1999 BMW 318ti Electrical Troubleshooting Manual




COMPONENT LOCATION CHART






 

COMP.8500.0 7100.0LOCATION DESCRIPTION
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

E15 . .
LEFT PARK LIGHT . . . . . . . . . . . . . . . . . .
front of vehicle



E19 . .

RIGHT PARK LIGHT . . . . . . . . . . . . . . . .

front of vehicle




E26 . . LEFT FOG LIGHT . . . . . . . . . . . . . . . . . . . under LH front bumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0

E27 . . RIGHT FOG LIGHT . . . . . . . . . . . . . . . . . under RH front bumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0


E28 . .
FRONT CIGAR LIGHTER . . . . . . . . . . . .
center console



E29 . . FRONT CIGAR LIGHTER LIGHT . . . . . center console
E32z . REAR CENTER INTERIOR LIGHT . . . . in roof panel

E34 . .
FRONT DOME LIGHT/MAP READING
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . .
in roof panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0



E35 . .
DRIVER’S MAKE–UP MIRROR LIGHT
in sun visor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0



E36 . .

PASSENGER’S MAKE–UP MIRROR
LIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . .
in sun visor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0

E42 . . GLOVE BOX LIGHT . . . . . . . . . . . . . . . . . RH side of glove box
E43 . . LEFT LICENSE PLATE LIGHT . . . . . . . . underside of luggage compartment lid, near license plate . . . . . . . . . . . . . . 0
E44 . . RIGHT LICENSE PLATE LIGHT . . . . . . underside of luggage compartment lid, near license plate . . . . . . . . . . . . . . 0



E46 . .



LEFT LUGGAGE COMPARTMENT
LIGHT ASSEMBLY . . . . . . . . . . . . . . . .


in LH rear side of luggage compartment




COMPONENT LOCATION CHART






 

COMP.8500.0 7100.0LOCATION DESCRIPTION

E47 . .
RIGHT LUGGAGE COMPARTMENT
LIGHT ASSEMBLY . . . . . . . . . . . . . . . .
in RH rear side of luggage compartment




E51 . . LEFT WASHER JET HEATER . . . . . . . . on underside of engine hood

E52 . .

RIGHT WASHER JET HEATER . . . . . . .

on underside of engine hood




E56 . . DRIVER’S SEATBACK HEATER . . . . . . in upper LH front seatback
E57 . . DRIVER’S SEAT HEATER . . . . . . . . . . . under LH front seat

E58 . .
PASSENGER’S SEAT HEATER . . . . . . .
underside of RH front seat



E59 . . PASSENGER’S SEATBACK HEATER . in upper RH front seatback
E61 . . LEFT FRONT FOOTWELL LIGHT . . . . . LH footwell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0
E62 . . RIGHT FRONT FOOTWELL LIGHT . . . right footwell



E82 . .



TRANSMISSION POSITION INDICA-
TOR LIGHT . . . . . . . . . . . . . . . . . . . . . .


center console






E97 . . LIGHT SWITCH ILLUMINATION . . . . . . LH side of dash
E98 . . FOG LIGHT SWITCH ILLUMINATION . on instrument cluster

E103 .
CLIMATE CONTROL SWITCH
ILLUMINATION . . . . . . . . . . . . . . . . . . .
center console




F97 . . . FUSIBLE LINK . . . . . . . . . . . . . . . . . . . . . . rear of engine compartment

G1 . . .

BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . .

rear RH side of engine compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0


G5 . . . DRIVER’S AIR BAG GAS GENERATOR behind steering wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0


G6 . . .

PASSENGER’S AIR BAG GAS
GENERATOR . . . . . . . . . . . . . . . . . . . . .
behind glove box above . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0




COMPONENT LOCATION CHART






 

COMP.8500.0 7100.0LOCATION DESCRIPTION

G12 . .
DRIVER’S SIDE PYROTECHNICAL
BELT TENSIONER . . . . . . . . . . . . . . . .
driver’s seat right







G13 . .


PASSENGER’S SIDE
PYROTECHNICAL BELT
TENSIONER . . . . . . . . . . . . . . . . . . . . .

passenger’s seat left







G14 . .
LEFT SIDE AIR BAG GAS
GENERATOR . . . . . . . . . . . . . . . . . . . . .
in driver’s door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


0



G15 . .
RIGHT SIDE AIR BAG GAS
GENERATOR . . . . . . . . . . . . . . . . . . . . .
in passenger’s door





G6509
GENERATOR . . . . . . . . . . . . . . . . . . . . . .
front LH side of engine compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0

H1w . . ANTI–THEFT HORN (ALPINE) . . . . . . . in RH front bumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0
H2 . . . LEFT HORN . . . . . . . . . . . . . . . . . . . . . . . . front of engine compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0
H3 . . . RIGHT HORN . . . . . . . . . . . . . . . . . . . . . . front of engine compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0

H4 . . .

