Kia Picanto: Body Electrical System / Smart Key System
Specifications
Smart Key Unit
Items
|
Specification
|
Rated voltage
| DC 12 V
|
Operating voltage
| DC 9 - 16 V
|
Operating temperature
| -31 - 167°F (-35 - 75°C)
|
Load
| Max. 4mA (When welcome light function "OFF")
|
RF Receiver
Items
|
Specification
|
Frequency
| 433.92 Mhz
|
Antenna type
| FSK (Frequency Shift Keying)
|
Smart Key Fob
Items
|
Specification
|
Battery
| Lithium battery 3V 1EA
|
Distance
| - The distance over which RF(Radio Frequency) Receiver can receive a FOB transmission signal : 30m - The distance over which LF(Low Frequency) antenna(Outer Handle/ Trunk/ Tailgate) can detect FOB : 0.7m
|
Battery life
| More than 2 years (10 times / a day)
•
| An inappropriately disposed battery can be harmful to the environment and human health. |
•
| Dispose the battery according to your local law(s) or regulation. |
|
|
Push buttons
| 3 (Door lock / unlock, Tailgate)
|
Frequency(Rx)
| 125 kHz
|
Frequency(Tx)
| 433.92 MHz
|
Numbers
| 2EA
|
Antenna
Items
|
Specification
|
Rated voltage
| DC 12 V
|
Operating voltage
| DC 9 - 16 V
|
Operating temperature
| -22 - 167°F (-30 - 75°C)
|
Frequency
| 125kHz
|
Numbers
| Interior (2EA), Door (2EA), Bumper (1EA)
|
Components and components location
1. Smart key unit (SMK) 2. Interior antenna 1
| 3. Buzzer 4. Door outside handle / Door antenna
|
1. Interior antenna 2 2. Tailgate open switch
| 3. Bumper antenna
|
Description and operation
The
SMART KEY system is a system that allows the user to access and operate
a vehicle in a very convenient way. To access the vehicle, no
traditional key or remote control unit is needed.
The
user carries a SMART KEY FOB which does not require any conscious
actions by the user (e.g. operate a RKE button). The SMART KEY system is
triggered by pressing a push button in the door handle.
After
being triggered the vehicle sends out a request in a limited range. If
the SMART KEY FOB receives this request, it automatically sends a
response to the vehicle. Then the system decides whether to perform a
particular action (unlocking, locking…) or remain inactive.
Again, a communication between the vehicle and the SMART KEY FOB is needed before any actions will be performed.
The System offers the following features :
•
| Passive unlock via 4 doors |
•
| Passive locking via4 doors |
•
| Passive access tailgate via the tailgate lid switch at the tailgate |
•
| Max. 2 fobs can be handled by the system |
•
| Immobilizer backup antenna driver integrated into SSB for TP authentication (i.e. limp home mode) |
•
| Communication with engine management system |
1. | Passive unlock The system allows the user to access (unlock) the vehicle without performing any actions with the SMART KEY FOB. |
2. | Passive locking The system allows the user to lock the vehicle by pushing a button on door handle with the SMART KEY FOB. |
3. | Button start The
system allows the user to switch the power modes (Off, Accessory,
Ignition), as well as to start and stop the vehicle’s engine without
performing any actions with the SMART KEY FOB. See Button Engine Start
system specification. |
4. | LIMP HOME Mode Additionally,
the system offers so called “limp home mode”, which is the user can
operate all vehicle functions by pushing the key into the SSB. |
Smart Key ECU (SMK ECU)
The
SMK ECU manages all functions related to "Passive Unlock", "Passive
Lock" and "Passive Authorization for Engine Start Operation".
It
reads the inputs (Push button in door handle, Start Stop Button (SSB),
PARK position Switch), controls the outputs (e.g. exterior and interior
antennas), and communicates via the CAN as well as a single line
interface to further devices of the car.
For
communication with the SMART KEY FOB, SMK ECU generates a request
(challenge) as an encoded and modulated 125kHz signal at the inductive
antenna outputs and receives the SMART KEY FOB’s response via the
external RF receiver.
The main functional blocks of the SMK ECU are :
•
| Microcontroller with FLASH Memory |
•
| Single Line Interface to SRX |
•
| Single Line Interface to EMS |
•
| LF antenna amplifier/driver |
•
| CAN communication with BCM |
The LF antenna amplifier/driver generates a 125kHz sinusoidal carrier signal which is distributed to the different antennas.
Smart Key FOB
The system supports up to 2 SMART KEY FOBs.
