1998 BMW 528i DISA

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Central Locking and Anti-Theft
Trunk lock
6 Tr~nk ftey pos~rions for eecir'cal mama, locking and
-nlock~ng are:
1. Manual unock .. - - - ........ - ..- .- ................. s.=.=-- 2. Unlock. DWA oisarmed, conven:ence open
(nold
un1:l aclivaledj
3. Ne~tral posit'on
1. -ocn. DWA armeo, Convenience closng
(hold ~nti activated)
5. Valet .oc,t position
. -- .............-... .- . - -.....
Key memory
< The remote trunk button (arrow) is located in the lefl lticlc
panel.
- The trunk can be opened from this remote release when the
doors are locked from the central locking button. The
trunk
remote button is disabled when the trunkis loclted in the valet
position or when a speed signal of
4 mph is present at the
GM.
Remote entry (FZV)
< The €39 remote (keyless) entry system (FZV) uses a tiny ra-
dio transmitter in the vehicle key to
lock and unlock the doors
and the trunk by remote control. There are a number of other
features incorporated in FZV:
Locltinglunloclting of fuel filler lid
Selective unlocking of driver's door (as with key in lock)
Armingldisarming of DWA alarm system
Remote unlocking of
trunk lid or tailgate
Comfort opening of windows and sunroof
* Interior lighting activation
Panic mode alarm activation
* Models to 1999: Key incorporates LED. LED informs oper-
ator that an FZV signal is being transmitted. LED is also
useful indicator of key initialization status and lkey self-test.
Keys delivered with four different colored labels. This is
helpful to differentiate FZV keys during initialization,
pre.
venting possibility of misassigning key ID which would
change coded Key Memory functions.

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515-9
Central Locking and ~nti-~heftl
FZV keys
4 FZV key button functions:
Bunon 1 press once:
Unlock driver's door
DWA disarmed
/ lnterior lights on
... - 0021~0~~j
Convenience opening
2000
-
'.-,- /- ..,.
Button 2 press
once:
Button
1 press twice:
a Total
unlocking
Button
1 hold:
* Lock
- DWA armed
lnterior lights ON when vehicle is locked
Button
2 press twice within 10 seconds:
Deactivate interior and tilt monitoring
Button 3 press momentarily:
Trunk lid opens
Button
3 press and hold:
Panic mode (alarm)
LED
(4) provides feedback of system operation and battery
condition. LED is eliminated from 2000 and later
lkeys.
LED flashes indicate the following:
One flash indicates that FZV
lock I unlock signal was sent
and batteries are OK.
Quick flashing LED indicates that convenience opening
signal is being sent.
Slow flashing LED indicates that initialization procedure
was successful.
A steady-on LED [after a self test as described in Trans-
mitter self-test (models to
1999)l indicates that hard-
warelsoftware of transminer are OK.
No LED activity could indicate discharged batteries or de-
fective
transmitter.

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51 5-12
I Central Locking and Anti-Theft
Key battery
9
4 1997 - 1999 models: Two lithium batteries are used to sup-
ply power to key transmitter. When replacement is neces-
sary, remove cover and two fasteners (arrows) from rear of
key to access batteries
NOTE-
If you replace the batteries within one minute, the FZV ley
will not require a new initialization procedure.
2000 and later models: FZV key battery is recharged by ring
antenna while ltey is in ignition switch. There is no need to re-
place ltey battery.
Car Memory 1 Key Memory
A number of features and functions can be customized to the
driver(s) preference. The identity of the vehicle user is provid-
ed by a
s~gnal from the keyless entry system (FZV).
Car Memory and Key Memory are actually two separate func-
tions, although they are marketed as a combined feature.
Car Memory
Pr'or ro new
veh c,e de very, the BMW scan roo (DISp us,
GTI or MOD C) is ~sed lo cooc ine driver preierences nro ine
appropriate control modules. Thereafter these choices can-
not be changed without
recoding with a BMW scan tool.
The functions that can be set using Car Memory include:
Alarm system (DWA) features such as armingldisarming
with
lkeyless entry (FZV), activation of tilt sensor or interior
sensor
lnterior light activation when central
locking is used
Convenience opening of
windows/sunroof
lnterior and external lighting preferences
Heating
I A/C preferences (IHKA)
Seat and mirror preferences (triggered by Key Memory)
Instrument cluster display units (for example: km vs. miles)

