dwa BMW X5 2003 E53 Central Body Electronics Workshop Manual

TABLE OF CONTENTS
Subject Page
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Power Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Windshield Wiping/Washing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Optional Rain Sensor (AIC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Central Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Remote RF Keyless Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Model Year 2000 FZV Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Car Memory / Key Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Power Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Window Anti-Trap Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Interior Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Anti-Theft (DWA) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Tilt Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Interior Protection (UIS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Alarm Siren . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Alarm Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Seat Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Mirror Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Seat Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Steering Column Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
General Functions of ZKE III . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Diagnosis/Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
Revised 6-96

INTRODUCTION
The Central Body Electronics (ZKE III) equipped on the X5 includes the following sub-
systems under the total scope of its control:
• Windshield/tailgate wiping/washing,
including windshield rain sensor (AIC).
• Interior lighting
• Central locking
• Keyless entry
• Tailgate release
The following is an overview of new or changed features found on the X5 ZKE III variant.
• Passenger’s door module is now incorporated into the passenger’s door switchblock
module.
• Sunroof module (SHD) located on the K bus.
• The Central Locking system uses a new style door lock actuator with hall effect sensors
similar to E46.
• The GM III is responsible for the Key Memory feature. It provides the added
convenience of identifying users of the vehicle. Whenever the vehicle is locked or
unlocked via the FZV keyless entry system, a unique key identification signal (key
number) is transmitted to the General Module.
The key identification signal alerts the GM to communicate with other control systems
over the K Bus to store (when locked) or reset (when unlocked) certain driver adjustable
settings for the driver using the specific key. The GM also resets certain driver
adjustable settings that it controls directly.
• Power windows/Sunroof
• DWA alarm system
• Mirror - adjustment/memory/heating
• Seat adjustment/memory
• Steering column adjustment/memory
• Consumer cut-off/sleep mode
ZKE - 2

DOOR LOCK ACTUATORS
The actuators are sealed, self contained units with no
replaceable parts. The door lock actuators use hall effect
sensors to provide:
• Door lock key position (driver’s door only),
• Door open/closed status.
The driver’s door lock provides the following signals to
the driver’s door switchblock module (PM-FT/SB):
• Lock / Unlock,
• DWA arm/disarm
• Convenience closing and opening signals.
DOOR LOCK POSITION HALL
SENSORS
The Drivers door switchblock
module monitors these key positions
over two wires. The signals are
generated by two hall effect sensors
(Hall Sensor 1 & 2) located in the
actuator.
When the key is turned, a plastic
cylinder in the lock actuator is
simultaneously rotated by the lock
tumbler extension rod.
A magnet is incorporated in the
plastic cylinder, which when rotated
changes the magnetic influence on
the hall sensors.
The presence of a magnet in close
proximity to the sensing surface of
either hall sensor creates a coded
input over the two wires that the GM
uses to determine the key position.
• Magnet in front of sensor, current flow through the sensor is <5 mA (0).
• Magnet rotated away from sensor, current flow through the sensor is >12 mA (1).
Hall sensor 1 & 2 are not included in the front passenger door or rear door actuators.
ZKE - 16
NEUTRAL
- 0 -
MANUAL
LOCK
HALL SENSOR 1
MANUAL
UNLOCK
• DOUBLE LOCK
 DWA ARMED
 CONVENIENCE
CLOSING (hold
until activated). UNLOCK
 DWA DISARMED
 CONVENIENCE
OPENING (hold
until activated).
HALL
SENSOR 2
TUMBLER
EXTENSION ROD
PLASTIC CYLINDER WITH ASYMMETRICAL MAGNET
(Shown in the Lock Position)

REMOTE RF (KEYLESS) ENTRY
The X5 keyless entry system’s operation is carried over from the E38/E39. However, the
FZV key has undergone considerable redesign.
• The remote key receiver is part of
the antenna amplifier and is
installed in the center of the top
section of the tailgate.
The receiver produces a digital
signal based on the transmitter
command and sends it to the GM
for processing.
The GM then carries out all remote
lock system, window/sunroof
convenience closing features and
DWA arming/disarming functions.
• The frequency at which the key transmits the radio signal to the antenna amplifier is 315
MHz.
• The system is also used to convey the key identification number being used to
lock/unlock the vehicle. This is a requirement of the Key Memory feature covered further
on in this manual.
GM III
ZKE - 23
GM III

MODEL YEAR 2000 FZV KEY
Visual Changes:
• New appearance with blue and white BMW roundel.
• New button arrangement (larger buttons) with sequential operation (enhanced operating
convenience)
• Rechargeable battery replaces replaceable batteries. Charged by EWS ring antenna.
• The key housing is encapsulated and can not be opened.
• The LED has been omitted.
• Key will be used in E46, E38 and E39 vehicles.
Features of the keyless entry system include:
• Up to 4 radio-control keys can be operated in conjunction with one vehicle.
• Locking/unlocking of doors, tailgate,
fuel filler lid.
• Selective unlocking of driver’s door (as
with key in lock)
• Arming/dis-arming of DWA alarm system
(if equipped).
• Remote unlocking of the tailgate only.
• Comfort opening of windows and
sunroof
• Interior lighting activation (search mode).
• Panic mode alarm activation..
• Automatic correction for up to 1000
erroneous activation signals.
• Low transmitter battery fault code
storage in the GM.
• An EEPROM is used to store the key
data.
• Keys delivered with a four color label
sheet containing four different colored
labels for each of the four possible FZV
keys.
ZKE - 24TAILGATE OPENS

