immobilizer SSANGYONG RODIUS 2012 Service Manual

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7. CODING AND INITIALIZATION
1) Engine Variant Coding
Unit Selection Description
PTC auxiliary heater NO For PTC auxiliary heaterequipped
vehicle, select"YES".
YES
Glow plug Relay (K-line) Select "AQGS".
AQGS (CAN)
Transmission MT 5-speed Select the appropriate system.
MT 6-speed
AT 5-speed (DC 5AT)
AT 6-speed (DSI 6AT)
AT 7-speed (DC 7AT)
Pressure sensor
forA/C refrigerantNOSelect “Refrigerant pressure sensor”.
Refrigerant Pressure Sensor
Immobilizer NO Select "YES" if the vehicle has
immobilizer.
YES
Vehicle speed input
typeCAN Select "CAN" if the vehicle has ABS or
ESP
WIRE
Cooling fan Relay Select "PWM".
PWM
Auto cruise NO Select "YES" if the vehicle hascruise
control.
YES
Engine level control NO Select "NO".
YES
G-sensor NOABS: Select “NO”.
4WD ABS or ESP: Select “YES”.
YES
SMART key NO Select "NO".
YES

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2) ECU Control
(1) Function
a. ECU Function
ECU receives and analyzes signals from various sensors and then modifies those signals into
permissible voltage levels and analyzes to control respective actuators.
ECU microprocessor calculates injection period and injection timing proper for engine piston speed and
crankshaft angle based on input data and stored specific map to control the engine power and emission
gas.
Output signal of the ECU microprocessor drives pressure control valve to control the rail pressure and
activates injector solenoid valve to control the fuel injection period and injection timing; so controls
various actuators in response to engine changes. Auxiliary function of ECU has adopted to reduce
emission gas, improve fuel economy and enhance safety, comforts and conveniences. For example,
there are EGR, booster pressure control, autocruise (export only) and immobilizer and adopted CAN
communication to exchange data among electrical systems (automatic T/M and brake system) in the
vehicle fluently. And Scanner can be used to diagnose vehicle status and defectives.
<00760097008c00990088009b00900095008e0047009b008c00940097008c00990088009b009c0099008c0047009900880095008e008c00470096008d0047006c006a007c00470090009a0047009500960099009400880093009300a000470054005b005700
47009b009600470052005f005c00b6006a004700880095008b> protected from factors like oil,
water and electromagnetism and there should be no mechanical shocks.
To control the fuel volume precisely under repeated injections, high current should be applied instantly
so there is injector drive circuit in the ECU to generate necessary current during injector drive stages.
Current control circuit divides current applying time (injection time) into full-in-current-phase and hold-
current-phase and then the injectors should work very correctly under every working condition.
b. Control Function
Controls by operating stages
To make optimum combustion under every operating stage, ECU should calculate proper injection
volume in each stage by considering various factors.
Starting injection volume control
During initial starting, injecting fuel volume will be calculated by function of temperature and engine
cranking speed. Starting injection continues from when the ignition switch is turned to ignition
position to till the engine reaches to allowable minimum speed.
Driving mode control
If the vehicle runs normally, fuel injection volume will be calculated by accelerator pedal travel and
engine rpm and the drive map will be used to match the drivers inputs with optimum engine power. -
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(14) Immobilizer control
A. 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.
B. Components
Basic components (ignition key system) ▶
D20DTR ECUImmobilizer antennaIndicator/Warning Lamp
Start motorImmobilizer key

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C. Key approval process
When turning the ignition switch to ON position, the power is supplied to BCM and ECU. ECU
communicate with the immobilizer key to check if it is valid crypto code. If it is valid, ECU start to control
the engine when turning the ignition switch to START position. The system has 10 seconds of valid time-
out period. If the engine does not start in this period, the key approval process should be done again.

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8) Ignition Key Hole Illumination (Except For Immobilizer)
<007b008f008c00470090008e00950090009b00900096009500470092008c00a00047008f00960093008c0047009000930093009c0094009000950088009b0090009600950047008a00960094008c009a0047009600950047009e008f008c00950047009600
97008c009500900095008e0047009b008f008c0047008b0099>iver’s door or passenger’s
door while the ignition key is removed.
The ignition key hole illumination stays on for 10 seconds when closing the door after step 1.
<007b008f008c00470096009c009b0097009c009b0047009a009b00960097009a0047009e008f008c00950047009b008f008c00470090008e00950090009b00900096009500470092008c00a000470090009a0047009b009c00990095008c008b0047009b00
96004702c80076007502c9004700970096009a0090009b0090>on.
The output stops when receiving the lock signal from the remote control key (under armed
mode). 1.
2.
3.
4.

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

03-4
2) System Diagram
The certification for the immobilizer is performed when turning the ignition switch to the "ON"
position after the CAN communication between the ECU and immobilizer is established.

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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