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51 5-24
l~entral Locking and Anti-Theft
ANTI-THEFT SYSTEM (DWA)
When the anti-then system (DWA) is armed, the doors, hood,
windows, trunk lid or tailgate are monitored against forcible
entry by switches and sensors. The vehicle is protected
against being jacked up or towed away by a tilt sensor.
The control electronics for DWA are integrated in the General
Module (GM). In addition to the control electronics, the sys-
tem includes the following components.
* DWA horn
DWA LED indicator
- Tilt sensor
- Monitoring switches and sensors
The system can be armed or disarmed from the driver's door
lock,
trunklid lock, tailgate lockorthe remote transmitter (FZV
Itey). When armed, the alarm horn
soundsfor30seconds and
the low beam headlights and turn signals flash for
5 minutes.
The electronic immobilizer (EWS) is also activated when
DWA is activated.
The alarm is switched off immediately if key is inserted in door
loclt or FZV key button is used.
DWA LED Status
The DWA status LED is located in the rear view mirror (ar-
row). When DWA is armed, the LED flashes slowly to indi-
cate armed status.
The LED and exterior lights flash once and the alarm horn
sounds when the system is successfully armed ordisarmed.
The LED will continue to flash slowly denoting the armed sta-
tus. If any monitored input is not closed when the system is
armed, the LED will flash rapidly for
10 seconds to indicate
the fault.
Tilt sensor
-
4 The tilt sensor, located on the left side of trunlt or cargo com- -
partment, consists of a conductive liquid chamber, a proces-
sor board and metal probes. The probes are submersed in
the liquid and produce a resistance value dependent on the
tilt of the sensor (angle of the vehicle). This resistance be-
comes the reference value when the DWA system is armed.
.-

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51 5-26
Central Locking and Anti-Theft
Interior sensor UIS (2000 and later models)
The
UIS system uses ultrasonic sound waves instead of elec-
tromagnetic waves. Ultrasonic sound waves are less suscep-
tible to magnetic interference.
Every time the DWA system is armed, the sensor adapts to
whatever objects might be stationary in the interior. The sen-
sor emits ultrasonic waves in a programmed timed cycle. It re-
ceives echoes of the emitted waves. The
UIS amplifies the
received sound wave signals and compares them to the ech-
oes of the transmitted waves. The
UIS also checits the incom-
ing echoes for background hiss (wind noise through a
partially open window) and adapts for this.
If the echoes are consistently similar, no movement is de-
tected.
If the echoes are altered, (inconsistent), the UIS deter-
mines motion in the interior compartment.
If motion is detected, the
UIS changes to a constant cycle
and the echo is compared again.
If the inconsistency is still present the
UIS sends the acti-
vate siren signal to the GM.
Glass breakage sensors
The doorwindows are monitored by inductive sensors mount-
ed on the inside of the door behind the trim panel. A closed
window is recognized by a magnetic plate
on the glass lining
up with the sensor. If the glass is broken, the plate falls away
and the signal from the sensor changes. This causes the GM
to activate the alarm.
Emergency disarming
- An emergency procedure is provided to cancel the DWA in
the event that a fault occurs within the system. The procedure
is as follows:
Driver's door mechanically
unloclted and open within 30
seconds. This will cause triggering of alarm.
All doors closed.
Ignition switch turned to
KL R (ACCESSORY). LED indica-
tor will come on.
- After 10 minutes, alarm is disarmed

