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Annex No.5
Functional Description
User Manual
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SIEMENS VDO Automotive AG SV C BC P2 RF TG
FCC ID:KR55WK48952 IC:267T-5WK48952
Functional Description /
User Manual
of the
Siemens VDO
Keyless Vehicle Module
type 5WK4 8952
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SIEMENS VDO Automotive AG SV C BC P2 RF TG
FCC ID:KR55WK48952 IC:267T-5WK48952
Functional Description
1. General functional description
This short system description gives an overview about the functionality of the Keyless
Vehicle (KV) system and from the Keyless Vehicle Module (KVM).
The vehicle and the Passive Key (PK) will communicate via challenge / response.
By any request the KVM sends a challenge via the respective Low Frequency (LF)
antennas with 125 kHz to the Passive Key. The PK’s within the detection range a nswer with the identification code via Radio Frequency (RF) transmission. The
external RF Receiver sends the data from the received signal via serial link to the
KVM.
2. Passive entry, passive exit
2.1 Unlocking
With a valid PK within the outside detection range of the vehicle, the customer will be
able to open each door of the passenger compartment and the tailgate.
Woken up by pulling a door handle the KVM sends a challenge 125 kHz via the corresponding inductive door handle antenna to the Passive Key. After receiving the
challenge data the Passive Key sends the response data via RF to the external receiver. If the identification code received is valid the KVM sends the unlock request
command via CAN-Bus to the Passenger Junction Box (PJB).
2.2 Locking
To lock the vehicle, the customer has to push the Lock Button mounted in any door
handle once and a valid PK has to be detected within the respective door handle detection range.
3. Passive start/stop
The KV system will provide an inside detection range, which will cover the passenger
compartment.
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SIEMENS VDO Automotive AG SV C BC P2 RF TG
FCC ID:KR55WK48952 IC:267T-5WK48952
3.1 Engine Start / Unlock of Steering Column
The starting action will be handled via a rotating Ignition Switch, which provides ignition off, accessory, ignition on and crank position.
With a valid Passive Key within the interior detection range, the customer will be able
to start the engine after pushing the brake (automatic transmission) or pushing the
clutch pedal (manual transmission). After detection of a valid Passive Key the KVM
sends the release command to the Smart Steering Column Device (SSCD) via which
fulfills a mechanical release and permits the customer to rotate the Ignition Switch to
any position (ACC, Run, Start). Without detection of a valid PK, the Ignition Switch
and the steering column remains locked.
The Engine Control Unit receives authorization to start engine from the KVM via
CAN-Bus from the Cluster module.
3.2 Engine Stop / Lock of Steering Column
For Engine Stop the Ignition Switch must be rotated to ACC position.
4. Block diagram Keyless Vehicle Module
Kl. 31
FL clutch
FR clutch
RL clutch
RR clutch
Clutch
Tailgate
FL lock
FR lock
RL lock
RR lock
FL unlock
FR unlock
RL unlock
RR unlock
ctor
T.gate Lock GlassR
KeyIn_Start
Brake
KVM Conne
CAN High
MS C AN
TJA1040
CAN Low
SRx_
Serial
Interface
Polled
Wake up
KVM
Inputs
SRx
FL clutch
FR clutch
RL clutch
RR clutch
Clutch
Tailgate
FL lock
FR lock
RL lock
RR lock
FL unlock
FR unlock
RL unlock
RR unlock
KeyIn_Start
Brake
EN_CAN
CAN TxD
CAN RxD
TxD RF
RxD RF
Microcontroller
CAN 2.0
SCI
Kl.30
Measurement
Quarz 16 MHz
internal
Watchdog
MC9S12B128
Polling
Power_On_LF
Power_LF, Power_on_LF
2MHz_Takt
Power 2, Power 1,Power0,
Power M1,Power M2,Power M3
TxD_To_LF_Stage
Ant_Diag1,Ant_Diag2
Ant_Diag3
Ex_Tr, Int_Tr,
Int1&2,
Left_A,Right_A
FL_Latch+, FL_LatchFR_Latch+, FR_LatchRL_Latch+, RL_LatchRR_Latch+, RR_Latch-
Power Supply
Stabilisation,
reverse
voltage
protection
Voltage
Regulator
Vcc
AD_Temperatur
Biterror
AD_Ant1, AD_Ant2
limitation
+12V
switched
Vcc
switched
Step up
regulator
LF-Stage
Antenna
Diagnostic
Antenna
Relay Matrix
Release Motor
Latches
Relay
Matrix
Kl. 30
+12V_L
+16V
+12V_Ges
ch
VCCS
VCC
+20V
-7V
Ext_Trunk1_Ant +&-
Int_Trunk1_Ant +&-
Interior_Ant1 +&-
Interior_Ant3 +&-
FL_Door_Ant +&-
FR_Door_Ant +&-
RL_Door_Ant +&-
RR_Door_Ant +&-
FL_RM_Latch+
FL_RM_Latch-
FL_RM_Latch+
FL_RM_Latch-
FL_RM_Latch+
FL_RM_Latch-
FL_RM_Latch+
FL_RM_Latch-
KVM Connector
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SIEMENS VDO Automotive AG SV C BC P2 RF TG
FCC ID:KR55WK48952 IC:267T-5WK48952
5. List of variants
5WK48952 Keyless Vehicle Module (ECU)
5WK47894 LF antenna V3
5WK47893 LF antenna V2(housing variant)
5WK47891 LF antenna F2 (housing variant)
5WK47895 LF antenna V1 (housing variant)
6. Technical Data
Carrier frequency: 125 kHz +/- 1 kHz
Field strength: < 42 dBµA/m @ 10 m
Modulation: ASK
Supply voltage: 13 V
Battery type Car battery
Range: < 2 m
7. Typical Usage Pattern (for Europe only)
20 actuations of access control system within 24 hours with a typical transmission
time of 0.07 seconds / hour.
Transmission time T
Off time T
Duty Cycle: T
OFF
/ T
ON
0.07 seconds / hours
ON
3599.93 seconds / hours
(ON+OFF)
x 100% = 0.07 / 3.600 x 100 % = 0.02 %
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SIEMENS VDO Automotive AG SV C BC P2 RF TG
FCC ID:KR55WK48952 IC:267T-5WK48952
8. Label Design
Europe:
Siemens VDO
5WK4 8952
USA/CAN:
Siemens VDO
5WK48952
FCC ID:KR55WK48952
IC:267T-5WK48952
NOTE:
Changes or modifications not expressly approved by the manufacturer could void the user's
authority to operate the equipment.
This device complies with part 15 of the
FCC Rules and RSS-210. Operation is
subject to the following two conditions: (1)
This device may not cause harmful interference, and (2) this device must accept
interference received, including interference that may cause undesired operation.
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