Page 102 of 382
ENGINE CONTROL SYSTEM MS42.1 (6–CYLINDER M52)
X6300
POWER
2 6
1.5 RT
1.5 RT/WS
4 RT/WS
4 RT
X6300
237 X6000126 X8500
4
K6300
ENGINE CONTROL
MODULE RELAYG6400
B+ JUNCTION
POINT E–BOX
A6000
ENGINE CONTROL
MODULE (DME) 85 30
87
A8500
TRANSMISSION
CONTROL MODULE
(EGS)
1 RTX64101
21X641022
POWER
DISTRIBUTION
0670.2
F20230AF20430A5
X8680F20320A
P98
FUSE HOLDER IN
E–BOX
15
8
4 RT/WS
6
4 RT/WS/GE
X86804
89 X60001
1515
1 RT/WS/GE 1.5 RT/WS/GE 2.5 RT/WS/GE
X6960
FUSE DETAILS
0670.3
X60002
.5 BR/WS
Z3 VERSIONS
Page 110 of 382
32X17461716
ENGINE CONTROL SYSTEM MS42.1 (6–CYLINDER M52)
6
11191 .5 BL
A8500
TRANSMISSION
CONTROL MODULE
(EGS)
A6000
ENGINE CONTROL
MODULE (DME) X60004
22 21 X1170
A52
SLIP CONTROL
MODULE
(ABS/ASC)
.5 BR/GN
6
X8500
88X60002
4
86 .35 GE3
85
.35 SW .5 WS/VI
X1893
.35 WS/GN
G6509
GENERATOR
13
X6524
2 .5 BL
26
X6231
1X60003
.5 BR/GN
B6231
OIL PRESSURE
SWITCH
1) PRESSURE
BETWEEN
0.2–0.5 BAR
2) NORMAL
PRESSURE11
.5 GE 10.5 BR
3637
A2w
INSTRUMENT
CLUSTER
14
FUSE DETAILS
0670.3
F275A
X10017
P90
FRONT POWER
DISTRIBUTION BOX
23
X1894
32 X60004
.5 WS/VI
X600217
D100
DATA LINK
CONNECTOR X17
.5 GE
X213
.5 BL
CAN + CAN –
CAN + CAN –TXD2 TXD2
D+
CAN + CAN –TXD2
CHARGING
SYSTEM
1230.0.5 BR
12
CAN –CAN +
Z3 VERSIONS
67.5 GE
CAN + CAN – .5 BR
A65
DYNAMIC STABIL-
ITY CONTROL UNIT
(DSC)43
X1658
CAN + CAN –
R33
STEERING ANGLE
SENSOR
.5 GE .5 BRWITH DSC
X16
Page 117 of 382
5 X209S2
IGNITION SWITCH
0) OFF
1) ACCESSORY
2) RUN
3) START
X209
4
START
.5 BR/SW16
5 X511
P90
FRONT POWER
DISTRIBUTION BOX
4 RT
L2S3
AUTOMATIC
TRANSMISSION
RANGE SWITCH
0) OFF (LOW)
1) ON (HIGH)
X511
7
2.5 SW/GE
8 X33
FUSE DETAILS
0670.3
ELECTRONIC
TRANSMISSION
CONTROL (EGS
A4S 270R)
2460.2
7
1
GROUND
DISTRIBUTION
0670.4
2.5 GN/SW
FUSE DETAILS
0670.32
82
A837
ELECTRONIC
IMMOBILIZER
CONTROL MODULE
(EWS III)
X1805
X10018
2.5 SW/GE
F315A
1 0
F285A
210
3
X1001830
3 X18994
S235
STARTER
IMMOBILIZATION
SWITCH
1) NORMAL
2) CLUTCH PEDAL
FULLY
DEPRESSED 2FUSE DETAILS
0670.3
12
F457.5A
1X18994
GROUND
DISTRIBUTION
0670.4 X1805
.35 BR/SW
3
X191
WITH EGS WITHOUT EGS
.5 BR/SW
F10650A
Z3 VERSIONS
G7512
B+ JUNCTION
POINT
X1981
X191
1 X33
POWER
DISTRIBUTION
0670.2X10017
.5 BR/SW
Page 120 of 382
10/992460.22000
S30
BRAKE LIGHT
SWITCH
8
S3
AUTOMATIC
TRANSMISSION
RANGE SWITCH
S8503
PROGRAM
SWITCHA8500
TRANSMISSION
CONTROL
MODULE (EGS)
L1 L2 L3 L4
54
P98
FUSE HOLDER IN
E–BOX 2460.2-00
F285A
26
2460.2-03
36379
TXD
X850088
2460.2-08
F2610AP90
FRONT POWER
DISTRIBUTION
BOX 2460.2-03
204513 2718
S8507
KICK–DOWN
SWITCH 2460.2-023428
L1L2 L3 L4
1 P011
1 R000
1 N110
0 D001
0 3101
1 2101
0 1100
F4615AP90
FRONT POWER
DISTRIBUTION
BOX 2460.0-04
10
Y8521
TRANSMISSION
VALVE UNIT
522 2460.2-01
AM2460.2-02
X8500
X8500
EG
S
Y19
SHIFT–LOCK 2460.2-02
252
A4S 270R
G6400
B+ JUNCTION
POINT E–BOX2460.2-03
2460.2-02
5330334322114
N
S
42 15
A6000
ENGINE CONTROL
MODULE (DME) 2460.2-00
