coolant temperature BMW M3 1998 E36 Electrical Troubleshooting Manual




COMPONENT LOCATION CHART
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COMP.8500.0 7100.0LOCATION DESCRIPTION
B25y . FUEL TANK SENSOR II . . . . . . . . . . . . . . . . . top of fuel tank

B72 . .
FUEL TANK PRESSURE SENSOR . . . . . . . .
RH rear wheel well behind trim panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14-1

B78 . . DRIVER’S SIDE IMPACT SENSOR . . . . . . . in lower LH B–pillar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39-2
B79 . . PASSENGER’S SIDE IMPACT SENSOR . . . in lower RH B–pillar
B6203 CRANKSHAFT POSITION/RPM SENSOR . front of engine below . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

B6204
CAMSHAFT POSITION SENSOR
(CYLINDER IDENTIFICATION) . . . . . . . . .
front of engine below intake manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11-1



B6204
CAMSHAFT POSITION SENSOR
(CYLINDER IDENTIFICATION) . . . . . . . . .
front of engine below intake manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12-2


B6205 INTAKE AIR TEMPERATURE SENSOR . . . front LH side of engine compartment (318is) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-2

B6205
INTAKE AIR TEMPERATURE SENSOR . . .
LH side of engine near oil level stick . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
36-3

B6207 HOT FILM AIR MASS METER . . . . . . . . . . . . LH side of engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1
B6209 HALL EFFECT CAMSHAFT SENSOR . . . . . front of engine (318is)
B6217 HOT FILM AIR MASS METER . . . . . . . . . . . . top front of engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-2
B6231 OIL PRESSURE SWITCH . . . . . . . . . . . . . . . . front of engine below intake manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1

B6231

OIL PRESSURE SWITCH . . . . . . . . . . . . . . . .

front of engine below intake manifold (318is) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17-1




B6232

ENGINE COOLANT TEMPERATURE
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . .
front of engine below intake manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11-3



B6232

ENGINE COOLANT TEMPERATURE
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . .
front of engine below intake manifold (318is) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17-2

B6233 AIR FLOW SENSOR . . . . . . . . . . . . . . . . . . . . LH side of engine compartment right of LH side shock tower


B6236

ENGINE COOLANT TEMPERATURE
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . .
front of engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11-3


B6238 OIL TEMPERATURE SENSOR . . . . . . . . . . . LH side of engine




COMPONENT LOCATION CHART
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COMP.8500.0 7100.0LOCATION DESCRIPTION
B6240 KNOCK SENSOR . . . . . . . . . . . . . . . . . . . . . . . top front of engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2

B6256
DUAL TEMPERATURE SENSOR
(COOLANT TEMPERATURE) . . . . . . . . . .
RH front of engine below intake manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11-1



B9508
PRESSURE SWITCH . . . . . . . . . . . . . . . . . . . .
front RH side of engine compartment near RH headlight assembly . . . . . . . . . . . . . .
09-3

B62001

OXYGEN SENSOR (IN FRONT OF
CATALYTIC CONVERTER) . . . . . . . . . . . . .

on catalytic converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37-1



B62002

OXYGEN SENSOR (BEHIND CATALYTIC
CONVERTER) . . . . . . . . . . . . . . . . . . . . . . . .

on catalytic converter (318is) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37-2



B62101

OXYGEN SENSOR I (IN FRONT OF
CATALYTIC CONVERTER) . . . . . . . . . . . . .

on catalytic converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

38-2



B62102
OXYGEN SENSOR I (BEHIND CATALYTIC
CONVERTER) . . . . . . . . . . . . . . . . . . . . . . . .
on catalytic converter





B62201
OXYGEN SENSOR II (IN FRONT OF
CATALYTIC CONVERTER) . . . . . . . . . . . . .
on catalytic converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

38-2



B62202
OXYGEN SENSOR II (BEHIND CATALYTIC
CONVERTER) . . . . . . . . . . . . . . . . . . . . . . . .
on catalytic converter





C101 .
CONTACT RING . . . . . . . . . . . . . . . . . . . . . . . .
top of steering column . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24-2

C900 . SUPPRESSION FILTER . . . . . . . . . . . . . . . . . in upper RH C–pillar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-2
D100 . DATA LINK CONNECTOR . . . . . . . . . . . . . . . . rear RH side of engine compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05-1
E10 . . REAR DEFOGGER/ANTENNA . . . . . . . . . . . in rear window
E11 . . . LEFT HIGH BEAM LIGHT . . . . . . . . . . . . . . . . near LH headlight assembly

