SsangYong Korando III (2010 year). Service manual — part 467
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(10) Brake not working alert
The SKM sends the brake not working alert signal for 10 sec. every time the ignition status is changed
after the 1st cycle (OFF-ACC-IGN-ACC-OFF)
while the brake is not operated.
when the brake pedal is depressed, the system is reset and alert deactivation signal is sent.
when the 10 min. timer is terminated
-
-
(11) Smart key slot detection alert
The SKM sends the smart key slot detection alert signal for 10 sec. when a smart key inserted into
the slot is detected with IGN OFF and the driver's door open.
-
(12) SKM alert priority
1
Smart key out alarm
Outside
1
2
Smart key reminder alarm
Outside
3
Smart key verification failure alarm
Inside
2
4
Transponder verification fail alert
Inside
5
Smart key battery low voltage alert
Inside
6
Transmission position alert
Inside
7
SKM error alert
Inside
8
Brake alert
Inside
9
Clutch alert
Inside
10
Smart key slot reminder alarm
Inside
1
Warning deactivation conditions
▶
Warning transmission conditions
▶
Warning deactivation conditions
▶
when the smart key is removed, the alert deactivation signal is sent.
when the 10 min. timer is terminated
-
-
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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)
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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.
05-3
8010-01
1. SPECIFICATION
Pin No.
Specification
Rated voltage
DC 12.0 V
Operating voltage
DC 9 V ~ 16 V
CAN operating
voltage
DC 7 V ~ 18 V
Inspection voltage
DC 13.5 V
Operating
temperature
-30℃ ~ +80℃
Storage temperature
-40℃ ~ +85℃
Dark current
IGN OFF: 1 mA, 12 V
Measurement condition (at 25℃): 60 seconds after that ignition is
turned off and stabilized data get
IGN ON: Max. 2 A, 12 V
Measurement condition (at 25℃): during DTC check mode
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