1999 BMW 318ti Electrical Troubleshooting Manual




 
Pin Assignments


 

E = Input, A = Output, M = Ground
X16
Pin Type Description/Function Connection
1
EHigh beam indicator controlCombination switch
2ETerminal 58g, instrument illumination powerDimmer
3ERight turn signal indicator controlHazard flasher relay
4ELeft turn signal indicator controlHazard flasher relay
5EWarning lamp for EGS fault (information
signal transmission oil temperature)Transmission control module (EGS)
6Not used
7Not used
8Not used
9Not used
10Not used
11Not used
12E/ATxD diagnostic data linkData link connector
13Not used
14EAirbag warning lamp (SRS) controlSupplemental restraint system control
module
15Not used
16E“Check engine” indicator controlEngine control module (DME)
17EPark brake warning lamp controlPark brake switch
18EBrake fluid warning lamp controlBrake fluid level switch
19EBrake pad wear warning lamp controlBrake pad sensors
20ECrankshaft RPM speed signal TDEngine control module (DME)
21Not used
22EVoltage supply, terminal 30Front power distribution box, fuse 31
23EVoltage supply, terminal 15 for indicator and
warning lampsFront power distribution box, fuse 27
24MGround supply, terminal 31 for instrument
cluster electronicsGround point
25Not used
26Not used





Pin Assignments


 

E = Input, A = Output, M = Ground
X17
Pin Type Description/Function Connection
1
ETrailer turn signal indicator controlHazard flasher relay
2AVehicle speed signalVarious control modules
3MGround supply, terminal 31 for indicator and
warning lampsGround point
4EVoltage supply, terminal 15 for instrument
cluster electronicsFront power distribution box, fuse 23
5EVoltage supply, terminal 15 for battery
charge indicatorIgnition switch, terminal 15
6EGround supply, terminal 61 for battery
charge indicatorGenerator
7Not used
8EFog light indicator controlFront power distribution box, fuse 15
9ASound tone signalChime module
10Not used
11Not used
12EASC signalASC control module
13ATI-measurement signal (fuel consumption)Engine control module (DME)
14ESeat belt warning lamp controlDriver’s seat belt switch
15ESIA reset/service interval indicator resetData link connector
16EVoltage supply, terminal RFront power distibution box, fuse 46
17ACoolant temperature sensor (–)Coolant temperature sensor
18ECoolant temperature sensor (+)Coolant temperature sensor
19EOil pressure warning lamp controlOil pressure switch
20Not used
21EABS warning lamp (ABS)ABS control module/hydraulic unit/slip
control module (ABS/ASC)
22EIgnition key warning/audible ignition key
warningIgnition switch
23EDriver’s door openDriver’s door jamb switch
24Not used





Pin Assignments


 

E = Input, A = Output, M = GroundPin ConnectionDescription/Function Type
25
Not used
26Not used
X271
Pin Type Description/Function Connection
1
AFuel level sensorFuel tank sensors
2Not used
3AGround supply for fuel tank sensors and
vehicle speed sensorFuel tank sensors and vehicle speed
sensor
4EPosition signal TWVehicle speed sensor
5Not used
6Not used
7Not used
8Not used
9Not used
10Not used
11Not used
12Not used





INSTRUMENT CLUSTER
INDICATORS
2
5
X4231
S31
PARK BRAKE
SWITCH
1) BRAKE SET
2) BRAKE NOT
SET 2 1
17
.5 BR/GN
X1111
B18
BRAKE FLUID
LEVEL SWITCH
1) LOW LEVEL
2) NORMAL LEVEL P90
FRONT POWER
DISTRIBUTION BOX
310
X203
7 2.5 GN15
F275A

A2w
INSTRUMENT
CLUSTER
10) AIR BAG 23
6
.5 BL
18
.35 BR/VI
X1614
.5 BL/SW
A12
SUPPLEMENTAL
RESTRAINT
SYSTEM CONTROL
MODULE
31
POWER
DISTRIBUTION
0670.2
7 10
A52
SLIP CONTROL
MODULE
(ABS/ASC) 40
X1170
CHARGING
SYSTEM
1230.0
2.5 GN
.5 GN
X1112
X173
GROUND
DISTRIBUTION
0670.4
14 X10017
X16X17
X74
1
X209
2 1
FUSE DETAILS
0670.3
!

