rear BMW X5 2004 E53 Central Body Electronics Workshop Manual

RADIO
UNLOADER
RELAY
ZKE - 5
An additional fuse panel is located
in an electrical carrier located at
the right rear of the cargo area.
The panel contains fuses 72 - 87.
The carrier also contains the
following relays
LOWER TAILGATE
ACTUATOR RELAY
REAR WINDOW
DEFROSTER
RELAY






  
 
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ZKE - 8
WINDSHIELD WASHING:
Pulling the Windshield Wiper Switch rearward closes the “wash” contact providing a
switched ground input to the GM. The GM activates the windshield washer pump directly
via a power output final stage transistor.
HEADLIGHT WASHING:
When the headlights are on, the headlight
washer pump is activated with the first
activation of the windshield washer pump.
The GM recognizes headlights on via K bus
signalling.
Within the same “on” cycle (ignition key has
not been switched off), it is only activated
again after five successive windshield washer
cycles.
The GM provides a ground on the headlight
washer relay control circuit providing pump
operation. The relay is located in the e-box.
The X5 uses three separate washer pumps
which are all easily accessible on the 5.3 liter
washer fluid reservoir located in the engine
compartment.
GM III
HEADLIGHT WASHER
RELAY
HEADLIGHT
WASHER
PUMP
WINDSHIELD
WASHER
PUMP
TAILGATE
WASHER
PUMP

REAR WINDOW WIPER/WASHER SYSTEM
The tailgate window wiper/washer system is included in the scope of ZKE however is not
controlled directly by the GM. The control electronics are integrated into the rear wiper
motor assembly. It contains two hall sensors, one for monitoring park position and other
for the end stop, or to signal reverse direction of the wiper motor.
The rear wiper system is operator controlled
through the wiper stalk switch providing the
following functions:
• Intermittent rear window wiping
• Programmed rear window wiping interval
• Operation of the rear window washer
Pressing the wiper stalk forward to the first
detent activates the rear wiper in the
intermittent mode.
The default timed interval is approximately 12 seconds. The full sweep and park positions
are recognized by the two hall sensors on the motor gear assembly. If the wiper is switched
OFF, the wiper blade will return to the park position.
The programmed wiper interval procedure is identical to the E39 sport wagon; Briefly
switch the rear wiper ON/OFF, Wait the desired interval time, Switch the rear wiper ON
again. The OFF time will be the programmed interval - up to approx. 30 seconds
Rear window washing is activated by pressing the wiper stalk switch to the full forward
position. The washer pump operates followed by two full wiping cycles. The wipers will then
switch to the intermittent wiping mode.
When the transmission is shifted into reverse, the wiper will switch to continuous operation
until the vehicle is shifted out of reverse. This high signal is provided by the LCM III when it
activates the back up lights.
ZKE - 9

OPTIONAL RAIN SENSOR (AIC)
The Windshield Wiping System will also be available with an optionally equipped Rain
Sensor. The Rain Sensor provides added driver convenience and enhances safety by
automatically activating the intermittent function of the windshield wipers when water
droplets are detected on the windshield.
COMPONENTS:
The rain sensor unit is mounted on the top center area of the interior windshield surface
directly behind the rear view mirror. The unit contains:
•Optical Prism Body:This portion of the unit is
permanently fixed to the windshield. It can not be
removed and can only be replaced with a
replacement windshield.
The prism body has a reflective surface that faces
the back of the windshield. The prism body also
acts as the windshield mount for the Rain Sensor
Control Module.
•Rain Sensor Control Module:The control module incorporates the following;
- Infra Red Emitter and Detector Diodes
- Optics heater (prevents condensation from forming on diodes and prism)
- Optics evaluation and control electronics
- Photo cell to detect night time driving
The control module requires four signals for operation; KL R, KL 31, Windshield Wiper
Motor Park Signal Feedback and K Bus interface.
ZKE - 10
GM III

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)

DOOR CONTACT HALL SENSOR
Also included in the driver’s door actuator is a third hall effect sensor. This sensor signals
the door open/closed status to the driver’s door switch block module and to the GM via the
P-bus.
The rotary latch plate position
activates the door contact hall
sensor.
• When the door latch is closed,
current flow through the sensor
is <5 mA (0).
• When the door is open, current
flow through the sensor is >12
mA (1).
The passenger side front door and
both rear door lock actuators only
include this hall effect sensor (hall
sensor 3). Hall sensors 1 & 2 are
not required.
ZKE - 17
PM-FT/SB

All door lock actuators and the fuel filler flap actuator are controlled directly by the GM via
four internal load relays. The drivers door lock actuator has a separate circuit for the
selective unlocking feature.
If this feature is disabled by key memory encoding, the driver’s door lock actuator selective
unlock circuit is activated simultaneously with the balance of the motors during unlock.
CONTROL DURING DOUBLE LOCK:
CONTROL DURING SINGLE LOCK:
SELECTIVE SINGLE LOCK
- CONTROL - SWITCHED POWER -
SINGLE LOCK CONTROL
- SWITCHED POWER -
GROUND
DOUBLE LOCK CONTROL
-SWITCHED POWER-
FUEL
FILLER
FLAP
LEFT
REAR
DOORRIGHT
REAR
DOORPASS.
DOORDRIVER’S
DOOR
SELECTIVE SINGLE UNLOCK
- SWITCHED GROUND -
SINGLE UNLOCK CONTROL
- SWITCHED GROUND -
UNLOCK CONTROL
- SWITCHED POWER -
DOUBLE LOCK CONTROL
-GROUND-
FUEL
FILLER
FLAP
LEFT
REAR
DOORRIGHT
REAR
DOORPASS.
DOORDRIVER’S
DOOR
SELECTIVE SINGLE LOCK
- CONTROL - SWITCHED POWER -
SINGLE LOCK CONTROL
- SWITCHED POWER -
GROUND
NOT ACTIVE
FUEL
FILLER
FLAP
LEFT
REAR
DOORRIGHT
REAR
DOORPASS.
DOORDRIVER’S
DOOR
ZKE - 19
CONTROL DURING SINGLE UNLOCK:

ZKE - 37
POWER WINDOWS
The power window operation on the E53 is similar to previous systems. Features of the
system include:
• Control of the front and rear door window motors is carried out directly by the GM.
• One-touch operation in both directions on all four windows.
• Cable type window regulator used for all windows.
• Anti-trap detection is provided by the pressure sensitive finger guard .
• Push/pull window switches
• The rear window switches located in the rear doors can be deactivated by the pressing
child lock out switch in the center console.
• Convenience closing/opening of the windows from the driver's lock cylinder or
convenience opening only from the FZV remote key (FZV operation can be owner
customized with the Car Memory Function).
• Window operation with the ignition switched off until a door is opened or 16 minutes has
elapsed after the key is switched off.
• Window load switching is through relays integral of the GM for rear windows and in the
respective door switchblock modules for the front windows. The current draw is
monitored for end limit position. The maximum run time for the window motors is limited
to 8 seconds. This allows the motors to be switched off if the end limit load sensing fails.

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 - 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).