E12 . .
RIGHT HIGH BEAM LIGHT . . . . . . . . . . . . . .
near RH headlight assembly



E13 . . LEFT LOW BEAM LIGHT . . . . . . . . . . . . . . . . near LH headlight assembly
E14 . . RIGHT LOW BEAM LIGHT . . . . . . . . . . . . . . . near RH headlight assembly




COMPONENT LOCATION CHART
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COMP.8500.0 7100.0LOCATION DESCRIPTION
S36y DOUBLE TEMPERATURE SWITCH . . . . . . . RH top of radiator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 09-3

S38 . .
TILT/SLIDE SUNROOF SWITCH (SHD) . . . .
roof



S40y . CENTRAL POWER WINDOW SWITCH . . . . center console


S41y .

LH REAR DOOR POWER WINDOW
SWITCH (DOOR) . . . . . . . . . . . . . . . . . . . . .
in lower LH rear door behind trim panel






S42y .

RH REAR DOOR POWER WINDOW
SWITCH (DOOR) . . . . . . . . . . . . . . . . . . . . .
in lower RH rear door behind trim panel




S53 . . DRIVER’S SEAT, SEAT HEATER SWITCH . center console near gearshift lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-2


S54 . .

PASSENGER’S SEAT, SEAT HEATER
SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
center console near gearshift lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

30-1


S58 . . DRIVER’S SEAT BELT SWITCH . . . . . . . . . . in LH front seat belt buckle
S59 . . PASSENGER’S SEAT BELT SWITCH . . . . . in RH front seat belt buckle

S61y .
LUGGAGE COMPARTMENT LIGHT
SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
underside of luggage compartment lid left . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

34-2


S63 . . ENGINE COOLANT LEVEL SWITCH . . . . . . front RH side of engine compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-1

S64 . .

WASHER FLUID LEVEL SWITCH . . . . . . . . .

front RH side of engine compartment on washer fluid reservoir . . . . . . . . . . . . . . . . .

10-1


S75 . . BLOWER SWITCH . . . . . . . . . . . . . . . . . . . . . . center of dash
S77 . . DRIVER’S MAKE–UP MIRROR SWITCH . . above LH sun visor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38-1

S78 . .
PASSENGER’S MAKE–UP MIRROR
SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
above RH sun visor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

23-1


S123 . ABS PEDAL TRAVEL SENSOR . . . . . . . . . . . near brake master cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-3

S124 .
RIGHT REAR DOOR CONTACT . . . . . . . . . .
rear RH door pillar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
33-3

S125 . LEFT REAR DOOR CONTACT . . . . . . . . . . . LH rear door jamb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-3




COMPONENT LOCATION VIEWS $%%





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B6204
CAMSHAFT
POSITION SENSOR
(CYLINDER
IDENTIFICATION)
B6232
ENGINE COOLANT
TEMPERATURE
SENSOR B6240
KNOCK SENSOR
Y6130
IDLE SPEED
CONTROL VALVE
X6130
B6231
OIL PRESSURE
SWITCH
B6256
DUAL
TEMPERATURE
SENSOR
(COOLANT
TEMPERATURE)X6231
X6256
B6236
ENGINE COOLANT
TEMPERATURE
SENSORX6130



Y6130
IDLE SPEED
CONTROL VALVE






COMPONENT LOCATION VIEWS $%%





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B6231
OIL PRESSURE
SWITCH
R6252
THROTTLE
POSITION SENSOR
B6232
ENGINE COOLANT
TEMPERATURE
SENSOR
X6256
X6231
T6151
CYL. 1 IGNITION
COIL
T6152
CYL. 2 IGNITION
COILT6153
CYL. 3 IGNITION
COIL
T6154
CYL. 4 IGNITION
COIL

318is318is 318is






COMPONENT LOCATION VIEWS $%%





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M9
AUXILIARY FAN
MOTOR
B18
BRAKE FLUID
LEVEL SWITCH B6205
INTAKE AIR
TEMPERATURE
SENSOR
S123
ABS PEDAL
TRAVEL SENSOR
X20
X69X111X1162
S63
ENGINE COOLANT
LEVEL SWITCH
X82
X112


318is
B6217
HOT FILM AIR
MASS METERX70
X6205X6217
M25
CRUISE CONTROL
ACTUATOR
(TEMPOMAT)