RIGHT FRONT TURN LIGHT . . . . . . . . .

RH front of vehicle




H5 . . . RIGHT REAR TURN LIGHT . . . . . . . . . . RH side of body rear end
H6 . . . LEFT REAR TURN LIGHT . . . . . . . . . . . LH side of body rear end

H7 . . .
LEFT FRONT TURN LIGHT . . . . . . . . . .
LH front of vehicle





H8 . . .

RIGHT FRONT AUXILIARY TURN
LIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . .
RH front of vehicle



H9 . . . LEFT FRONT AUXILIARY TURN LIGHT LH front of vehicle
H10 . . CHIME MODULE . . . . . . . . . . . . . . . . . . . above LH footwell dash panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0
H24 . . LEFT BRAKE LIGHT . . . . . . . . . . . . . . . . LEFT LUGGAGE COMPARTMENT LIGHT ASSEMBLY

H25 . .

LEFT TAIL LIGHT . . . . . . . . . . . . . . . . . . .

LEFT LUGGAGE COMPARTMENT LIGHT ASSEMBLY




COMPONENT LOCATION CHART






 

COMP.8500.0 7100.0LOCATION DESCRIPTION
H27 . . LEFT BACK UP LIGHT . . . . . . . . . . . . . . LEFT LUGGAGE COMPARTMENT LIGHT ASSEMBLY

H28 . .

RIGHT BACK UP LIGHT . . . . . . . . . . . . .

RIGHT LUGGAGE COMPARTMENT LIGHT ASSEMBLY




H30 . . RIGHT TAIL LIGHT . . . . . . . . . . . . . . . . . . RIGHT LUGGAGE COMPARTMENT LIGHT ASSEMBLY
H31 . . RIGHT BRAKE LIGHT . . . . . . . . . . . . . . . RIGHT LUGGAGE COMPARTMENT LIGHT ASSEMBLY

H34 . .
HIGH LEVEL STOP LIGHT . . . . . . . . . . .
at back of rear window shelf



H37 . .

LEFT TAIL LIGHT . . . . . . . . . . . . . . . . . . .

LEFT LUGGAGE COMPARTMENT LIGHT ASSEMBLY




H39 . . RIGHT TAIL LIGHT . . . . . . . . . . . . . . . . . . RIGHT LUGGAGE COMPARTMENT LIGHT ASSEMBLY
H42 . . LEFT MID–HIGH RANGE SPEAKER . . in upper LH front door

H43 . .
RIGHT MID–HIGH RANGE SPEAKER .
in upper RH front door



H45 . . RIGHT REAR SPEAKER . . . . . . . . . . . . . in RH side of luggage compartment
H46 . . LEFT REAR SPEAKER . . . . . . . . . . . . . . in LH side of luggage compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0


H50 . .
RIGHT FRONT HIGH RANGE
SPEAKER . . . . . . . . . . . . . . . . . . . . . . . .
in upper RH front door





H51 . .
RIGHT FRONT LOW RANGE
SPEAKER . . . . . . . . . . . . . . . . . . . . . . . .
in lower RH A–pillar





H52 . .
RIGHT REAR LOW RANGE SPEAKER
under rear window shelf



H53 . . RIGHT REAR HIGH RANGE SPEAKER under rear window shelf
H54 . . RIGHT FRONT MIDRANGE SPEAKER in upper RH front door
H55 . . LEFT FRONT MIDRANGE SPEAKER . in upper LH front door

H56 . .

LEFT REAR HIGH RANGE SPEAKER .

under rear window shelf




H57 . . LEFT REAR LOW RANGE SPEAKER . under rear window shelf




COMPONENT LOCATION CHART






 

COMP.8500.0 7100.0LOCATION DESCRIPTION
H58 . . LEFT FRONT LOW RANGE SPEAKER in lower LH A–pillar

H59 . .

LEFT FRONT HIGH RANGE SPEAKER

in upper LH front door




H66 . . SUBWOOFER . . . . . . . . . . . . . . . . . . . . . . at back of rear window shelf


H91 . .

