BMW 318is 1998 E36 Electrical Troubleshooting Manual




INDEX









SEAT CUSHION TILT MOTOR, DRIVER’S, M50 5200.0-00. . . . . . .
SEAT CUSHION TILT MOTOR, PASSENGER’S, M61 5200.0-01. .
SEAT HEATER SWITCH, DRIVER’S SEAT, S53 5203.0-00. . . . . . .
SEAT HEATER SWITCH, PASSENGER’S SEAT, S54 5203.0-00. .
SEAT HEATER, DRIVER’S, E57 5203.0-00. . . . . . . . . . . . . . . . . . . . .
SEAT HEATER, PASSENGER’S, E58 5203.0-00. . . . . . . . . . . . . . . .
SEAT HEIGHT MOTOR, DRIVER’S, M52 5200.0-00. . . . . . . . . . . . .
SEAT HEIGHT MOTOR, PASSENGER’S, M59 5200.0-01. . . . . . . .
SEAT LUMBAR SUPPORT MOTOR/VALVE, DRIVER’S,
M55z 5200.0-02. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SEAT LUMBAR SWITCH, DRIVER’S, S52 5200.0-02. . . . . . . . . . . .
SEAT MAT, I1008 3234.0-03. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SEAT MOVEMENT MOTOR, DRIVER’S, M51 5200.0-00. . . . . . . . .
SEAT MOVEMENT MOTOR, PASSENGER’S, M60 5200.0-01. . . .
SEAT OCCUPANCY DETECTOR, A113 3234.0-00. . . . . . . . . . . . . .
SEATBACK HEATER, DRIVER’S, E56 5203.0-00. . . . . . . . . . . . . . . .
SEATBACK HEATER, PASSENGER’S, E59 5203.0-00. . . . . . . . . . .
SEATBACK RECLINER MOTOR, DRIVER’S, M53 5200.0-00. . . . .
SEATBACK RECLINER MOTOR, PASSENGER’S, M58 5200.0-01
SECONDARY AIR PUMP RELAY, K6304 1210.17-05. . . . . . . . . . . .
SECONDARY AIR PUMP RELAY, Y6304 1210.20-09. . . . . . . . . . . .
SECONDARY AIR PUMP VALVE, Y6163 1210.17-05. . . . . . . . . . . .
SECONDARY AIR PUMP VALVE, Y6163 1210.20-09. . . . . . . . . . . .
SHIFT–LOCK, Y19 2460.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SIDE AIR BAG GAS GENERATOR, LEFT, G14 3234.0-01. . . . . . . .
SIDE IMPACT SENSOR, DRIVER’S, B78 3234.0-01. . . . . . . . . . . . .
SIDE IMPACT SENSOR, PASSENGER’S, B79 3234.0-01. . . . . . . .
SLIP CONTROL (ABS) 3450.0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SLIP CONTROL (ABS/ASC) 3450.1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
SLIP CONTROL MODULE (ABS/ASC), A52 3450.1. . . . . . . . . . . . . .
SOLENOID VALVE (”RUNNING LOSSES”), Y6550 1210.17-05. . . .
SPATIAL SOUND RELAY, K128 6424.0-02. . . . . . . . . . . . . . . . . . . . . .
SPATIAL SOUND SWITCH, S303 6510.1. . . . . . . . . . . . . . . . . . . . . . .
SPEAKER, LEFT REAR, H46 6510.0-00. . . . . . . . . . . . . . . . . . . . . . .
SPEAKER, LEFT REAR, H46 6510.1-01. . . . . . . . . . . . . . . . . . . . . . .
SPEAKER, RIGHT REAR, H45 6510.0-00. . . . . . . . . . . . . . . . . . . . . .
SPEAKER, RIGHT REAR, H45 6510.1-02. . . . . . . . . . . . . . . . . . . . . .
SPEED SENSOR – ABS, LEFT FRONT, B2 3450.0-01. . . . . . . . . . .
SPEED SENSOR – ABS, LEFT FRONT, B2 3450.1. . . . . . . . . . . . . .
SPEED SENSOR – ABS, LEFT REAR, B4 3450.0-01. . . . . . . . . . . .
SPEED SENSOR – ABS, LEFT REAR, B4 3450.1. . . . . . . . . . . . . . .
SPEED SENSOR – ABS, RIGHT FRONT, B1 3450.0-01. . . . . . . . . .
SPEED SENSOR – ABS, RIGHT FRONT, B1 3450.1. . . . . . . . . . . . .
SPEED SENSOR – ABS, RIGHT REAR, B3 3450.0-01. . . . . . . . . . .
SPEED SENSOR – ABS, RIGHT REAR, B3 3450.1. . . . . . . . . . . . . .
SPLICE LOCATION VIEWS 8000.0. . . . . . . . . . . . . . . . . . . . . . . . . . . .
START 1240.0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STARTER IMMOBILIZATION SWITCH, S235 6135.0-00. . . . . . . . . .
STARTER, M6510 1240.0-02. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SUPPLEMENTAL RESTRAINT SYSTEM (AIR BAG) 3234.0. . . . . .
SUPPLEMENTAL RESTRAINT SYSTEM CONTROL MODULE,
A12 3234.0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SUPPRESSION FILTER, C900 6424.0. . . . . . . . . . . . . . . . . . . . . . . . .
SYMBOLS 0140.0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TAIL LIGHT, LEFT, H25 6314.0-01. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TAIL LIGHT, LEFT, H37 6314.0-01. . . . . . . . . . . . . . . . . . . . . . . . . . . . .




