instrument cluster BMW X5 2001 E53 Central Body Electronics Workshop Manual

FZV KEY RECHARGEABLE BATTERY
From KL R, the battery inside the key head is charged inductively by the EWS ring antenna
via a coil antenna integrated in the key. The charging process is controlled by electronic
circuitry integrated in the key.
• The service life of a radio-control key used under normal conditions corresponds to the
vehicle lifespan.
• If the FZV keys are not used (ie: stored in a drawer), the battery will be discharged after
approx. 1.5 years.
• The time required to fully charge a discharged battery is approx. 30 hours.
• The remote control can be operated about 15 times after a charging period of approx.
30 minutes (driving time).
The key data is stored in a transponder chip. The transponder chip is a wireless read and
write EEPROM. It is powered via the ring coil at the steering lock. Power is applied
electromagnetically when the key is in the ignition switch from KL R.
The power supply is used both for data transfer as well as for charging the battery. This has
been made possible by new development of the transponder chip.
As with previous systems, every press of an FZV key also provides the battery charge
condition. When the FZV electronics receives a low power condition message three
successive times, the GM sets a fault indicating a low battery within a specific key. The
LCM is also informed via the bus system and alerts the driver via an instrument cluster
matrix message.
If the battery is recharged (used operate car), the fault will be automatically deleted when
five successive messages are received indicating a charged battery condition.
The battery has no affect on the EWS III communication function!
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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.

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CAR/KEY CONFIGURATION AND THE ZCS CODING CONVERSION FEATURE
The ZCS Coding Conversion feature is still utilized for changing other system functions as
in the past. For example: The Language Display Change for the instrument cluster display
block is only available using the Coding Conversion feature.
CAR/KEY MEMORY SERVICE CONSIDERATIONS
Replacing Car or Key Memory Configured Control Modules:
If a Car/Key Memory capable control module becomes defective and needs replacement,
the specific customized data will be transferred over to the new replacement unit during the
ZCS encoding process.
If this is not possible due to extensive control module failure, the owner must be made
aware of the situation and requested to provide the options they originally selected. For this
reason, it is advantageous to print the selected features as mentioned in the CAR & KEY
MEMORY configuration procedures.
FZV Key Initialization Procedure:
Also mentioned in the FZV section of this manual, If FZV keys need re-initializing, make sure
they are initialized in the same order. Adhere to the colored label identification system for
proper key initialization sequencing.
Technician Awareness:
Car Memory/Key Memory Configuration obviously changes the functionality of the systems.
Before concluding a specific system is defective, review the Car/Key memory selection for
the vehicle you are working on. There may be an owner selected function activated that is
not a common selection, causing misunderstanding of the system's function.
When working on a Car/Key Memory capable vehicle, avoid using the FZV keys. Use the
driver’s door lock to lock and unlock the vehicle to maintain the owners memorized settings.
If settings had to be modified as part of repair procedure, inform service advisor of situation
to convey to vehicle owner.

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DRIVER’S SEAT MEMORY (CAR Memory Influence)
The PM-SM can be encoded to recall a specific seat position for a vehicle user when the
GM signals the SM to automatically recall stored positions separate of the 1-2-3 button
selections.
This feature is encoded through the car memory function and activated by the key memo-
ry function. The PM-SM will monitor the seat position and store it in another area of it's
memory when the vehicle is locked with the remote keyless entry system. The GM sends
a request to memorize the seat position and store it for FZV key user 1,2,3 or 4.
If another user of the vehicle changes the seat position the PM-SM restores the memory
position the next time the specific key is used to unlock the vehicle.
This feature can be further modified to activate the position recall based on the owner's
selected activation scenario, for example: The owner can choose to :
• Disable this feature,
• Initiate memory recall when the unlock signal is initially sent before a door is opened.
• Initiate memory recall when the unlock signal is sent but only when the driver's door is
opened.
See Car Memory Key Memory for additional information.
POWER SEAT DIAGNOSIS
The PM-SM communicates with the DIS or MoDiC via the K bus - instrument cluster gate-
way - to the P-bus. The PM-SM monitors the seat motors and circuits as well as it's inter-
nal operation. Any detected faults are stored in the PM-SM fault memory and are called up
when diagnosing the system with the Fault Symptom diagnostic plan.
The PM-SM also provides status display to the DIS of its input and output control signals
as well as component activation.

DIAGNOSIS/TROUBLESHOOTING
The GM III contains an EEPROM fault memory. Faults that occur with any of the sub-sys-
tems of the ZKE are stored in the GM III. Diagnosis and troubleshooting is carried out with
the DIS tester. The diagnostic link is through the IKE or Instrument cluster over the K bus
to the GM.
Additional sub-fault memories are incorporated in all of the peripheral modules. The infor-
mation stored in these location is used to pin point defective components.
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