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On-Board Diagnostics
Catalyst monitoring. Thisstrategy monitors the outputofthe
precatalyst and post-catalyst oxygen sensors, comparing the
oxygen content going into the catalytic converter to the
oxygen leaving the converter.
The diagnostic executive
lknows that most of the oxygen
should be used up during the oxidation phase. If it detects
higherthan programmed values, afault is set and the MIL
illuminates.
Misfire detection. This strategy monitors crankshaft speed
fluctuations and determines if an enoine misfire occurs bv
monitoring variations in speed between each crankshaft
sensortrigger point. This strategy is so finely tuned that it can
determine the severity of the misfire.
The system determines
if a misfire is occurring, as well as
other pertinent misfire
information such as:
Specific
cylinder(s)
Severity of the misfire event
Emissions relevant or catalyst damaging
Misfire detection is an on-going monitoring process that is
only disabled under certain limited conditions.
Secondary air injection monitoring. Secondary air
injection is used to reduce HC and CO emissions during
engine warm up. Immediately following a cold engine start
(-1 0" to 40°C), fresh air (and therefore oxygen) is pumped
directly into the exhaust
manifold. By injecting additional
oxygen into the exhaust manifold, catalyst warm-up time is
reduced.
Secondary air system components are:
Electric air injection pump
* Electric pump relay
* Non-return valve
Vacuum
I vent valve
- Stainless steel air injection pipes
Vacuum reservoir
The secondary air system is monitored via the use
of the pre-
catalyst oxygen sensors. Once the air pump is active and air
is injected into the system, the signal at the oxygen sensor
reflects a lean condition. If the oxygen sensor signal does not
change, a fault is set and the faulty
bank(s) identified. If after
completing the next cold startafault is again present, the MIL
illuminates.

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On-Board ~ia~nosticsl
I I
PO340 1113 I Camshaft Position Sensor 'A' Circuit (Bank 1 or Single Sensor)
Engine
diagnostic trouble codes:
M62 engine (continued)
P-code
PO342
PO343
PO345
PO347
PO348
PO363
PO370
PO41 2
PO335 I111 I Crankshaft Position Sensor 'A' Circuit
BMW-FC
I I -
I I -
PO445 1 98 1 Evaporative Emission System Purge Control Valve Circuit Shorted
Explanation
113
113
114
114
114
62 112
85
PO41 3
PO41 8
PO420
PO430
PO440
PO442
PO442
PO443
PO444
Camshaft Position Sensor 'A' Circuit Low (Bank 1 or Single Sensor)
Camshaft Position Sensor
'A' Circuit High (Bank 1 or Single Sensor)
Camshaft Position Sensor
'A' Circuit (Bank 2)
Camshaft Position
Sensor'A' Circuit Low (Bank 2)
Camshaft Position Sensor 'A' Circuit High
(Banic 2)
Misfire Detected
- Fueling Disabled
Timing Reference High Resolution Signal
'A'
Secondary Air lniection System Switchinq Valve A Circuit
PO41 4 / 85 I Secondary Air Injection System Switching Valve A Circuit Shorted
85
84
40
45 93 183
188
98
98
PO450
PO452
PO453
PO455
PO456
PO491
PO492
PO500
PO506
I I
PI102 1163 I Idle Control System, Adaptation of Unmetered Air Mass Too Low
Secondary
Air Injection System Switching Valve A Circuit Open
Secondary Air Injection System Control
'A' Circuit
Catalyst System Efficiency Below Threshold (Bank 1)
Catalyst System Efficiency
Below Threshold (Bank 2)
Evaporative Emission System
Evaporative Emission System Leak Detected (small
leak)
Evaporative Emission System Leak Detected (small leak)
Evaporative Emission System Purge Control Valve Circuit
Evaporative Emission System Purqe Control Valve Circuit Open
I
I
185
185
185
183
187
80
81 120
32
PO507
Evaporative Emission System Pressure SensorISwitch
Evaporative Emission System Pressure SensorISwitch Low
Evaporative Emission System Pressure
SensorISwitch High
Evaporative Emission System
Leaic Detected (large leak)
Evaporative Emission System
Leal$ Detected (very small leak)
Secondary Air Injection System Insufficient Flow (Bank
1)
Secondary Air Injection System insufficient Flow (Bank 2)
Vehicle Speed Sensor
'A'
idle Air Control System RPM Lower Than Expected
PI103
PI130
PI131
PO600 1 220 I Serial Communication Link
32
idle Air
Control System RPM Higher Than Expected
163
17
23
Idle Control System, Adaptation of Unmetered Air Mass Too Large
02 Sensor Circuit Dynamic Test (Bank
1 Sensor 2)
02 Sensor Circuit Dynamic Test (Bank 2 Sensor 2)