INDEX







\b
TAIL LIGHT, RIGHT, H30 6314.0-01. . . . . . . . . . . . . . . . . . . . . . . . . . . .
TAIL LIGHT, RIGHT, H39 6314.0-01 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TELEPHONE CONNECTOR 6561.0 . . . . . . . . . . . . . . . . . . . . . . . . . . .
TEMPERATURE SWITCH, S36 6450.7-05 . . . . . . . . . . . . . . . . . . . . . .
THERMOSTAT, A32y 6410.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THROTTLE POSITION SENSOR, R6252 1210. . . . . . . . . . . . . . . . . .
TI LT/SLIDE SUNROOF CONTROL ASSEMB LY , A56 5410.1-00
. . .
TI LT/SLIDE SUNROOF SWITCH (SHD), S38 5410.1-00
. . . . . . . . . .
TRANSMISSION CONTROL MODULE (EGS), A7000 2460.4-00 . .
TRANSMISSION CONTROL MODULE (EGS), A8500 2460.2-00 . .
TRANSMISSION POSITION INDICATOR LIGHT, E82 6300.0-01 . .
TRANSMISSION VALVE UNIT, Y8505 2460.2-01 . . . . . . . . . . . . . . . .
TRANSMISSION VALVE UNIT, Y8505y 2460.2-07 . . . . . . . . . . . . . . .
TRANSMISSION VALVE UNIT, Y8505y 2460.4-01 . . . . . . . . . . . . . . .
TRANSMITTER MODULE (EWS II), A835 6135.0 . . . . . . . . . . . . . . . .
TURN LIGHT, LEFT FRONT, H7 6313.0-02 . . . . . . . . . . . . . . . . . . . . .
TURN LIGHT, LEFT REAR, H6 6313.0-02 . . . . . . . . . . . . . . . . . . . . . .
TURN LIGHT, RIGHT FRONT, H4 6313.0-02 . . . . . . . . . . . . . . . . . . . .
TURN LIGHT, RIGHT REAR, H5 6313.0-02 . . . . . . . . . . . . . . . . . . . . .
TURN/HAZARD LIGHTS 6313.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UNCOUPLING DIODE, V6 6412.20-00 . . . . . . . . . . . . . . . . . . . . . . . . .
UNLOADER RELAY, TERMINAL 15, K6326 1210. . . . . . . . . . . . . . . .
UNLOADER RELAY, TERMINAL 15, K9 5203.0-00 . . . . . . . . . . . . . .
VARIABLE CAMSHAFT CONTROL VALVE 1, Y6275 1210.17-05 . .
VEHICLE SPEED SENSOR, B10 6211.0-04 . . . . . . . . . . . . . . . . . . . .
WASHER FLUID LEVEL SWITCH, S64 6581.2-02 . . . . . . . . . . . . . . .
WASHER JET HEATER, LEFT, E51 6169.0-00 . . . . . . . . . . . . . . . . . .
WASHER JET HEATER, RIGHT, E52 6169.0-00 . . . . . . . . . . . . . . . . . WASHER PUMP, M4 6160.1-01
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WATER VALVE ASSEMBLY, Y4 6410.5-00 . . . . . . . . . . . . . . . . . . . . . .
WATER VALVE ASSEMBLY, Y4 6450.7-01 . . . . . . . . . . . . . . . . . . . . . .
WINDOW BLOWER MICRO SWITCH, REAR, S196 5430.1-01 . . . .
WINDOW BLOWER RELAY, REAR,K99 6424.0-01 . . . . . . . . . . . . . .
WINDOW BLOWER, REAR, M105 6424.0-01 . . . . . . . . . . . . . . . . . . .
WINDOW DEFOGGER/ANTENNA, REAR, 6424.0 . . . . . . . . . . . . . . .
WINDOW MOTOR, DRIVER ’S, M21 5133.1-04 . . . . . . . . . . . . . . . . . .
WINDOW MOTOR, LEFT REAR, M20 5133.1-05 . . . . . . . . . . . . . . . .
WINDOW MOTOR, LEFT REAR, M98 5133.1-05 . . . . . . . . . . . . . . . .
WINDOW MOTOR, PASSENGER ’S, M23 5133.1-04 . . . . . . . . . . . . .
WINDOW MOTOR, RIGHT REAR, M22 5133.1-05 . . . . . . . . . . . . . . .
WINDOW MOTOR, RIGHT REAR, M99 5133.1-05 . . . . . . . . . . . . . . .
WINDSCREEN COWL PANEL LOCK MICRO SWITCH, S231 5430.1-00 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . .
WINDSCREEN COWL PANEL LOCK MOTOR, M132 5430.1-00 . . .
WINDSHIELD WASHER JET HEATERS 6169.0 . . . . . . . . . . . . . . . . .
WIPER MOTOR, M3 6160.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WIPER/WASHER MODULE (LOW II), A64 6160.1-00 . . . . . . . . . . . .
WIPER/WASHER MODULE (WWM) 6160.1 . . . . . . . . . . . . . . . . . . . . .
WIPER/WASHER MODULE, A51 6160.1-01 . . . . . . . . . . . . . . . . . . . .
WIPER/WASHER SWITCH, S5 6160.1 . . . . . . . . . . . . . . . . . . . . . . . . .
ZKE CENTRAL LOCKING (ZV) 5126.0 . . . . . . . . . . . . . . . . . . . . . . . . .
ZKE DOOR LOCK HEATING (TSH) 5120.0 . . . . . . . . . . . . . . . . . . . . .





