2012 SSANGYONG RODIUS key

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3. CIRCUIT DIAGRAM
▶ Tail lamp, key reminder SW, chime bell

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REKES Key
Immobilizer Unit
Diagnostic Connector
1. SYSTEM LAYOUT
1) Location
Immobilizer Warning Lamp
ECU

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2. OVERVIEW
The Immobilizer System provides an additional theft deterrent to the vehicle in which it is installed
and prevents it from being started by unauthorized persons. The transponder integrated in the key
and the engine control unit have the same code. When the ignition key with the integrated
transponder is turned to the ON position, the ECU (Engine Control Unit) checks the crypto code
of the key and, if correct, allows the vehicle to start the engine. If the verification has been failed,
the engine cannot be started and the immobilizer warning lamp blinks.
Immobilizer unit

03-6
Transponder
3. VERIFICATION OF KEY
1) Verification
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 immobilizer installed in the key
box, and the system permits the engine to start after confirming the encrypted coding from the
engine ECU.
In the following cases, a driver may be unable to start the vehicle with the immobilizer.The immobilizer unit transmits
the encrypted code to the
transponder. (2)
The transponder sends an encrypted signal to the unit as a response.
The transmitted code is changed to an encrypted signal in the unit.
The system compares the signal from transponder and the encrypted signal in immobilizer unit. (3)
(4)
(5)
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.
When the key is close to any electronic or electric devices such as lightening equipment,
security keys or security cards.
When the key is close to a magnetic or metal object or a battery. -
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Immobilizer Unit

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ECU
Immobilizer Indicator and Warning Lamp ▶
This indicator comes on when the ignition
key is communicating with the engine
control unit (during engine starting) and
goes out after starting the engine.
When turning the ignition key to ON
position, the ECU transmits the challenge
message to the immobilizer unit to verify
whether the key is valid. (1)
Only when the two signals are identical, it
recognizes the key as the authorized one and
transmits the positive message to the ECU.
The ECU allows the engine to be started. (6)
(7)
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, let the owner attend on the site.
In any case, 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 on the vehicle equipped with the immobilizer
system. -
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-Lamp ON: in communication
Blinking twice for one second: immobilize
r
system failure
Blinking once for two seconds: immobiliz
e
unit is not coded
The immobilizer indicator does not
come on if the communication time
between immobilizer key and ECU is
too short.
Immobilizer Indicator and Warning Lamp

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▶ Rain sensing operation point
The wiper relay is turned on and the wiper motor runs one cycle when the ignition key is
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4700900095004702c80068007c007b007602c9004700970096>sition).
The wiper relay (LO) is turned on and the wiper motor runs one cycle when changing the
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90009b009000960095009a0047004f009e008f00900093008c> the ignition key is in “ON”
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7602c9004700970096009a0090009b00900096009500470088>gain from other positions, the
system drives the wiper relay (LO) to run the wiper motor one cycle only when the rain sensor
detects the “Rain Detected” signal. 1)
2)

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The wiper system continuously outputs the parking signal of current sensitivity when the
parking terminal is grounded (while the ignition key is in “ON” position and the wiper switch is
in “AUTO” position). 1)
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When the parking terminal is fixed to IGN (HIGH), the wiper system outputs the operating
signal of current sensitivity for 2 seconds, then continuously outputs the parking signal of
current sensitivity. 2)
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▶ Wiper operation when the wiper parking terminal is grounded

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The wiper relay (LO) is turned on and the wiper motor runs one cycle when the wiper
sensitivity is changed to 3 from 4 during receiving the malfunction signal (2) from the rain
sensor (while the ignition key is in “ON” position and the wiper switch is in “AUTO” position). 2)
The wiper relay (LO) is turned on and the wiper motor runs one cycle when the wiper sensitivity
is changed to 2 from 1 during receiving the malfunction signal (3) from the rain sensor (while
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47009a009e0090009b008a008f00470090009a004700900095> “AUTO” position). Also, the wiper
relay (LO) is turned on and the wiper motor runs one cycle when the wiper sensitivity is
changed to 2 from 1 during receiving the ground fixed or IGN fixed signal from the rain sensor. 3)