RIGHT LUGGAGE COMPARTMENT
LIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . .
right rear light assembly




I1008 . SEAT MAT . . . . . . . . . . . . . . . . . . . . . . . . . passenger’s seat

K2 . . . .
HORN RELAY . . . . . . . . . . . . . . . . . . . . . .
rear LH side of engine compartment in Power Distribution Box . . . . . . . . . .

0


K4 . . . . BLOWER RELAY . . . . . . . . . . . . . . . . . . . rear LH side of engine compartment in Power Distribution Box . . . . . . . . . . 
0

K9 . . . . UNLOADER RELAY, TERMINAL 15 . . . below LH side of dash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0
K13 . . REAR DEFOGGER RELAY . . . . . . . . . . rear LH side of engine compartment in Power Distribution Box . . . . . . . . . . 
0

K16 . .

HAZARD FLASHER RELAY . . . . . . . . . .

rear LH side of engine compartment in Power Distribution Box . . . . . . . . . .


0


K19 . . COMPRESSOR CONTROL RELAY . . . rear LH side of engine compartment in Power Distribution Box . . . . . . . . . . 
0
K21 . . NORMAL SPEED RELAY . . . . . . . . . . . . rear LH side of engine compartment in Power Distribution Box . . . . . . . . . . 
0

K22 . .
HIGH SPEED RELAY . . . . . . . . . . . . . . . .
rear LH side of engine compartment in Power Distribution Box . . . . . . . . . .

0



K45 . .

FOLDING SUNROOF COMFORT
RELAY . . . . . . . . . . . . . . . . . . . . . . . . . . .
below LH side of dash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0

K46 . . HIGH BEAM LIGHT RELAY . . . . . . . . . . below LH side of dash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0
K46z . DAY LIGHT RELAY MODULE . . . . . . . . below LH side of dash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0
K47 . . FRONT FOG LIGHT RELAY . . . . . . . . . . rear LH side of engine compartment in Power Distribution Box . . . . . . . . . . 
0


K48 . .

LOW BEAM LIGHT RELAY . . . . . . . . . . .

rear LH side of engine compartment in Power Distribution Box . . . . . . . . . .


0


K125 . ABS PUMP MOTOR RELAY, TIMED . . . Power Distribution Box rear LH side of engine compartment . . . . . . . . . . . . 
0




COMPONENT LOCATION CHART






 

COMP.8500.0 7100.0LOCATION DESCRIPTION
K6300 ENGINE CONTROL MODULE RELAY . rear LH side of engine compartment in Power Distribution Box . . . . . . . . . . 
0

K6301w

FUEL PUMP RELAY . . . . . . . . . . . . . . . .

rear LH side of engine compartment in Power Distribution Box . . . . . . . . . .


0


K6304 SECONDARY AIR PUMP RELAY . . . . . rear LH side of engine compartment in Power Distribution Box . . . . . . . . . . 
0
K6326 UNLOADER RELAY, TERMINAL 15 . . . rear RH side of engine compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0

L1 . . . .
EWS TOROIDAL COIL . . . . . . . . . . . . . .
at ignition switch



M2 . . .

FUEL PUMP . . . . . . . . . . . . . . . . . . . . . . . .

below RH side of rear seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0


M3 . . . WIPER MOTOR . . . . . . . . . . . . . . . . . . . . rear of engine compartment below center of cowl . . . . . . . . . . . . . . . . . . . . . 0
M4 . . . WASHER PUMP . . . . . . . . . . . . . . . . . . . . front RH side of engine compartment on washer fluid reservoir . . . . . . . . . . 0

M7 . . .
HEADLIGHT/FOG LIGHT WASHER
PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . .
front RH side of engine compartment on washer fluid reservoir . . . . . . . . . .

0



M9 . . .

AUXILIARY FAN MOTOR . . . . . . . . . . . .

behind front grille behind trim panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0


M12 . . DRIVER’S DOOR LOCK MOTOR . . . . . in lower LH front door behind trim panel
M13 . . PASSENGER’S DOOR LOCK MOTOR in lower RH side of front door behind trim panel

M16 . .
GAS FILLER LOCK MOTOR . . . . . . . . .
in RH rear side of luggage compartment behind trim panel . . . . . . . . . . . . .

0



M17 . .

LUGGAGE COMPARTMENT LOCK
MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . .
rear side of luggage compartment behind trim panel . . . . . . . . . . . . . . . . . . .

0

M21 . . DRIVER’S WINDOW MOTOR . . . . . . . . LH front door behind door panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0
M23 . . PASSENGER’S WINDOW MOTOR . . . . RH front door behind door panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0

M24z . FOLDING SUNROOF MOTOR . . . . . . . . in roof panel



M25 . .