The main functions of the SMART KEY FOB are :
•
| Passive functionality: receives LF-challenge and sends automatically RF response. |
•
| Classic RKE function by action up to 3 push buttons. |
•
| Transponder-functionality in case of a flat battery or a disturbed communication. |
Antennas
1. | Emitting LF Antennas : Inductive
antennas in and at the vehicle are used to transform the current,
driven by the SMK ECU antenna driver, into a 125 (or 134.2) kHz magnetic
field, which is the carrier for the SMART KEY challenge. Three
antennas cover the vehicle’s exterior: two antennas in the Door Handles
(DS and PS) cover the area around the doors; one antenna in the rear
bumper covers the area around the trunk or tailgate. Up to
three antennas cover the vehicle’s interior and the trunk or tailgate
interior: two in the passenger compartment and one in the trunk room or
trunk. |
2. | Bidirectional Immobilizer Antenna (for Limp Home): The
Immobilizer Backup Antenna is used for sending and receiving data: it
emits a magnetic field (125 - 135 kHz challenge) and receives changes in
the field strength (response of Transponder). |
3. | Receiver The SMART KEY FOB’s response is received via the RF receiver. |
Door Handle
The
front door handles of the two doors (driver door / passenger door) are
equipped with emitting LF-antennas to emit the 125kHz signals. The
front door handles are also equipped with a push button.
Push Button
The push button in door handle serves as a trigger to indicate the user’s intent to unlock or lock the vehicle.
The push buttons are installed at front doors, integrated into the door handles.
Another button is installed at the trunk or tailgate lid.
Passive Functions
The
system allows the user to access the vehicle without having to perform
any actions (e.g. RKE button pressing) with the SMART KEY FOB. It is
sufficient that a valid SMART KEY FOB is located within a defined and
limited range with respect to the vehicle. So the system is capable of
detecting and authenticating a SMART KEY FOB in the ranges as specified
below.
The
SMART KEY FOB receives and interprets a challenge sent from the vehicle
via the exterior antennas in a free space range of min. 0.7m measured
around the exterior antennas which are integrated in the door handles;
refer to the below given picture. The trunk or tailgate access range is
also min. 0.7m measured from the antenna position.
The
SMART KEY FOB receives and interprets a challenge sent from the vehicle
via the exterior antennas in a free space range of min. 0.7m measured
around the exterior antennas which are integrated in the door handles;
refer to the below given picture
Passive Access (Passive Entry)
Push
the door handle button when all doors locked indicates the operator’s
intent to access the vehicle and thus triggers the system for unlock
Passive Locking (Exit)
Pressing one of the push buttons in the door handles when one of the following condition is fulfilled:
•
| At least one door is unlocked and two_steps timer is not running or |
•
| Two_steps timer is running and one of the push button except Front Left side is triggered |
indicates the operator’s intent to lock the vehicle and thus triggers the system for a lock.
Passive tailgate Warning (Sedan only)
Whenever
the tailgate is closed, SMK ECU uses a suitable search strategy to
avoid tailgate buzzer warning by a fob outside the vehicle. Then SMK
searches for a SMART KEY FOB in the interior of the tailgate. If a valid
SMART KEY FOB is found in the tailgate, the SMK ECU activates SMK
external buzzer (TBD) to inform the user that the tailgate has been
closed with a fob inside the tailgate.
SMK
will send the tailgate open command to BCM for tailgate reopening if
tailgate reopening bit is set(BK)For this functionality, a “valid” SMART
KEY FOB means any SMART KEY FOB that belongs to the vehicle, even if
it’s DEACTIVATED.
•
| A
blind spot in the tailgate similar to any RF disturbance may lead to no
tailgate warning. Due to the penetration of the bumper antenna into the
tailgate area the lid may open without an Identification Device
outside. |
•
| A blind spot in the tailgate similar to any RF disturbance may lead to no tailgate warning |
|
Smart Key Reminder 1
1. | Preconditions : All
terminals OFF & at least one door open & locking status is not
locked checked by SMK periodically every 100ms, as long as CAN/LIN
active. |
2. | Event: At least 1 door knob status changed from unlock to lock. |
3. | SMK actions : •
| IF NO FOB-IN ACTIVE SMK
performs a search for the fobs in the interior of the vehicle. The same
LF-strategy has to be used as it is defined for the ID out warning
(registering only, no authentication |
•
| IF FOB-IN ACTIVE SMK search valid TP |
If no fob or no TP has been found, no action is required. If
any valid fob or valid TP has been found, SMK unlocks the vehicle by
sending a CAN Key Reminder unlock message with the fob number. If any valid fob has been found, SMK unlocks the vehicle by sending a CAN/LIN Key Reminder unlock message with the fob number. |
Smart Key Reminder 2
1. | Preconditions : All
terminals OFF & any door (including tailgate) open & no FOB-IN
& no locking status (checked by SMK periodically every 100ms, as
long as CAN/LIN active) |
2. | Vehicle action : Closing last door or tailgate with knobs locked state, or with a locking in progress |
3. | SMK actions : Before elapsing 500ms after the closing if all doors are locked then : •
