2012 SSANGYONG KORANDO Service Manual

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24) Buzzer Control
Priority are as follows:With SKM ▶
Approach lamp ON 1.
When turning the ignition switch to OFF from ON position and opening the driver door, the
approach lamps come ON.
When receiving the UNLOCK signal from the smart key remote control or outside door handle
switch signal in the theft deterrent mode, the approach lamps come ON for 30 seconds.
When receiving the AUTO approach signal in the theft deterrent mode, the approach lamps
come ON for 30 seconds. -
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Approach lamp OFF 2.
When receiving the door lock signal from the smart key remote control or outside door handle
switch signal with the approach lamps ON, the lamps go OFF (reactivation of theft deterrent
mode).
When turning the ignition switch to ON position with the approach lamps ON, the lamps go OFF.
The approach lamps go OFF after 30 seconds. -
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2. IMMOBILIZER/REMOTE CONTROL KEY CODING
1) System Overview
While the communication between BCM/SKM and ECU is based on the CAN communication, the
communication between transponder and BCM/SKM is based on LF (Low frequency) and RF (Radio
frequency). When the ignition switch is turned to ON position, the BCM checks the verified transponder
according to the immobilizer verification procedure, if correct, allows the vehicle to start the engine. The
immobilizer indicator comes on during the communication and if the verification is carried out
successfully the indicator goes off.
If there is something wrong in the system, the indicator blinks.
2) System Layout

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3) Operation of Immobilizer
When the ignition switch is turned to the ON position with REKES key, the BCM checks the crypto code
of the inserted key using the immobilizer antenna and sends whether the engine is startable or not to the
engine ECU through the CAN communication so that the engine can be started.
BCM
REKES key
Immobilizer antenna
ECUCAN line
For the vehicle with the immobilizer, there can be a problem in starting the vehicle or the system error:
When two or more immobilizer keys come into contact with (each) other(s).
When the key is close to any device sending or receiving electromagnetic fields or waves other
than Ssangyong products.
When the key is close to any electronic or electric devices such as lighting equipment, security keys
or security cards.
When the key is close to a magnetic or metal object or a battery. -
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4) Components of REKES Key
Battery cover
Side & main cover Battery: CR2032TransponderKey plate Remote control PCB
How to replace battery ▶
Remove the battery cover using a flat screwdriver to replace the battery.
How to replace transponder ▶
Remove battery cover and battery
Remove rubber cover and screw then remove key plate
Remove side cover and main cover
Replace transponder -
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Do not drop or shock to the transponder in the key as it may be damaged.
With a damaged transponder, the engine cannot be started.
When you erase the code or register an extra key, please attend on the site.
In any cases, the immobilizer system can not 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. -
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1. SPECIFICATIONS
Item Specification
Rated voltage DC 12 V
Operating voltage DC 6.0V ~ 16.0V
DC 6.0V ~ 18.0V(CAN)
Operation temperature -30°C to +80°C
Modulation method FSK
Dark current 5.5 mA + Auto A/P (12 mA)
Maximum humidity 95%
Range 10 m or more (OPEN SITE)
Voltage drop 1.0 V or less
Receive frequency433.920±0.015 MHz(EU)
315,000±0.015 MHz(GER)
Bandwidth15 KHz ± 2 KHz or less

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1. SYSTEM LAYOUT
The vehicles with smart key system are equipped with the SKM (Smart Key Module) unit. The SKM,
which does not use the traditional key or remote controller to access the vehicle, provides 3 functions.
The passive UNLOCK function unlocks the door after confirming the smart key information and the
driver's door conditions when the driver carrying a smart key touches the door handle. The passive
START function starts the engine when the START switch is pressed by the driver sitting on the driver's
seat. The passive LOCK function locks the door when the door handle switch is pressed by the driver
after exiting the vehicle.
Buzzer
Start switch
SKM unit
Outside door handle
switch and antenna

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Slot
Rear bumper antenna
Front interior antennaRear interior antenna
Smart key

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2. INPUT/OUTPUT DIAGRAM
Major functions ▶
Passive LOCK/UNLOCK by outside door handle switch
Passive UNLOCK by tailgate open switch
Passive START by START switch
Engine ECU and High speed CAN communication
BCM, Instrument cluster and Low speed CAN communication
RF communication for REKES operation
Smart key system warning function
Smart key registration (up to 3 keys) 1.2.
3.4.
5.6.
7.8.