"#'($
0110.0 INTRODUCTION $%%




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Schematics
The schematics divide the entire vehicle electrical system into individual circuits. Interacting
electrical components are shown on one common schematic.
Switches and other components are represented in such a way that their general layout and
function are self–explicit. They are arranged on the sheet such that the current path can be
followed from positive (top) to negative (bottom).
Important: The components and wires are not drawn to scale. For instance, a lead with a length
of over 1m can be shown as a lead that is only a few cm long. To ensure clear arrangement , all
connectors, lines branches and connected components from the fuses to the component and
from the component to ground connection are not shown within the individual cells. If required,
reference can be made to cells 0670.3 Fuse Details and 0670.4 Ground Distribution where all
lines are illustrated with all plug connections, line branches and connected components.
All circuit symbols used are listed and explained in cell 0140.0 Symbols.
In cell 7000.0 Component Location Chart all important connectors, ground points and
components are listed in tabular form. It provides a precise description of the component
locations in the vehicle.
In cell 7100.0 Component Location Views the location of connectors and components which
are difficult to locate are shown in line arts or illustrations. In cell 8000.0 Splice Location Views
all splices are listed in numerical order and illustrations are provided to assist in locating splices
on larger harnesses. In cell 8500.0 Connector Views diagrams of connectors with more than 2
pins are illustrated.
Included in this ETM are foldout block diagrams. These are overviews of the entire system (EGS,
ABS, AC, etc.) which helps understand the relationships between various components and
control unit of the system being diagnosed.

Example
General conventions can be explained based on the following schematic example.