Car Memory / Key Memory
The Car/Key Memory feature provides the flexibility of allowing the owner to customize cer-
tain functions of select vehicle systems and automatically identifies users of the vehicle by
a key identification signal provided by the remote keyless entry system (FZV).
Car & Key memory is marketed as a combined feature but is actually two separate func-
tions of the select vehicle control systems.
Car Memory: The owner is provided with a list of available system functions that can be
customized to their liking. Prior to delivery, the DIS or MoDiC is used to encode the
owner’s chosen selections into the appropriate control modules.
These choices become a permanent function of the control module and can only be
changed by re-encoding with the DIS or MoDiC at a BMW Center.
This feature has been available for some time via the ZCS Conversion Feature but has never
been fully utilized or officially presented to the vehicle owner as a feature of their vehicle.
Units DisplayChange (ºF/ ºC)
• DWA - Features
• FZV - Features
• Automatic Seat
Adjustment
• Method Selection
• Recirc
Air Memory
• Daytime Running
Lights
• Home Lights
UNLEADED GASOLINE ONLY01
220km/hMPH1/min
x1000
40 6080100120
140
160
180
200
220
240
1
023
4
5
6
75030
20
15
1220 406080
100
120
1401
1
MoDiC
20 PIN
DIAGNOSTIC
CONNECTION
MoDiC
D-BUS
DIS
A
SEAT
MODULE
GMV
IHKA
LSZ

ZKE - 28
LCM III
GM III

ZKE - 30
REQUIRED PRECONDITIONS:
Before configuring Car or Key Memory
Functions, connect a battery charger to the
vehicle. This will ensure adequate battery
voltage during the Car/Key Memory
configuration.
If battery voltage drops below 11.8 volts, the
procedure will terminate.
Car Memory Configuration procedure:
From the Coding/Programming Selection
function of the DIS or MoDiC, Select "CAR
MEMORY" and proceed by pressing the
right arrow.
The system will scan for control systems
capable of configuration based on the ZCS
in the Instrument Cluster.
After a short wait the system will display a list
of detected control systems capable of CAR
MEMORY configuration.
Using the owner's selection list, enter the
systems selected for customization.
Example:The owner chooses not to have
an acoustic acknowledgment when the
DWA is disarmed.
• From the displayed list select "Anti Theft
System" and press the continue arrow.
• From the Anti Theft Sub menu, select 4.
Acknowledge.
The Acknowledge sub menu provides all
possible options for the DWA
Acknowledgment.
• Select 2. Disarm Acoustically, and press
the continue arrow.

ZKE - 46
ANTI-THEFT (DWA) SYSTEM
The GM utilizes the following components to provide the DWA function:
• Door lock hall effect sensor contacts (door open/closed).
• Tailgate lid switch contact (monitored for closed tailgate).
• Hood switch (monitored for closed hood, located under the hood).
• DWA status LED (part of rear view mirror).
• Tilt sensor located in the electrical
carrier forward of the glove box (next
to GM)
• UIS Interior compartment monitoring
sensor (pre wiring in area of installa-
tion in center headliner).
• DWA siren (left cowl area next to mas-
ter cylinder).

HOOD CONTACT SWITCH
Located on the right side engine com-
partment, the hood contact switch pro-
vides a ground signal to the GM signifying
an open hood.
The plunger of this switch can be pulled
up past a detent causing the switch con-
tact to open. This feature can be used to
simulate a closed hood with the hood
open when diagnosing the DWA system.
DWA LED
The LED is provided with constant battery voltage (KL 30). The GM provides a switched
ground signal providing the various blinking signals used to convey DWA status to the vehi-
cle operator (covered further on).HOOD SWITCH
COMPONENTS
DOOR CONTACTS
As mentioned in the Central Locking Section, the door lock contact hall effect sensors pro-
vide status of door open/closed. The GM will activate the siren if a door open signal
becomes active when the DWA is armed.
TAILGATE SWITCH CONTACTS
The tailgate switch contact is located in the tailgate lock actuator assembly. When closed,
the tailgate contact provides a ground signal to the GM signifying a "closed tailgate". The
GM will activate the siren if the tailgate switch contact ground signal opens when the DWA
is armed.
ZKE - 47

ZKE - 48
TILT SENSOR
Located in the electrical carrier forward of the glove
box, the tilt sensor is an electronic sensing device with
the sole purpose of monitoring the vehicle's parked
angle when DWA is armed.
The sensor requires three signal wires to perform its function:
• KL 30 - Constant battery voltage
• Signal "STDWA"; switched ground input signal provided by the GM indicating DWA
armed/disarmed status. The tilt sensor is used as a splice location for the STDWA sig-
nal to the Siren and FIS interior protection sensor.
• Signal "NG"; switched ground output signal provided to the GM. The signal is used for
two purposes,
1. As a momentary acknowledgment that the tilt sensor received STDWA and is cur-
rently monitoring the vehicle angle.
2. If the tilt sensor detects a change in the vehicle's angle when DWA is armed, signal
NG is switched to inform the GM to activate the siren.
When the tilt sensor receives the STDWA signal from the GM it memorizes the vehicle's
parked angle. The angle of the vehicle is monitored by the solid state electronics. Once
armed, if the angle changes, the tilt sensor provides a switched ground signal to the GM to
activate DWA.