1998 SSANGYONG MUSSO service

SECTION 9U
CONTROL UNITS AND SYSTEM
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.
TABLE OF CONTENTS
Specifications . . . . . . . . . . . . . . . . . . . . . . . . 9U-1
STICS Specifications . . . . . . . . . . . . . . . . . . . 9U-1
Schematic and Routing Diagrams . . . . . . . . 9U-2
STICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9U-2
Function Description . . . . . . . . . . . . . . . . . . 9U-3
SPECIFICATIONS
STICS SPECIFICATIONS
Description
DC 12V
Dc 9V - 16V
Less than 1mA(key is removed and all doors locked)
-30°C - +80°C
Between terminal No.5 and 3,4,8,12,18,25
Between terminal No. 5 and 2,6,7,16,17
Between terminal No.5 and 11, 27Application
Voltage Rating
Voltage Rating
Current Consumption
Operating Temperature
Voltage Drop
(at DC 12V)Max. 1.2V
Max. 1.8V
Max. 2.0VSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9U-3
Maintenance and Repair . . . . . . . . . . . . . . 9U-10
On-Vehicle Service . . . . . . . . . . . . . . . . . . . . . 9U-10
STICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9U-10

9U-10 CONTROL UNITS AND SYSTEM
MAINTENANCE AND REPAIR
ON-VEHICLE SERVICE
STICS
STICS, electonic control warning device, controls 16 functions and contains the self diagnostic function detecting any
malfunctions in the sensors and load.
Removal & Installation Procedure
1. Disconnector the battery negative cable.
2. Unscrew 4screw from center console box.
3. Remove the center console box and disconnect 3 STICS
connectors.
4. Unscrew 3 fastening bolts and remove the STICS unit.
5. Installation should follow the removal procedure in the
reverse order.
1 STICS Unit
2 STICS Connector3 STICS Unit Fastening Bolt
4 Parking Brake Lever

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-2 IMMOBILIZER SYSTEM
Notice
lIf vehicle is equipped with immobilizer system and the engine
cranks normally but not start, check immobilizer system first
rather than ignition and other electrical systems because it
can be disabled fuel supply of injectors by ECU due to
defective immobilizer system.
lProgramming of the immobilizer system will be performed
by authorized personnel only. If following defective codes
for immobilizer system appear during diagnosis of vehicle
with SCANNER, ask immobilizer programming to authorized
personnel and actual programming should be performed
by authorized personnel only.
Display of defectives relevant to immobilizer system :
SCANNER
1. No communication with transponder
2. No immobilizer programming
lThe transponder in the key can be damaged by shocks of
dropping or hitting other objectives, so handle it with care.
lEach supplied key has programming of code on its own.
Accordingly if ECU needs to be replaced, replace the
transponder in the key.
lThe vehicle equipped with immobilizer system will never be
started with remote ignition device, so do not attempt to
install it.
lThe immobilizer system will never be removed from the
vehicle. So never attempt to remove it to install a remote
ignition device or others.
lIf engine does not start during service, use every key to
start the engine and then check immobilizer system finally.
FUNCTION DESCRIPTION
Immobilizer is a device disabling vehicle ignition unless a speific key is used and designed to help prevent vehicle
theft.
Immobilizer is comprised of two devices, a key with encoded transponder and engine control unit(ECU) with the same
encoding of the transponder. When a key is inserted into the key hole to start vehicle and turned to ‘ON’, the ECU
reads and decodes the transponder code and, if the same, starts the engine, it is called immobilizer. It means
immobilizer system disables starting by stopping fuel supply if the code in the transponder does not match the code
stored in ECU each other.
Cases that requires immobilizer
programming
1. Replacement ECU
In this case, replace the every transponder
of the key at once.
2. Replacement of the transponder
3. Additional key for lost 1 or 2 keys
1 ) Clear all codes for current keys from the
ECU
2 ) When using current key : clear code of
the transponder and re-program it
3) Additional (purchased) key : perform
programming
4. When lost all keys
1 ) Clear all memorized key codes from the
ECU
2 ) Replace the key and key set
3 ) Immobilizer programming

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

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