2013 SSANGYONG KORANDO immobilizer

When deleting the old code of the transponder registering an extra ignition key, please attend on
the site and observe the process personally.
In any cases, the immobilizer system cannot be removed from the vehicle. If you attempt to remove
it and damage the system, starting will be impossible. So never attempt to remove, damage or
modify it.
The remote engine starter cannot be installed to the vehicle equipped with the immobilizer system.
Do not drop the key or subject it to impact the key, as it may damage the transponder inside the
key.
The engine cannot be started using a key with damaged transponder.
In the following cases, you may experience starting problem or a system error can occur. 1.
2.
3.
4.
5.
6.
5) Cautions for immobilizer
When two or more ignition keys come into contact with (each) other(s), or the key is close to any
device that sends/receives electromagnetic fields or waves.
When the ignition key is close to any electromagnetic device, such as lighting equipment, security
keys or security cards.
When the key is close to a magnetic, metal object, or battery. -
-
-

8712-03
7. SMART KEY VERIFICATION TIME CONTROL
The smart key verification time control consists of pre-verification timer and immobilizer verification timer,
and no verification process is required for 30 seconds after the each verification process has been
completed.
Pre-verification timer: Time for performing start & power mode function that controls the vehicle
power.
Immobilizer verification timer: Time for which the start with a smart key is possible after the SKM and
EMS (ECU) verify the immobilizer. -
-
Item Pre-verification timer Immobilizer verification timer
Operating power
Power OFF, ACC, IGN ON IGN ON after pre-verification (ACC)
FunctionTime for which the power control can be
carried out under the verified conditions
(30 seconds after the verification)Time for which the start request can be
carried out without a smart key under the
verified conditions
(30 seconds after the verification)
Input conditions
Verification
conditionsSmart key searching completed after the
following conditions are met:
Close signal input after any door
opened
Brake switch signal input
START/STOP switch signal input
After emergency slot inserted
After IGN OFF 1.
2.
3.
4.
5.Power changed to IGN ON after
valid pre-verification
Power changed to IGN ON by
smart key verification after pre-
verification timer completed
Smart key verification succeeded
by brake switch input after
immobilizer verification timer
completed with IGN ON
Smart key verification succeeded
after immobilizer verification timer
completed with IGN ON,
immobilizer verification and brake
switch input 1.
2.
3.
4. All doors closed
(including tailgate)
START/STOP switch input
Brake switch signal input
Smart key inserted into emergency
slot
Smart key searching completed
Engine start ON to OFF 1.
2.
3.
4.
5.
6.Brake switch signal input
START/STOP switch input 1.
2.

Component Pre-verification timer Immobilizer verification timer
Deactivation
conditions
If any condition for pre-verification timer and immobilizer verification timer is met, no verification process
is required for 30 seconds after the each verification process has been completed.
Operation before pre-verification timer
Passive LOCK/UNLOCK
REKES LOCK/UNLOCK -
-
Ignition status after immobilizer verification
The immobilizer verification has been completed when the engine starts.
The immobilizer verification is not deactivated until the ignition is turned to ON, OFF or ACC
ON.
The immobilizer is not deactivated when the key out warning condition is met while the engine
is running. -
-
-
8. START & POWER MODE CONTROL
The ignition status is changed to OFF, ACC ON, IGN ON and engine cranking by one START/STOP
switch.30 seconds has been passed after
the immobilizer verification timer
IGN1 OFF
No smart key is found inside the
vehicle with all doors closed after any
door has been opened and then
closed. 1.
2.
3. 30 seconds has been passed after
the pre-verification timer
Door handle switch ON
IGN ON
Theft deterrent mode
activation/deactivation
Door status changed (open/closed) 1.
2.
3.
4.
5.

Engine starting
When the START/STOP button is pressed with the brake pedal applied and gear selector lever in P or
N position, the SKM performs the immobilizer verification and sends the engine START request signal
to the EMS if a normal coded smart key is found.
When the .engine start request signal from the START/STOP switch is received, the SKM sends the
start request signal through the P-CAN and the vehicle power status signal to the BCM through the B-
CAN.
The SKM cuts the power for IGN2 and ACC relays while the engine is cranking as cutting the electric
load is necessary.
The SKM receives the engine start status signal from the EMS (ECU) through the P-CAN. 1.
2.
3.
4.
EMS (ECU)Engine rpm, engine cranking/stop/running/loaded
TCUGear selector lever position: P, N
ABS/ESPVehicle speed signal (wheel speed sensor on each wheel)
The SKM turns on the ACC/IGN2 relays after the engine cranking and sends the signal for IGN after
starting to the BCM through the B-CAN.
When the START/STOP button is pressed and engine cranking request1 signal is sent, the EMS
(ECU) cranks the engine after checking the engine warming up. If the engine cranking request2
signal is sent, the EMS cranks the engine without checking the engine warming up. 5.
6.
Engine cranking request1
(engine start after
warming up)When the START/STOP button is pressed briefly under the start
conditions, the vehicle starts to warming up and then the engine is started
after a certain amount of time (warming up indicator ON to OFF).
Engine cranking request2
(engine start without
warming up)When the START/STOP switch is pressed once again while the engine
cranking request1 signal is sent, the engine is started (regardless of
warming up indicator)
It can be delayed by several seconds according to the engine
coolant temperature.
Starting engine while driving 7.
The engine start request signal is sent when the START/STOP switch is pressed, provided that the
vehicle speed is less than 10 Km/h or no vehicle speed signal is input, the gear selector lever is in
N position and the brake switch is ON with IGN ON (30 sec. verification is not required).
The engine start request signal is sent regardless of the brake signal when the START/STOP
switch is pressed, provided that the vehicle speed is 10 Km/h or more and the gear selector lever is
in N position with IGN ON (30 sec. verification is not required). -
-

