAYG6430
B+ JUMP START
JUNCTION POINT
A6000
ENGINE CONTROL
MODULE (DME)86
8530
87
.5 RT/WS.5 RT/WS
M6506
E–BOX FAN POWER
DISTRIBUTION
0670.22
1210.17-041.5 RT/WS 1 RT/WS
.5 RT/WS
1210.17-01 1210.17-01
4 RTX6412
.5 RT/WS
87
2.5 RT14 X6002
D100
DATA LINK
CONNECTOR
X6411
31
6 RTX6430
1210.17-05
M VERSIONS
2.5 RT/WS
1210.17-06
LATE PRODUCTION



ENGINE CONTROL SYSTEM MS41.1 (6–CYLINDER S52)
Y6275
VARIABLE CAM-
SHAFT CONTROL
VALVE 1
.5 RT/WS
2
X6275
1 X6275









A6000
ENGINE CONTROL
MODULE (DME) .5 GN/BL
Y6106
CYL. 6 FUEL
INJECTION VALVE
–+
–+Y6101
CYL. 1 FUEL
INJECTION
VA LV E –+
Y6102
CYL. 2 FUEL
INJECTION VALVE
–+
Y6103
CYL. 3 FUEL
INJECTION VALVE
–+
Y6104
CYL. 4 FUEL
INJECTION
VA LV E –+
Y6105
CYL. 5 FUEL
INJECTION VALVE
–+
2712165222423 X6000
.5 RT/WS
1 X6101
1 X6103
.5 RT/WS
1
X6105
1 X6106
.5 RT/WS
1 X6104.5 RT/WS
1 X6102
1 RT/WS
2 X6130
2 X61022 X61042 X6106
2
X61052 X6103
2X6101
.75 BR/WS .75 BR/RT .75 BR/GE .75 BR/BL .75 BR/GN .75 BR/VI X6130
Y6130
IDLE SPEED
CONTROL VALVEX6820
.5 RT/WS
1210.17-00
1.5 RT/WS1210.17-00
33 .5 WS/
GN
3
.5 WS/
GE
53
.5 RT/WS
3131313131313131
M VERSIONS

.5 GN
1


ENGINE CONTROL SYSTEM MS41.1 (6–CYLINDER S52)
2.5 GN









7 X33
POWER
DISTRIBUTION
0670.2
21 X20
49 X6000
2.5 GNS2
IGNITION SWITCH
0) OFF
1) ACCESSORY
2) RUN
3) START
.75 GN
.5 GN
43 .5 BR/GR
.5 BR/RT
B6256
DUAL
TEMPERATURE
SENSOR
(COOLANT
TEMPERATURE)1 2 X6205
.5 BR/GR
B6205
INTAKE AIR
TEMPERATURE
SENSOR .5 GR
14 3910 X6000
A6000
ENGINE CONTROL
MODULE (DME) X203
2.5 GN
1 X209
X6832
X8038
2
X6256
X8071X8051
A2w
INSTRUMENT
CLUSTER
1112 X20
17 18 X17
.5 BR/GE .5 BR/VI
.5 BR/GE .5 BR/VI
.5 BR/GE .5 BR/VI
.5 BR/GR
B6236
ENGINE COOLANT
TEMPERATURE
SENSORB6232
ENGINE COOLANT
TEMPERATURE
SENSOR
2
10
3
R
1 X6150
2
4 X6326
K6326
UNLOADER RELAY,
TERMINAL 15
2.5 GN
8 X6326
30
87

X6830
62.5 RT
85 86
2.5 GN
2.5 GNGROUND
DISTRIBUTION
0670.4
2.5 RTX6413
X6415POWER
DISTRIBUTION
0670.210 RT
X6432
POWER
DISTRIBUTION
0670.2
G6430
B+ JUMP START
JUNCTION POINT
10 RT
M VERSIONS