 $%%INTRODUCTION








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General Conventions
1. Switches and relays are always shown in rest position (e.g. K11).
2. A component shown in a dashed frame signifies that the component is
illustrated only in part (e.g. P90 and P91).
3. A component shown in a completely drawn frame signifies that the
component is illustrated in full (e.g. K11).
4. The dashed line between pin 8 and pin 6 of connector X293 indicates
that both pins belong to connector X293.
5. The dashed line from fuse F1 to pin 8 of connector X293 shows the
positive supply of relay K11. If required, refer to cell 0670.3 Fuse Details at
fuse F1 for the complete line progressing with plug connections, line
branches, wire colors and cross sections.6. The dashed line with an arrow at splice X452 indicates that several wires
lead to splice X452. All lines leading to the connection are illustrated in
cell 6100.0 Central Body Electronics (ZKE). An interrupted line with an
arrow indicates that only this one wire leads to another circuit.
7. The dashed line from pin 4 of connector X293 to ground X493 shows the
ground supply for relay K11. If required, refer to cell 0670.4 Ground
Distribution at ground X493 for the complete line progression with all plug
connections, line branches, wire colors, and cross sections.
8. The interrupted line from splice X452 with an A in the open arrow is
continued on page 6160.0–02.
Termination of wire 4 VI/SW from splice X452 with a wavy line indicates that
the wire is continued on the opposite page.




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CIRCUIT BREAKERVARIABLE RESIS-
TANCE SENSOR
VARIABLE CON-
TACT IS MOVED BY
AN EXTERNAL
FORCE
VARIABLE RESIS-
TOR RESISTANCE
IS CHANGED BY
TEMPERATURE OR
PRESSURE
DIODE CURRENT
CAN FLOW ONLY IN
DIRECTION OF
ARROW
ZENER DIODE TO
REGULATE VOLT-
AGE
LIGHT EMITTING
DIODE PERMANENT MAG-
NET MOTOR ONE
SPEED
PERMANENT MAG-
NET MOTOR TWO
SPEEDS SOLENOID
SOLENOID CON-
TROLLED VALVE
OR CLUTCH
SOLENOIDTRANSISTORIZED
SWITCH HEATING ELEMENT
OXYGEN SENSORCONTROL/POWER
ELECTRONICS
RADIO LOUDSPEAKER OR
HORN
LIGHT BATTERY
FUSIBLE LINK
FUSE DETAILS
INDUCTIVE
SENSOR
KNOCK SENSOR
31


VEHICLE SPEED
SENSOR

THERMO SWITCH
HALL EFFECT
SENSOR
ANTENNA
0140.0 SYMBOLS




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A WAVY LINE
MEANS WIRE IS
CONTINUED
ENTIRE COM-
PONENT SHOWN
COMPONENT WITH
SCREW TERMI-
NALS
CONNECTOR
ATTACHED TO
COMPONENT
PART OF COM-
PONENT SHOWN
.75 BR.5 BR
X270
4
.5 BR
.5 BR
3
.5 BR.5 BR
X270
4
.5 BR
.75 GN/WS CONNECTOR
ATTACHED TO
COMPONENT LEAD
(PIGTAIL)
COMPONENT CASE
ATTACHED
DIRECTLY TO
METAL PART OF
CAR (GROUNDED)WIRE INSULATION
IS ONE COLOR
PIN NUMBER
WIRE INSULATION
IS ONE COLOR
WITH ANOTHER
COLOR STRIPE
(GREEN WITH
WHITE)
WIRE ATTACHED
TO METAL PART
OF CAR
(GROUNDED)
GROUND NUMBERED FOR
REFERENCE ON COM-
PONENT LOCATION CHART
WIRE SIZE IN MM
SQUARED
BL BLUEWIRE COLOR
BR BROWN
GE YELLOW
GN GREEN
GR GRAY
OR ORANGE
RS PINK
RT RED
SW BLACK
VI VIOLET
WS WHITE
ONE POLE, TWO
POSITION SWITCH
SWITCHES THAT
MOVE TOGETHER
DASHED LINE SHOWS A
MECHANICAL CONNECTION
BETWEEN SWITCHES
TR TRANSPARENT
CONNECTOR REF-
ERENCE NUMBER
FOR COMPONENT
LOCATION CHART
TWO CONNEC-
TIONS (PINS) IN
THE SAME
CONNECTOR
DASHED LINE INDI-
CATES TERMINALS
OF THE SAME
CONNECTOR
12
X165
1212
SYMBOLS