| IF NO FOB-IN ACTIVE SMK performs a search for the fobs in the interior of the vehicle. The same LF-strategy has to be used as it is defined for the ID out warning (registering only, no authentication) |
•
| IF FOB-IN ACTIVE SMK search valid TP |
If no fob has been found, no action is required. If any valid fob or valid TP has been found, SMK sends unlock command via CAN and activates ext. buzzer warning. If any valid fob has been found, SMK sends unlock command via CAN/LIN and activates ext. buzzer warning. |
Smart Key Door Lock Warning
Door Lock Warning 1
1. | If
terminal state is ACC or IGN and all doors are closed and that user
triggers a SMK lock, a search is started at the exterior of the vehicle
from the side of the trigger. |
2. | If no valid Fob is found no action is required, but if a valid Fob is found then a Buzzer warning shall be started. |
3. | If
"tailgate Option == On" and "tailgate LockUnlockOption == On" are
fullfilled, Lock warning is including tailgate as a door and tailgate
lockunlock knob as a door unlock switch. |
Door Lock Warning 2
1. | If
terminal state is OFF and not all doors are closed and that user
triggers a SMK lock, a search is started at the exterior of the vehicle
from the side of the trigger. |
2. | If no valid Fob is found no action is required, but if a valid Fob is found then a Buzzer warning shall be started. |
3. | If
"tailgate Option == On" and "tailgate LockUnlockOption == On" are
fullfilled, Lock warning is including tailgate as a door and tailgate
lockunlock knob as a door unlock switch. |
Door Lock Warning 3
1. | If
terminal state is OFF and ATWS is considered as Disarmed and all doors
are closed and that user triggers a SMK lock, a search is started at
the Interior of the vehicle; |
2. | if
no valid Fob is found the search for SMK locking will be started, but
if a valid Fob is found then a Buzzer warning shall be started. |
3. | If
"tailgate Option == On" and "tailgate LockUnlockOption == On" are
fullfilled, Lock warning is including tailgate as a door and tailgate
lockunlock knob as a door unlock switch. |
Smartkey Lamp Warning
1. | If
terminal state is ACC or IGN and vehicle speed is less than 3km/h, a
periodic search (every 3s) is done at the interior of the vehicle to
check that the valid fob is still in the in the vehicle. |
2. | If no valid Fob is found a Warning is started, but if a valid Fob is found then no action is started. |
Failsafe Functions (Backup For Limp Home)
In case of a discharged battery of the SMART KEY FOB or disturbed transmission, the following functions are available:
•
| Unlocking / locking of doors or trunk (or tailgate depending of the vehicle configuration): use of mechanical key |
User Information Functions
1. | Preconditions : •
| (ACC or IGN1) & (any door open or tailgate open) |
|
2. | Event: The last opened door is closed |
3. | SMK action : SMK searches for a SMART KEY FOB in the interior. •
| If
no valid SMART KEY FOB is found, the SMK activates external buzzer and
also sends ID OUT warning via CAN (exterior buzzer warning and internal
buzzer warning). |
•
| If
a door is opened and closed again during terminals on and inside valid
fob, SMK re-enables the authentication and stops the warning. If the
terminal is in ACC, SMK shall turn on immobilizer lamp. |
|
•
| If
there is a LF error (LF overheating or LF antenna failure), the system
will have the same behavior as it is with no fob found. |
|
Fob Battery Low Voltage Detection
To
detect fob low battery condition, certain battery voltage measurement
and low voltage detection strategy are implemented into fob. The
measurement of the battery voltage will be done if fob button is pressed
or if a LF measurement command is received.
Learning Description
In this chapter, the learning procedure for SMK and FOBs is described.
For the learning of the SMK and FOBs, it's necessary to have a connection to the diagnostic tool.
Learning MODE
Whatever the mode, the learning procedures are managed by the SMK.
Prior to start learning service, Fob-In signal must be active and the vehicle secret code (called as PIN code) should be known.
Teaching MODE
This
mode is used by the dealers in order to replace SMK and/or the set of
keys, or to register additional keys for an existing system. That means
the system already has been learnt with certain PIN Code. The PIN Code
is fixed for the life time of the vehicle, therefore the same PIN Code
must be used in this mode. Otherwise learning will be failed
Teaching MODE Procedure Description (Step By Step)
Objective : Key teaching procedure at service station
Initial state :
–
| SMK replacement : SMK is not learnt and SMART FOB are already learnt with same PIN code |
–
| Additional or new keys teaching: SMK are already learnt with same PIN code |
Starting After Replacing (Virgin Start)
Starting is possible by following process after replacing new smart key unit, FOB key.
•
| It is for starting at virgin condition |
•
| All related parts are virgin condition (Smart key, ECM) |
•
| Press brake pedal in P or N range |
•
| Push the start button once with virgin smart key. |
Components and components location
Components
1. Driver side seat heater switch 2. Passenger side seat heater switch
Schematic diagrams
Circuit Diagram
Repair proce ...
Repair procedures
Smart Key
Smart Key Code Saving
1. Connect
the DLC cable of KDS/GDS to the data link connector (16 pins) in driver
side crash pad lower panel, turn the power on KDS/GDS.
...
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