CRUISE CONTROL ACTUATOR
(TEMPOMAT) . . . . . . . . . . . . . . . . . . . . .


front LH side of engine compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


0



M30 . . BLOWER MOTOR . . . . . . . . . . . . . . . . . . rear of engine compartment behind RH fresh air cowl




COMPONENT LOCATION CHART






 

COMP.8500.0 7100.0LOCATION DESCRIPTION

M50 . .
DRIVER’S SEAT CUSHION TILT
MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . .
under driver’s seat




M51 . . DRIVER’S SEAT MOVEMENT MOTOR under driver’s seat

M52 . .

DRIVER’S SEAT HEIGHT MOTOR . . . .

under driver’s seat






M53 . .

DRIVER’S SEATBACK RECLINER
MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . .
under driver’s seat






M58 . .

PASSENGER’S SEATBACK RECLINER
MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . .
under passenger’s seat




M59 . . PASSENGER’S SEAT HEIGHT MOTOR under passenger’s seat

M60 . .
PASSENGER’S SEAT MOVEMENT
MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . .
under passenger’s seat





M61 . .
PASSENGER’S SEAT CUSHION TILT
MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . .
under passenger’s seat





M93 . .

AUXILIARY THROTTLE POSITION
MOTOR (ADS) . . . . . . . . . . . . . . . . . . . .

LH side of engine compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


0



M111 .

FRESH AIR RECIRCULATION MOTOR

behind center of dashboard




M6510 STARTER . . . . . . . . . . . . . . . . . . . . . . . . . . rear LH side of engine compartment
N8 . . . ANTENNA AMPLIFIER AM/FM . . . . . . . on lift gate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0

N9 . . .
RADIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
center console





N12w .

ANTI–THEFT CONTROL MODULE
(ALPINE) . . . . . . . . . . . . . . . . . . . . . . . . .
RH side of dash behind glove box




N17 . . CRASH CONTROL MODULE . . . . . . . . . behind instrument cluster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0
N22 . . CD CHANGER . . . . . . . . . . . . . . . . . . . . . . in LH forward side of luggage compartment




COMPONENT LOCATION CHART







 

COMP.8500.0 7100.0LOCATION DESCRIPTION
P90 . . FRONT POWER DISTRIBUTION BOX rear LH side of engine compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0


P95 . .

AUXILIARY FUSE BOX . . . . . . . . . . . . . .

below LH side of dash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


0


P97 . . AUXILIARY FUSE BOX . . . . . . . . . . . . . . below LH side of dash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0
R11 . . BLOWER RESISTORS . . . . . . . . . . . . . . behind center of dashboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0


R6252
THROTTLE POSITION SENSOR . . . . .
LH side of engine compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0


R6255z

THROTTLE POSITION SENSOR (ASC)

LH side of engine compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


0


S2 . . . . IGNITION SWITCH . . . . . . . . . . . . . . . . . . LH side of dash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0


S3 . . . .

AUTOMATIC TRANSMISSION RANGE
SWITCH . . . . . . . . . . . . . . . . . . . . . . . . .
center console . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0


S4 . . . . HORN SWITCH . . . . . . . . . . . . . . . . . . . . . on steering wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0

S5 . . . .

WIPER/WASHER SWITCH . . . . . . . . . . .

LH side of dash RH side of steering column above




S6 . . . . ASC SWITCH . . . . . . . . . . . . . . . . . . . . . . center console
S7 . . . . COMBINATION SWITCH . . . . . . . . . . . . . LH side of dash LH side of steering column above . . . . . . . . . . . . . . . . . . . . 0

S8 . . . .
LIGHT SWITCH . . . . . . . . . . . . . . . . . . . . .
LH side of dash



S13 . . PASSENGER’S DOOR JAMB SWITCH RH front door jamb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0
S14 . . DRIVER’S DOOR JAMB SWITCH . . . . . front LH door pillar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0
S17 . . MIRROR CONTROL SWITCH . . . . . . . . in upper LH front door

S18 . .

HAZARD SWITCH . . . . . . . . . . . . . . . . . .

below front of console . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0


S21w . ENGINE HOOD SWITCH . . . . . . . . . . . . front RH side of engine compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0
S28 . . CRUISE CONTROL SWITCH . . . . . . . . . LH side of dash RH side of steering column above . . . . . . . . . . . . . . . . . . . . 0

S29 . .
BRAKE LIGHT SWITCH . . . . . . . . . . . . .
LH footwell on brake pedal support bracket behind LH footwell trim . . . . . .
0