1999 BMW X5 seat

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

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

Key Memory: This feature provides the added convenience of identifying users of the vehi-
cle whenever a lock or unlocked signal is generated via the individual FZV keys. A maxi-
mum of four FZV keys can be used with the Key Memory feature.
Each of the four keys generate a unique key identification signal (key number) that is trans-
mitted simultaneously with the lock/unlock signals to the General Module. Key Memory
does not respond to Lock/Unlock requests from the drivers door lock.
Mostof the key memory functions require the vehicle be configured using the “KEY MEM-
ORY” function of the DIS or MoDiC. However, there are a few features that store settings
automatically without configuration such as IHKA blower speed and temp setting.
The key ID signal alerts the GM V to communicate with select control systems over the K
Bus to store (when locked) or reset (when unlocked) certain driver adjustable settings.
There are features that function as both a Car & Key Memory feature.
Example; the Automatic Seat Adjustment feature is encoded as a Car Memory Function
with the following possibilities:
• when unlocking,
• when opening a door after unlocking
• or not active at all.
If active, the seat positions are stored and reactivated by the Key Memory function for indi-
vidual users of the car.
ZKE - 29

ZKE - 41
SUNROOF MOTOR/MODULE (SHD)
The combined motor module has a 13 pin
connector for interfacing the switch, and
vehicle harness (power ground and K bus.)
The motor contains two hall effect sensors
that monitor the motor shaft rotation
providing sunroof panel position.
The hall sensors also provide the end limit cut
out function for the SHD once the system is
initialized. The SHD counts the pulses and
cuts the motor out prior to the detected end
run of the sunroof panel.
INITIALIZATION
Initialization is required for the SHD to learn the end positions of the motor's travel. The hall
sensors provide pulses for motor rotation, the SHD counts the pulses and determines
where the panel is by memorizing the stored pulses.
If the system is not initialized, the sunroof will only operate in the tilt up and slide close
positions. Initialize as follows:
• Press and hold the sunroof switch in either the tilt up or slide close positions for 15
seconds.
• The sunroof motor operate momentarily signifying initialization acceptance.
The SHD memorizes the pulses from the hall sensors on the next activation of the motor
by driving the panel to its end run positions. The SHD senses an amperage increase and
determines the end run position. The counted number of pulses is then used as the basis
for calculating the panel position.
ANTI TRAP FEATURE
The anti-trap feature of the sunroof uses a hall sensor to detect obstructions while the
sunroof is closing (pulse frequency slowed down) in the automatic close function. The anti-
trap feature is shut down prior to full closing (4mm from full closed) to allow the sunroof the
seat into the seal.
Additionally, the anti-trap feature is not functional when the switch is held in the manual
close position.

ZKE - 43
INTERIOR LIGHTING
The GM controls the interior lighting automatically with the status change of several moni-
tored inputs. The lighting can also be manually controlled using the interior light switch.
COMPONENTS
DOOR CONTACTS: The door lock actuators contain a hall effect sensor for the purpose
of monitoring door open/closed status (hall sensor 3 in the driver's door actuator). The hall
effect sensor is located directly behind the rotary latch plate encased in the actuator. The
sensor is activated by the rotary latch plate's position. A change in current flow informs the
General module when a door is opened or closed.
Front seat interior/map light unit: The overhead
front seat interior/map light unit contains a single
main interior light. The light is controlled by the GM
automatically or by momentarily pressing interior
light switch located on the light assembly. The
switch provides a momentary ground signal that the
GM recognizes as a request to either turn the light
on (if off) or turn the light off (if on).
If the switch is held for more than 3 seconds, the GM interprets the continuous ground sig-
nal as a request to turn the interior light circuit off for the Workshop Mode as on previous
systems. The workshop mode is stored in memory and will not come back on even if the
GM is removed from it's power supply and reconnected. The switch must be pressed to
turn the lights back on.
There are two reading/map lights also located in the assembly. Each map light is mechan-
ically controlled by depressing it's corresponding on/off switch. The power supply for the
map lights is supplied by the GM through the Consumer Cut Off circuit.
Rear seat interior light unit:
In the center headliner is an additional interior/reading light unit. This unit contains an inte-
rior light that is controlled with the front interior light and a mechanically switched reading
light on the consumer cut off circuit.
Front footwell lights:
In each front footwell, there is also a courtesy light. These lights are only operated when
the GM provides power to the interior lighting circuit.

ZKE - 49
INTERIOR PROTECTION (UIS)
The UIS monitors the vehicle interior for motion through ultrasonic sound waves. The UIS
is a combined transmitter and receiver.
The X5 UIS sensor is incorporated into the
rear seat interior light trim cover. It is a two
piece unit with cable connection to the rear
transmitter/receiver.
The UIS and trim panel are clearly identified
with arrows indicating forward mounting
direction.
Due to the design of the vehicles interior,
the sensor is uni-directional and must be
installed in the proper direction to ensure
proper operation of the system (trim cover
ensures directional installation).
Every time the DWA system is armed (signal STDWA), the sensor adapts to what ever
objects might be stationary in the interior.
The sensor emits ultra sonic waves in a pro-
grammed timed cycle. It receives echos of
the emitted waves.
The UIS amplifies the received sound wave
signals and compares them with the trans-
mitted waves. The UIS also checks the
incoming echos for background hiss (wind
noise through a partially open window) and
adapts for this.
• If the echos are consistently similar, no movement is detected,
• If the echos are altered, (inconsistent), the UIS determines motion in the interior com-
partment.
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 activate siren signal (INRS) to the GM.
As with the tilt sensor, the UIS is also switched OFF when the vehicle is locked two times
within ten seconds. This allows the sensor to be switched OFF for transportation purpos-
es.

ZKE - 53
DRIVER’S SEAT MEMORY FUNCTION
As with previous systems, the seat memory feature of the SM stores three seat positions
for recall. The positions are stored in a non-volatile memory preventing loss of positions if
in case the SM or the battery is disconnected.
The additional buttons on the SM (M) pro-
vide activation of recording memory position
and (1-2-3) for storing or recalling a specific
seat setting.
Storing current seat position:
• Seat in desired position,
• Ignition switch in KL R,
• Press the M button until it illuminates
• Within 7 seconds press the 1,2 or 3 but-
ton to store.
The stored position can be recalled at any time by pressing the appropriate memory loca-
tion button (1-2-3).
MEMORY RECALL MODES OF OPERATION
Depending on current SM input signals via K-Bus, the memory recall operates in two dis-
tinctly different modes:
• One-touch mode (TTB),
• or press and hold mode of operation (DTB).
If the following input signal status is current, the SM resets the seat position by a momen-
tary“one touch”of the selected memory button.
• Ignition switch off with the driver’s door open, or,
• KL R on, door open or closed
If the following input signal status is current, the SM resets the seat position by a continu-
ous ”press and hold”of the selected memory button.
• Ignition switch off with the driver’s door closed
• KL 15 on, door open or closed.