BMW 3 (E46). Manual — part 271
630-1
General
This repair group covers interior and
exterior lighting, including repairs to the
light switch assembly.
Special tools
Some special tools may be necessary
to install or adjust lights and light
fixtures.
Plastic trim prying tool BMW 00 9 321
Foglight/headlight adjusting tool 4
mm/6 mm Allen
Bulb applications
For convenience, the bulb applications
for E46 cars are listed in
Table a
.
Table a. E46 bulb applications
Location
Type & rating
Headlights
High beam
H7 12V 55W
Low beam
(Halogen)
H7 12 V 55 W
Table a. E46 bulb applications
Location
Type & rating
Low bean (Xenon)
D2-S
Foglights
Front
HB4
Rear (Euro only)
12V 21W
Turn signal and taillight
Back-up
12V 21W
Brake
12V 21W
Brake/taillight
12V 21/4W
Licence plate
12V 5W
Side turn signal
W5W
Third brake light
LED
Turn signal (front
or rear)
12V 21W
Interior lights
Footwell
Softlite 5W
Glove compartment Softlite 5 W
Passenger
compartment, front
or rear
Softlite 5W
Reading, front or
rear
6W
Trunk or tailgate
Softlite 10W
Visor vanity
Softlite 10W
Light switch center (LSZ)
The light switch center (LSZ), mounted
in the left side of the dashboard,
consists of the following components:
Headlight/taillight/running light
control switch
Foglight switch
Instrument dimmer control
Light control module
In addition to normal light control, the
LSZ provides the following functions:
Hot and cold monitoring of the
exterior bulbs
Emergency lighting function
Short circuit protection
Redundant storage of mileage
and service interval data
Automatic headlight adjustment
(LWR) programmed control (if
equipped)
Bulb monitoring
The light control module monitors the
following bulbs in both hot and cold
states:
High/low beams
Brake lights
Turn signal lights
Taillights
Parking lights
Side marker lights
License plate lights
Hot and cold monitoring of light bulbs
allows the LSZ to detect defective
bulbs. Hot monitoring checks the
continuity of circuits while the lights are
switched on. Cold monitoring consists
of a brief pulse of current which is too
short for the lights to illuminate.t If the
module detects a defective bulb, a
signal is sent to the instrument cluster
and Check Control is illuminated with
the appropriate warning.
Home lighting
This convenience feature provides
lighting for the driver and passengers
to leave the vehicle and enter their
house. The feature is switched on by
activating the headlight flasher switch
after the lights and ignition are
switched OFF. The feature is switched
off after the coded time delay or by
switching the ignition ON.
Redundant data storage
The light control module serves as the
redundant storage module in parallel
with the instrument cluster. This
includes all data used for vehicle
identification, encoded on the
assembly line. In addition the total
mileage and service interval data are
also stored in the light control module.
If either the instrument cluster or light
control module has to be replaced, the
data is taken from the remaining
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