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INDEX 'tl
WARNING
Your common sense, good
judgemenl, and general alertness are
crucial to sale and successiul service
worlr. Belore attempting any work on
your
BMM be sure lo read 001
General Warnings and Cautions
and the
copyriglll page at the front 01
the manual. Review these warnings
and
caulions each lime you prepare
lo work on your BMW. Please also
read any warnings and cautions that
accompany
tile procedures in the
manual.
312-way valve (running losses)
see Fuel tank
Abbreviations, commonly used 600-14
ABS (antilock brake system)
see
Bral(es
A/C air distribution motors
see stepper motors (below)
blower final stage (resistor pack),
replacing
640-16
blower, removinglinslalling
640-1 5
compressor, replacing
640-24 condenser, replacing 64045
control panellmodule, removing1
installing
640-1 1
evaporakr, removinglinstalling 640-29
evaporator temperature sensor
640-12 expansion valve, removinglinstailing
640-27
IHKA/ IHKR system description 640-5
receiveridrier, replacing 640-26
stepper motors 640-1 3 ventilation microiilter, replacing
020-22. 640-17
see also Heating
Accelerator
iinlcage
see Maintenance
Activated carbon canister
see Fuel tank
ADS (auxiliary throttle valve)
130-57
Air compressor
330-44
Air conditioning
see
AIC
Air distribution (flap) motors
seeNC, stepper motors
Air filter see Maintenance
Air spring
300-6, 330-12
Airbag system (SRS)
2-stage
airbag 721-4
control module, replacing 721-7 driver airbag, removinglinstalling
721-8
iiead protection airbag 721-12 components 721-1 1
indicator
lighl721-4
passenger airbag, removinglinstalling
721-9 side-impact airbags crash sensor,
replacing
721-7
Airflow sensor see 130 under appropriate
fuel
injection system
Air pump
see 130 under appropriate fuel
injection system, secondary air
injection system
Air suspension
see Electronic height control
(EHC)
Alarm
see Anti-theft alarm
Alignment see
Wheei alignment
Aluminum suspension components
300-2
Antenna 650-6
Alternator see Battery, starter, alte rnator
Amplifier
650-4
Anti-theft alarm (DWA)
515-24 emergency disarming 515-31
Antifreeze (engine coolant)
see Maintenance
see also Cooling system
Antilock brake system (ABS) see Brakes
ASC see Brakes
ATF (automatic transmission fluid)
see Automatic transmission
see also Cooling systern
Automatic headlight adjustmenl
(LWR) see Lights
Automatic seat belt tensioner
720-4
Automatic shiftloclc
see
Gearshift
Automatic transmission
applications
200-3, 240-4
ATF 020-10, 200-4
capacity 240-8 checking 240-6
drainingifilling 240-7
heat exchanger 170-5
fluid pan and strainer 240-9 gearshift
see Gearshift
ID tag
200-3 range switch 610-6
removaliinstallation 240-10
steptronic see Gearshift
Auxiliary cooling fan
see
Coollng system, electric Ian
Auxiliary throttle valve (ADS)
130-57
Axle joint
see Drive axle
Back-up light switch
automatic transmission see Automatic transmission. range switch
- .~.~~~
manual transmission 230-8 -
- I