1998 SSANGYONG MUSSO diagram

9U-2 CONTROL UNITS AND SYSTEM
STICS
SCHEMATIC AND ROUTING DIAGRAMS

SECTION 9W
IMMOBILIZER SYSTEM
Function Description . . . . . . . . . . . . . . . . . . 9W-2
System Description . . . . . . . . . . . . . . . . . . . . . 9W-3
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 9W-8
Gasoline Engine . . . . . . . . . . . . . . . . . . . . . . . 9W-8
Diesel Engine . . . . . . . . . . . . . . . . . . . . . . . . 9W-10
Schematic and Routing Diagrams . . . . . . . 9W-12
TABLE OF CONTENTS
Caution: Disconnect the negative battery cable before removing or installing any electrical unit or when a
tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable
will help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless otherwise
noted.
Gasoline Engine (HFM) Immobilizer . . . . . . . 9W-12
Diesel Engine Immobilizer . . . . . . . . . . . . . . . 9W-13
Diesel Engine Immobilizer (Crypto Type) . . . . 9W-14
Maintenance and Repair . . . . . . . . . . . . . . 9W-15
On-Vehicle Service . . . . . . . . . . . . . . . . . . . . . 9W-15
Immobilizer Antenna . . . . . . . . . . . . . . . . . . . 9W-15

9W-4 IMM OBILIZER SYSTEM
Active Antenna
lConnector
1234
1 : IGN (red) 2 : Ground (brown)
3 : Data in (yellow) 4 : Data Out (green)
Notice
Pin arrangement and spec. of connector is same for gasoline and diesel vehicles.
lWire circuit diagram
3
4 Ant.14
13E/G
ECU
IGNGround
13 : Crypto read
14 : Crypto write·

IMMOBILIZER SYSTEM 9W-5
Diesel Version
The Immobilizer System consists of an electronic device with integrated coil, called ‘Active Antenna’, the crypto
transponder, which is integrated in the ignition key, and the Immobilizer-Control-Unit (ICU).
The Active Antenna is mounted at the ignition lock and handles the following tasks :
lto supply the transponder with power
lto receive the data from the ICU and transmit it to the transponder
lto receive and demodulate the data from the transponder and transmit it to the ICU
The whole Immobilizer software, the authentication and the management of valid keys and controlling the fuel valve
is managed completely by the ICU.
lConnector
- Immobilizer unit - Solenoid valve
16
815
714
613
512
411
310
29
1123
1 : Data out 3 : Data in 6 : Ground
7 : Data line 8 : K-Line 9 : IGN1 : IGN (Brown)
2 : Code (Green)
3 : Ground (Black)
l
Wire circuit diagram
Antenna
3
4
2
1Immo.
unit7
8Solenoid
valve 2
11
3
693
IGN
K-line (Diagnosis)
Solenoid Fuel Valve
Immobilizer System for Diesel Vehicles

IMMOBILIZER SYSTEM 9W-7
System Integration
The med 98.2 immobilizer is an anti-theft protection device allowing the start of the engine only if a specific authorization
is obtained during the start up phase. The med 98.2 will allow (prohibit) the start of the engine by driving ON (OFF) an
internal solenoid valve.
The med 98.2 is a single unit integrating the following subsystem :
la valve that allows (valve open) or blocks (valve closed) the fuel flow through the engine fuel system
la microprocessor control system to control and activate the valve during the start up of the engine, in order to
allow the start up only when a specific permission is given
the med 98.2 task is, therefore, to prevent the non authorized start up of the engine.
The functional unit includes also a basic set of electronic components whose function is to reduce its dependence on
the microprocessor control system: a part from a short temporarily period, during the start up phase, the electronics
allows the control system to excite and open the valve, but it doesn’t allow to close it.
The valve can be shut off only after the KL 15 has been deactivated.
The structure allows to obtain the highest degree of safe-operation (functionality fail-start): a failure in the
microprocessor unit cannot cause the shut-off of the valve. The main consequence of this type of failure is to prevent
the next engine start up.
As a result of the above considerations, the med 98.2 immobilizer can realize its anti-theft functionality only in conjunction
with a control device: the ICU.
The ICU, when requested, sends a coded message to med 98.2 according to a settled communication protocol. The
med 98.2 will allow the start of the engine based upon this message.
In addition to the basic anti-theft functionality, the 98.2 immobilizer provides a number of diagnostic services when it
is connected to an external test instrument (SCAN-100). Those connections are depicted in the following integration
diagram (Fig. 1), where the dashed line indicates a temporary link for diagnostic purposes, and the shaded area the
med 98.2 system’s physical boundaries:
Fig. 1 - System Integration
Explanation of symbols:
med 98.2Immobilizer
ICU Immobilizer Control Unit
TESTER Device that can be connected for diagnostic purposes
K-LINESerial line for communication with ICU
KL15 Ignition key (Power supply for med 98.2)
GND Ground

9W-12 IMMOBILIZER SYSTEM
SCHEMATIC AND ROUTING DIAGRAMS
GASOLINE ENGINE (HFM) IMMOBILIZER

IMMOBILIZER SYSTEM 9W-15
Notice
For circuit diagram of gasoline vehicle, refer to the ECU diagram.
IMMOBILIZER ANTENNA
Immobilizer antenna is installed in key set outer surface (it is
installed in the location of key hall illumination).(see the figure)
1 Immobilizer Antenna
2 Key
3 Transponder
MAINTENANCE AND REPAIR
ON-VEHICLE SERVICE