8586
F20430A
POWER
DISTRIBUTION
0670.2
2460.2 ELECTRONIC TRANSMISSION CONTROL (EGS A4S 270R)
Page 121 of 382

Pin Assignments
E = Input, A = Output, M = Ground
X8500
Pin Type Description/Function Connection
10
Not used
11MGroundShift-lock
12Not used
13ASolenoid valve 3 control (–)Transmission valve unit
14AHydraulic pressure regulator control (–)Transmission valve unit
15Not used
16Not used
17EGear range signal L2Automatic transmission range switch
18EGear range signal L4Automatic transmission range switch
19EBrake pedal positionBrake light switch
20Not used
21Not used
22EManual mode signalProgram switch
23EOutput speed (–)Transmission valve unit
24MGround for shieldShield for speed sensor
25Not used
26Not used
27EKick-down signalKick-down switch
28Not used
29EAutomatic mode signalProgram switch
30EOil temperature signal (–)Transmission valve unit
31EOil temperature signal (+)Transmission valve unit
32Not used
33Not used
34Not used
35EBattery voltageB+ junction point E-box
36AM-program indicationProgram switch
37MGroundGround point
38Not used
39ASolenoid valve 1 control (–)Transmission valve unit
Page 122 of 382
Pin Assignments
E = Input, A = Output, M = GroundPin ConnectionDescription/Function Type
40
Not used
41ATorque converter clutch solenoid valve
control (–)Transmission valve unit
42ASolenoid valve 2 control (–)Transmission valve unit
43MGroundGround point
44Not used
45EGear range signal L1Automatic transmission range switch
46EGear range signal L3Automatic transmission range switch
47Not used
48Not used
49Not used
50Not used
51EOutput speed (+)Transmission valve unit
52Not used
53Not used
54AA-program indicationProgram switch
55Not used
56Not used
57Not used
58Not used
59Not used
60Not used
61AShift-lock solenoid controlShift-lock
62AVoltage solenoid valvesTransmission valve unit
63EVoltage supplyFuse 204
64Not used
65Not used
66Not used
67Not used
68Not used
69Not used
70Not used
Page 124 of 382
ELECTRONIC TRANSMISSION CONTROL (EGS A4S 270R)
425V (15)
.5 GE22
.5 TR53A8500
TRANSMISSION
CONTROL MODULE
(EGS)
1.5 RT/WS
54
X8500
31
W8505
SHIELD UP TO
10mm BEFORE
ELECTRONIC
TRANSMISSION
OUTPUT SHAFT
SPEED SENSOR
(EGS).75 RT
3
85
X600024
86
.35 SW .35 GEA6000
ENGINE CONTROL
MODULE (DME)
X8500
CAN - CAN +
CAN - CAN +X86808
FUSE DETAILS
0670.3
F20430AP98
FUSE HOLDER IN
E–BOX
Page 125 of 382
A8500
TRANSMISSION
CONTROL MODULE
(EGS)
9
327
.5 BL
4 3
.5 VI
332
.5 GN
301
.5 OR
5 6
.5 GR
21 .5 SW
2
14 .5 SW
X8500
8
14
1
.5 RT .5 GE .75 RT
31313131313131
W8505
SHIELD UP TO
10mm BEFORE
ELECTRONIC
TRANSMISSION
OUTPUT SHAFT
SPEED SENSOR
(EGS)
31 15
X8516
X8516
Y8521
TRANSMISSION
VALVE UNIT
1) SOLENOID
VALVE 1
2) SOLENOID
VALVE 2
3) SOLENOID
VALVE 3
6) HYDRAULIC
PRESSURE
REGULATOR
7) TORQUE
CONVERTER
CLUTCH
SOLENOID
VA LV E
8) OIL
TEMPERATURE
SENSOR
9) SPEED
SENSOR DR .5 TR
.75 BR
X8073
2X85054
1 12 9 11 X8505
6 16