8712-03
(4) Smart key battery discharge warning (3) Smart key verification fail warning
When the verification is requested for ignition status change or engine starting and no verified smart key
is in the vehicle, the SKM sends the "smart key verification status" signal, which indicates that the
verification has failed, for up to 10 sec. until the verification fail conditions are deactivated. for up to 10
seconds. until the verification fail conditions are deactivated.
Verification fail detection and transmission conditions
When the ignition status is changed after a smart key is verified by the START/STOP switch ON
input, the SKM sends the verification status for 10 sec. -Normally, the smart key verification warning is one of the smart key fail conditions. -
Ignition status change
(OFF -> ACC) / (OFF -> IGN)/(ACC -> IGN) / (IGN -> engine ON) *
If above conditions are met again, the SKM re-verifies a smart key and sends the verification status
for another 10 seconds.
When the ignition status is changed by the transponder verification while the smart key status is sent
through the B-CAN, the SKM sends the smart key verification signal and also sends the transponder
verification signal for 10 seconds. -
-
If low smart key battery is detected during the verification process for ignition status change or engine
start, the SKM sends the signal for "smart key battery low voltage warning" to the BCM and instrument
cluster through the B-CAN for up to 10 sec. until the warning condition is deactivated.
Smart key battery discharge confirmation and deactivation
If the smart key battery low voltage is confirmed, the SKM sends the smart key battery low voltage
warning signal.
If the smart key battery is in normal condition, the SKM sends the smart key battery low voltage
warning deactivation signal.
The smart key is the last used key. -
-
*
(5) Transponder verification fail warning
If a verified smart key is not found by the key verification process, the SKM sends the information that
indicates the key is not verified to the instrument cluster through the B-CAN for up to 10 seconds until
the warning condition is deactivated.
The SKM sends the transponder verification warning when the verification has failed with the smart
key inserted into the immobilizer holder. -
Transponder verification fail detection and transmission conditions
When the ignition status is changed after the transponder is verified by the START/STOP switch ON
input, the SKM sends the transponder verification status for 10 sec. -

8712-03
Start motor
12. SKM IMMOBILIZER SYSTEM
1) System Description
The immobilizer system prevents the vehicle theft by allowing only the authorized key to start the engine.
The transponder inside the key communicates with the SKM (immobilizer slot) and EMS (ECU) through
P-CAN communication, and the system permits the engine to start after confirming the encrypted
coding.
When the START/STOP switch is pressed with the smart key inserted into the immobilizer slot because
of the smart key battery discharge, the SKM communicates with the EMS (ECU) through P-CAN, and
the ECU starts to control the engine only the signal is valid.
A valid key verification time is provided for 10 seconds and the engine can be started during this time. If
pressing the START/STOP switch again after this 10 seconds, the key verification process is performed
again.
2) Configuration
Emergency slot
Smart key
SKM
EMS (ECU)

3) Operating Process
Key verification can be divided into two types, immobilizer key verification and smart key verification. The
immobilizer verification is applied for the SKM system, and verifies the transponder built in the smart key.
When the smart key is inserted into the slot, the verification is carried out, overriding the RF signal from
the smart key.
The power is supplied to the slot when the START/STOP switch is pressed with the smart key inserted
into the slot, and the smart key transponder verification is carried out by the transponder communication.
Once the key is verified, a valid key verification time is provided for 10 seconds and the engine can be
started by pressing the START/STOP switch during this time. If pressing the START/STOP switch after
this 10 seconds, the key verification process is performed again.
When the ignition is turned ON, the EMS (ECU) sends the challenge message to the SKM through
the P-CAN. (This is to verify whether the transponder of the smart key is valid. If the verification fails,
it transmits the re-verification signals 3 times for 2 seconds. If 3rd re-verification fails, the verification
is deactivated for 10 seconds and re-activated after that.)
The immobilizer slot of the SKM system sends the encrypted cod to the transponder, and the
transponder re-sends the encrypted code to the immobilizer slot.
The encrypted sent to the immobilizer slot is re-sent to the SKM.
The SKM compares this code with the encrypted code randomly transmitted by the internal logic.
(System compares the signal from transponder and encrypted signal from the immobilizer control
unit)
Only when the two signals are identical, it recognizes the key as the verified one and transmits the
positive message to the ECU.
The ECU enables the engine to be started. 1.
2.
3.
4.
5.
6.

Indicator
(amber)
Brake warning lamp (brake fluid)
ABS warning lamp
Passenger air bag disable indicator
Indicator
(red)
Indicator
(amber)
Indicator
(red)
EPS
Indicator
(amber)
Immobilizer indicator
This indicator comes on when the passenger air bag OFF switch is operated.
This indicator comes on the immobilizer (transponder) is not certified. This lamp comes on when the parking brake is applied or the brake fluid
is insufficient.
If this lamp doesn't go off after the parking brake is released, check the
brake fluid level first and then fluid leakage. -
-
This warning light comes on when the ignition switch is turned to ON
and should go out if the system is normal -
This indicator comes on when the EPS system is faulty.