1999 BMW Z3M COUPE Electrical Troubleshooting Manual

INDEX














SIDE IMPACT SENSOR, PASSENGER’S, B79 3234.0-03. . . . . . . . . . . . . .
SLIP CONTROL (ABS/ASC) 3450.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SLIP CONTROL MODULE (ABS/ASC), A52 3450.1. . . . . . . . . . . . . . . . . . . .
SOLENOID VALVE (”RUNNING LOSSES”), Y6550 1210.17-05. . . . . . . . . .
SOLENOID VALVE (”RUNNING LOSSES”), Y6550 1210.25-04. . . . . . . . . .
SPEAKER, LEFT REAR, H46 6510.1-03. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPEAKER, RIGHT REAR, H45 6510.1-03. . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPEED SENSOR – ABS, LEFT FRONT, B2 3450.1-04. . . . . . . . . . . . . . . . .
SPEED SENSOR – ABS, LEFT FRONT, B2 3450.1-07. . . . . . . . . . . . . . . . .
SPEED SENSOR – ABS, LEFT REAR, B4 3450.1-04. . . . . . . . . . . . . . . . . .
SPEED SENSOR – ABS, LEFT REAR, B4 3450.1-07. . . . . . . . . . . . . . . . . .
SPEED SENSOR – ABS, RIGHT FRONT, B1 3450.1-04. . . . . . . . . . . . . . . .
SPEED SENSOR – ABS, RIGHT FRONT, B1 3450.1-07. . . . . . . . . . . . . . . .
SPEED SENSOR – ABS, RIGHT REAR, B3 3450.1-04. . . . . . . . . . . . . . . . .
SPEED SENSOR – ABS, RIGHT REAR, B3 3450.1-07. . . . . . . . . . . . . . . . .
SPLICE LOCATION VIEWS 8000.0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
START 1240.0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STARTER IMMOBILIZATION SWITCH, S235 1240.0. . . . . . . . . . . . . . . . . . .
STARTER, M6510 1240.0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SUPPLEMENTAL RESTRAINT SYSTEM (AIR BAG) 3234.0. . . . . . . . . . . .
SUPPLEMENTAL RESTRAINT SYSTEM CONTROL MODULE,
A12 3234.0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SYMBOLS 0140.0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TAIL LIGHT, LEFT, H25 6314.0-01. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TAIL LIGHT, LEFT, H37 6314.0-01. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TAIL LIGHT, RIGHT, H30 6314.0-01. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TAIL LIGHT, RIGHT, H39 6314.0-01. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TEMPERATURE SWITCH, S36 6450.6-03. . . . . . . . . . . . . . . . . . . . . . . . . . . .
TEMPERATURE SWITCH, S36 6450.6-07. . . . . . . . . . . . . . . . . . . . . . . . . . . .
TEMPERATURE WHEEL SWITCH, S531 6450.6-01. . . . . . . . . . . . . . . . . . . TEMPERATURE WHEEL SWITCH, S531 6450.6-05. . . . . . . . . . . . . . . . . . .
THERMAL OIL LEVEL SENSOR (TOENS) CONTROL MODULE,
A19007 6211.0-06. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THERMAL OIL LEVEL SWITCH, B6254 6211.0-07. . . . . . . . . . . . . . . . . . . . .
THERMOSTAT, CHARACTERISTIC MAP COOLING, B6279 1210.25-05.
THROTTLE POSITION SENSOR, R6252 1210.17-05. . . . . . . . . . . . . . . . . .
THROTTLE POSITION SENSOR/
CRUISE CONTROL ACTUATOR, R6385 1210.25-07. . . . . . . . . . . . . . . . . .
THROTTLE POSITION SENSOR/CRUISE CONTROL
ACTUATOR, R6385 6571.0-03. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TILT SUNROOF MOTOR, M24y 5410.5-00. . . . . . . . . . . . . . . . . . . . . . . . . . .
TILT SUNROOF SWITCH, S38y 5410.5-00. . . . . . . . . . . . . . . . . . . . . . . . . . .
TIRE INFLATION SYSTEM 3614.0-00. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TRANSMISSION CONTROL MODULE (EGS), A8500 2460.2. . . . . . . . . . .
TRANSMISSION POSITION INDICATOR LIGHT, E82 6300.0-02. . . . . . . .
TRANSMISSION VALVE UNIT, Y8521 2460.2-01. . . . . . . . . . . . . . . . . . . . . .
TURN LIGHT, LEFT FRONT, H7 6313.0-02. . . . . . . . . . . . . . . . . . . . . . . . . . .
TURN LIGHT, LEFT REAR, H6 6313.0-03. . . . . . . . . . . . . . . . . . . . . . . . . . . .
TURN LIGHT, RIGHT FRONT, H4 6313.0-02. . . . . . . . . . . . . . . . . . . . . . . . . .
TURN LIGHT, RIGHT REAR, H5 6313.0-03. . . . . . . . . . . . . . . . . . . . . . . . . . .
TURN/HAZARD LIGHTS 6313.0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UNLOADER RELAY, TERMINAL 15, K6326 1210.17-02. . . . . . . . . . . . . . . .
UNLOADER RELAY, TERMINAL 15, K6326 1210.25-01. . . . . . . . . . . . . . . .
UNLOADER RELAY, TERMINAL 15, K9 6424.0. . . . . . . . . . . . . . . . . . . . . . . .
VALVE RELAY (ABS/ASC), K95 3450.1-00. . . . . . . . . . . . . . . . . . . . . . . . . . . .
VALVE, INDIVIDUAL CONTROL INTAKE SYSTEM, Y6167 1210.25-03. . .
VARIABLE CAMSHAFT CONTROL VALVE 1 (INLET), Y6275z 1210.25-03
VARIABLE CAMSHAFT CONTROL VALVE 1, Y6275 1210.17-01. . . . . . . .
VARIABLE CAMSHAFT CONTROL VALVE 2 (OUTLET),
Y6276 1210.25-03. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VEHICLE SPEED SENSOR, B10 6211.0-02. . . . . . . . . . . . . . . . . . . . . . . . . .