1.5 SW/WS
29 X6454
GROUND
DISTRIBUTION
0670.42









1 3 X6151
X64561 SW/WS
X61521
1 GN1 GN1 GN
3
3 X6152
1 30 2 31 3 X6000
X6831
T6151
CYL. 1 IGNITION
COIL
T6152
CYL. 2 IGNITION
COIL
W6165
SHIELD UP TO
10mm BEFORE
IGNITION COIL
CONNECTOR
A6000
ENGINE CONTROL
MODULE (DME) 1.5 SW/RT 1.5 SW/GE 1.5 SW/BL 1.5 SW/GN 1.5 SW/VI1 SW/RT 1 SW/GE 1 SW/BL 1 SW/GN 1 SW/VI1 GN 1 GN 1 GN
X6151
2
2
X6153
X61532 1
X61541 3 X61542T6154
CYL. 4 IGNITION
COIL
3 X6155
X61552 1
X61561 3 X6156
T6156
CYL. 6 IGNITION
COIL
T6153
CYL. 3 IGNITION
COILT6155
CYL. 5 IGNITION
COIL
1 BR 1 BR 1 BR 1 BR 1 BR 1 BR
GROUND
DISTRIBUTION
0670.4
2.5 GN
4 9 7 6 3 10 X6150
313131313131
1.5 BR
R8554
RESISTOR
X6456
GROUND
DISTRIBUTION
0670.4
1.5 BR
R8554
RESISTOR
X6456
GROUND
DISTRIBUTION
0670.4
1.5 BR
R8554
RESISTOR240
2w240
2w240
2w



ENGINE CONTROL SYSTEM MS41.1 (6–CYLINDER S52)








2.5 RT/WS
X65001
GROUND
DISTRIBUTION
0670.4
4 X6500
2 6 8 X6301
69X6301
4
2.5 GN/VI.5 BR/GN
M2
FUEL PUMP
A6000
ENGINE CONTROL
MODULE (DME)
K6301w
FUEL PUMP RELAY 

 
X6000
X13032
79
X6822
7177
1210.17-05
72 61 78
124 3
X62102
X62102
B62102
OXYGEN SENSOR
I (BEHIND
CATALYTIC
CONVERTER)
2 14 3
X62202
X62202
B62202
OXYGEN SENSOR
II (BEHIND
CATALYTIC
CONVERTER) .5 RT/WS
.5 SW .5 GE .5 SW.5 GE .5 BR
1210.17-00
13
16
X100166
P90
FRONT POWER
DISTRIBUTION BOX
5 X10016
FUSE DETAILS
0670.3FUSE DETAILS
0670.3
F135AF1815A
14 X20
1 RT/WS
.5 RT/WS
.5 RT/WS
X20
.5 GN/VI(PARTIAL)
.5 BR
25677570 55 76
124 3
X62101
X62101
B62101
OXYGEN SENSOR
I (IN FRONT OF
CATALYTIC
CONVERTER)
2 14 3
X62201
X62201
B62201
OXYGEN SENSOR
II (IN FRONT OF
CATALYTIC
CONVERTER) .5 RT/WS
.5 SW .5 GE .5 SW.5 GE .5 BR
.5 BR
.5 RT/WS
M VERSIONS



ENGINE CONTROL SYSTEM MS41.1 (6–CYLINDER S52)
POWER
DISTRIBUTION
0670.2
G6430
B+ JUMP START
JUNCTION POINT
2.5 BR









1
4
X62072
32 3442 12 X6000
44 87
1 2 3 X6252
.5 SW.5 GE
1.5 BR.5 BR.5 SW.5 RT/GN
B6207
HOT FILM AIR
MASS METER
A6000
ENGINE CONTROL
MODULE (DME)
R6252
THROTTLE
POSITION SENSOR GROUND
DISTRIBUTION
0670.4
X6454
5V (15)
4
1.5 BR28
GROUND
DISTRIBUTION
0670.4GROUND
DISTRIBUTION
0670.4
X61202
68
1210.17-00
X6120
1
Y6120
EVAPORATIVE
EMISSION VALVE
.5 RT/WS
.5 BR
+–
3X6207
.5 RT/WS
X61631
62
X61632
Y6163
SECONDARY AIR
PUMP VALVE .5 RT/WS
.5 BR/WS
1210.17-04
X65502
50
X65501
Y6550
SOLENOID VALVE
(”RUNNING
LOSSES”) .5 RT/WS
.5 GE/BL
8 2 X6304
K6304
SECONDARY AIR
PUMP RELAY
30
35X6000.5 BR/GN
X61331X6133
2
Y6133
AIR PUMP
X6455
GROUND
DISTRIBUTION
0670.4
X63045
GROUND
DISTRIBUTION
0670.4
31313131
31
1210.17-09
.5 GR/WS.5 RT/WS X6822
(PARTIAL)
46
4 RT/GE
X8000
.5 RT/GN
56
GROUND
DISTRIBUTION
0670.4
31
X6456
POWER
DISTRIBUTION
0670.2
+
–
M VERSIONS