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4 RT
15
4 GN13
.5 GN/WS5
2.5 SW/GE 2.5 VI42
DETAILS ABOUT
COMPONENT OR
OPERATION
”R” IS ENERGIZED
IN ACCY, RUN, OR
START 76 82 X33CONTACT RELAYRELAY WITH
RESISTOR
ACROSS WINDINGTERMINAL NUMBER THREE POLE,
FOUR POSITION
SWITCHCOMPONENT NUMBER
S2
IGNITION SWITCH
0) OFF
1) ACCESSORY
2) RUN
3) START
TERMINAL NUMBER DESCRIPTION
50 VOLTAGE: IGNITION
SWITCH IN START
VOLTAGE: SUPPLIED
AT ALL TIMES
VOLTAGE: IGNITION
SWITCH IN RUN OR
START 30
15
15I
50 R30
INDICATES THAT
FUSE 9 IS SUPPLIED
WITH POWER AT ALL
TIMES
CONTACT RELAY
WITH TWO OUTPUTSCHANGEOVER
RELAY WITH TWO
OUTPUTS
TERMINAL NUMBER DESCRIPTION
30 RELAY INPUT
RELAY OUTPUT
(WINDING)
RELAY INPUT
(WINDING)
RELAY OUTPUT
(ENERGIZED)
RELAY OUTPUT
(AT REST) 85
86
87
87a
30 86
87 87 8530 86
87 85 87a
TERMINAL NUMBER DESCRIPTION
VOLTAGE: IGNITION
SWITCH IN RUN
VOLTAGE: IGNITION
SWITCH IN ACCES-
SORY, RUN OR START 15I
R
GROUND 31
POWER STATUS DESCRIPTION
VOLTAGE: SUP-
PLIED AT ALL TIMES
VOLTAGE: IGNITION
SWITCH IN RUN OR
START
VOLTAGE: IGNITION
SWITCH IN ACCES-
SORY, RUN OR START
30 86
87 8530
86
87 85NAME OF COMPONENT
F915A
2
10
32
10
32
10
3
SYMBOLS




SYMBOLS $%%




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1.5 BR DATA LINK
0670.5 .5 WS/GE
0670.0-030670.0-02
1.5 BRN9
RADIO
THE COMPLETE
WIRE PROGRES-
SION AND FUR-
THER CIRCUITS
CONNECTED TO
GROUND X497 ARE
SHOWN IN CELL
”0670.4 GROUND
DISTRIBUTION” AT
GROUND X497
THE COMPLETE
WIRE PROGRES-
SION AND FUR-
THER CIRCUITS
CONNECTED TO
FUSE 18 ARE
SHOWN IN CELL
”0670.3 FUSE
DETAILS” AT FUSE
18
CURRENT PATH IS
CONTINUED AS
LABELED P90
FRONT POWER
DISTRIBUTION BOX F18
15A
GROUND
DISTRIBUTION
0670.4
N1
ANTI–THEFT
CONTROL MODULE
(DWA) FUSE DETAILS
0670.3A1
GENERAL MODULE
X252
17X332
2
CIRCUIT REF-
ERENCE–A WIRE
WHICH CONNECTS
TO ANOTHER CIR-
CUIT
A2
INSTRUMENT
CLUSTER
X16
11RXD
ARROW SHOWS
DIRECTION OF
CURRENT FLOW
AND IS REPEATED
WHERE CURRENT
PATH CONTINUES
X497
X1812615
X491

23
K48
LOW BEAM LIGHT
RELAY 11 12 13456789
38
37
35
34
33
32
31 42
41
40
39 43 44

0670.0 POWER DISTRIBUTION CHART
FRONT POWER DISTRIBUTION BOX
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K2
HORN RELAYK47
FRONT FOG LIGHT
RELAYK16
HAZARD FLASHER
RELAYK4
BLOWER RELAY
K13
REAR DEFOGGER
RELAYK10
ABS RELAYK22
HIGH SPEED
RELAYK19
COMPRESSOR
CONTROL RELAYK21
NORMAL SPEED
RELAY K6300
ENGINE CONTROL
MODULE RELAYK6301w
FUEL PUMP RELAY
X56X44X45X64X58
X292X54
X53X51X52
X6300X630146
45
36110
14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
FUSES FUSES
X0
K6304
SECONDARY AIR
PUMP RELAYX6304
X11393K125
ABS PUMP MOTOR
RELAY, TIMED

POWER DISTRIBUTION CHART
RELAY PANEL UNDER LH SIDE OF DASHBOARD
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N17
CRASH CONTROL
MODULEF48K46
HIGH BEAM LIGHT
RELAYX1588X65X10262
F50X10273
K450
PARK VENTILATION
RELAYX607
K46z
DAY LIGHT RELAY
MODULE