.5 GR/SW/GE
X1426
.5 BL/SW
 

21 X16
S58
DRIVER’S SEAT
BELT SWITCH 2X778
.5 BL/VI/GE
14
15X13
.5 BL/VI/GE
S2
IGNITION SWITCH
0) OFF
1) ACCESSORY
2) RUN
3) START
42
.5 BL/BR
12X17
X33

PARK
BRAKE

INSTRUMENT CLUSTER
INDICATORS
GROUND
DISTRIBUTION
0670.4






3
GROUND
DISTRIBUTION
0670.4A2w
INSTRUMENT
CLUSTER
HEADLIGHTS/FOG
LIGHTS
6312.0TURN/HAZARD
LIGHTS
6313.0LIGHT SWITCH
DETAILS
6300.0
X178.35 WS1
.5 BL/GN
4
.5 BL/BR
X163
.5 WS/RT
X171
.5 GR/RT
X162
519 X16
.5 GR/BR
A8500
TRANSMISSION
CONTROL MODULE
(EGS)2 X713
X1322 .5 GE
X850025
2X118
1X118
1 X713
X13006
.5 GE
B16
LEFT FRONT
BRAKE PAD
SENSOR
.5 GE
B17
RIGHT REAR
BRAKE PAD
SENSOR
.5 GR/BR31
!
X173
14 X10017
23
F275AP90
FRONT POWER
DISTRIBUTION BOX
FUSE DETAILS
0670.3
X69
 

X17
25
10 X10016
F1515AP90
FRONT POWER
DISTRIBUTION BOX
NSW
FUSE DETAILS
0670.3

1 X6031
FUSE DETAILS
0670.3
P90
FRONT POWER
DISTRIBUTION BOX F27
5A
X1623
X1001714







INDICATORS
INSTRUMENT CLUSTER
A2w
INSTRUMENT
CLUSTER
3) ENGINE SPEED
INPUT
7) TACHOMETER
X62322B6232
ENGINE COOLANT
TEMPERATURE
SENSOR15
R
18X1620
.5 SW
GROUND
DISTRIBUTION
0670.4.5 BR/VI
3
SPEEDOMETER
X10010
31
1112
17
.5 BR/GE 24 X16
31
TEMPERATURE
GAUGE
X8015
A6000
ENGINE CONTROL
MODULE (DME) X6000
7
TD 12B6231
OIL PRESSURE
SWITCH
1) PRESSURE
BETWEEN
0.2–0.5 BAR
2) NORMAL
PRESSURE
19
1 X6232
23
.5 SW20 X20
.35 BR/GN
X6231
1
X1715
.35 WS/GN
19
X60027
 

.5 WS/GN
D100
DATA LINK
CONNECTOR.5 SW
.5 SW .5 SW
A837
ELECTRONIC
IMMOBILIZER
CONTROL MODULE
(EWS III)
5 X1805
.35 SW
X1047
16
.5 GR
.5 GR
A8
CRUISE CONTROL
MODULE
(TEMPOMAT) 8 X22
.35 SW
CHECK
ENGINE
WITHOUT EGS
.5 BR/GN .5 BR/VI .5 BR/GE
80 8 X20
A8500
TRANSMISSION
CONTROL MODULE
(EGS) 40 X8500
.5 SW
1 X6002
D100
DATA LINK
CONNECTORTD







SIGNAL–OUTPUT SPEEDOMETER
INSTRUMENT CLUSTER
.35 SW/WSR
A8
CRUISE CONTROL
MODULE
(TEMPOMAT)
A64
WIPER/WASHER
MODULE (LOW II)
X285
5
X2210
.35 SW/WS
6211.0-04
RA51
WIPER/WASHER
MODULE
X285
5
R
TACH TACHTACH
X1812610
X188
X3223 .5 SW/WS
.5 SW/WS
.5 SW/WS
X102459
.35 SW/WSN9
RADIO A35y
BOARD
COMPUTER
(BC – LOW)
TACH
WIPER/WASHER
(HIGH) WIPER/WASHER
(LOW)
.35 SW/WS
 







INDICATORS
INSTRUMENT CLUSTER
.5 SW/WS
F235A
P90
FRONT POWER
DISTRIBUTION BOX F46
15A
F315A

A2w
INSTRUMENT
CLUSTER
1) FUEL
CONSUMPTION
2) VEHICLE
SPEED
OUTPUT
11) FUEL GAUGE
14) SPEEDOMETER
31
31 4
16X1622
30
31
X173X2714
B10
VEHICLE SPEED
SENSOR
6211.0-03
X383
2
X3831
X172
31 312
14 1
FUSE DETAILS
0670.3FUSE DETAILS
0670.3
GROUND
DISTRIBUTION
0670.4OUTPUT–SIGNAL
SPEEDOMETER
X6792
X12412
13
B25y
FUEL TANK
SENSOR II
B6
FUEL LEVEL
SENSOR
X10018232X100176
X17
X6791 .5 BR/GE
.5 GE
.5 BR/SWX1241
1.5 BR/SW .5 BR/RT
.5 BR/SW
X805
X173
11
01/2
1/1FUSE DETAILS
0670.3
 

.5 BR/GE
X11291ON–BOARD
COMPUTER (BC IV)
6581.0.5 BR/GE
23
X1413
.5 BR/GR/GE
X443
N12w
ANTI–THEFT
CONTROL
MODULE (ALPINE)
X130254
A104
BODY
ELECTRONICS
CONTROL
MODULE (ZKE IV)X132542 12
X3522
GROUND
DISTRIBUTION
0670.4
X13006
X3521S14
DRIVER’S DOOR
JAMB SWITCH
1) DOOR OPEN
2) DOOR CLOSED
.5 BR/GR/GE
.5 BR/GR/GE .5 BR/GR/GE .5 BR/GR/GE