INDEX













VOLTMETER, B211 6211.0-05. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WASHER JET HEATER, LEFT, E51 6169.0-00. . . . . . . . . . . . . . . . . . . . . . . .
WASHER JET HEATER, RIGHT, E52 6169.0-00. . . . . . . . . . . . . . . . . . . . . . .
WASHER PUMP, M4 6160.1-01. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WASHER PUMP, M4 6160.1-02. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WATER VALVE, Y4z 6450.6-01. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WATER VALVE, Y4z 6450.6-05. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WINDOW DEFOGGER SWITCH, REAR, S76 6424.0. . . . . . . . . . . . . . . . . .
WINDOW DEFOGGER, REAR 6424.0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WINDOW MOTOR, DRIVER’S, M21 5133.0-02. . . . . . . . . . . . . . . . . . . . . . . .
WINDOW MOTOR, PASSENGER’S, M23 5133.0-02. . . . . . . . . . . . . . . . . . .
WINDSHIELD WASHER JET HEATERS 6169.0-00. . . . . . . . . . . . . . . . . . . .
WIPER MOTOR, M3 6160.1-00. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WIPER/WASHER INTERVAL CONTROL MODULE, REAR, A36 6160.1-02
WIPER/WASHER MODULE (WWM) 6160.1. . . . . . . . . . . . . . . . . . . . . . . . . . .
WIPER/WASHER MODULE, A51 6160.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WIPER/WASHER MODULE, A51 6167.1-00. . . . . . . . . . . . . . . . . . . . . . . . . .
WIPER/WASHER SWITCH, S5 6160.1-01. . . . . . . . . . . . . . . . . . . . . . . . . . . .
WIPER/WASHER SWITCH, S5 6160.1-02. . . . . . . . . . . . . . . . . . . . . . . . . . . .
WOOFER, REAR, H500 6510.1-02. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ZKE CENTRAL LOCKING (ZV) 5126.0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ZKE POWER WINDOWS (FH) 5133.0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .



2.5 VI/SW
0110.0 INTRODUCTION











P90
FRONT POWER
DISTRIBUTION
BOXF115A
GROUND
DISTRIBUTION
0670.46160.0-02 2.5 VI/SW 4 8P91
REAR POWER
DISTRIBUTION
BOX
F4430A
X29326
X293
FUSE DETAILS
0670.3
4 VI/SW 86
8530
87
X452
CENTRAL
BODY
ELECTRONICS
(ZKE)
6100.0 K11
WIPER RELAY
FUSE DETAILS
0670.3
X493
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.

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






INTRODUCTION







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.















CIRCUIT BREAKERVARIABLE RESISTANCE
SENSOR VARIABLE
CONTACT IS MOVED BY
AN EXTERNAL FORCE
VARIABLE RESISTOR RE-
SISTANCE IS CHANGED
BY TEMPERATURE OR
PRESSURE
DIODE CURRENT
CAN FLOW ONLY IN
DIRECTION OF AR-
ROW
ZENER DIODE TO
REGULATE VOLTAGE
LIGHT EMITTING
DIODE PERMANENT MAGNET
MOTOR ONE SPEED
PERMANENT MAGNET
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














A WAVY LINE
MEANS WIRE IS
CONTINUED
ENTIRE COM-
PONENT SHOWN
COMPONENT WITH
SCREW TERMI-
NALS
CONNECTOR AT-
TACHED TO COM-
PONENT
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 AT-
TACHED TO COM-
PONENT LEAD
(PIGTAIL)
COMPONENT CASE
ATTACHED DI-
RECTLY 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 NUM-
BERED FOR REF-
ERENCE 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 ME-
CHANICAL CON-
NECTION
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














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 RE-
SISTOR ACROSS
WINDINGTERMINAL
NUMBERTHREE POLE,
FOUR POSITION
SWITCHCOMPONENT NUM-
BER
S2
IGNITION SWITCH
0) OFF
1) ACCESSORY
2) RUN
3) START
TERMINAL
NUMBERDESCRIPTION
50 VOLTAGE: IGNI-
TION SWITCH IN
START
VOLTAGE: SUP-
PLIED AT ALL
TIMES
VOLTAGE: IGNI-
TION SWITCH IN
RUN OR START 30
15
15I
50 R30
INDICATES THAT
FUSE 9 IS SUP-
PLIED WITH POW-
ER AT ALL TIMES
CONTACT RELAY
WITH TWO OUT-
PUTSCHANGEOVER
RELAY WITH TWO
OUTPUTS
TERMINAL
NUMBERDESCRIPTION
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
NUMBERDESCRIPTION
VOLTAGE: IGNI-
TION SWITCH IN
RUN
VOLTAGE: IGNI-
TION SWITCH IN
ACCESSORY, RUN
OR START 15I
R
GROUND 31
POWER STATUS DESCRIPTION
VOLTAGE: SUP-
PLIED AT ALL
TIMES
VOLTAGE: IGNI-
TION SWITCH IN
RUN OR START
VOLTAGE: IGNI-
TION SWITCH IN
ACCESSORY, RUN
OR START
30 86
87 8530
86
87 85
NAME OF COM-
PONENT
F915A
2
10
32
10
32
10
3
SYMBOLS



SYMBOLS










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
PROGRESSION AND
FURTHER 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 CIRCUIT
A2
INSTRUMENT
CLUSTER
X16
11RXD
ARROW SHOWS
DIRECTION OF
CURRENT FLOW
AND IS REPEATED
WHERE CURRENT
PATH CONTINUES
X497
X1812615
X491