SsangYong Musso. Manual - part 37

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

!

If 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.

!

Programming 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

!

The transponder in the key can be damaged by shocks of
dropping or hitting other objectives, so handle it with care.

!

Each supplied key has programming of code on its own.
Accordingly if ECU needs to be replaced, replace the
transponder in the key.

!

The vehicle equipped with immobilizer system will never be
started with remote ignition device, so do not attempt to
install it.

!

The immobilizer system will never be removed from the
vehicle. So never attempt to remove it to install a remote
ignition device or others.

!

If 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-3

SYSTEM DESCRIPTION

Gasoline 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 engine management system (EMS).

The Active Antenna is mounted at the ignition lock and handles the following tasks :

!

To supply the transponder with power

!

To receive the data from the EMS and transmit it to the transponder

!

To receive and demodulate the data from the transponder and transmit it to the EMS

The whole Immobilizer software, the authentication and the management of valid keys is completely managed by the
EMS.

Immobilizer system for gasoline vehicle

9W-4  IMM OBILIZER SYSTEM

Active Antenna

!

Connector

1

2

3

4

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.

!

Wire circuit diagram

3

4

Ant.

14

13

E/G

ECU

IGN

Ground

13 : Crypto read
14 : Crypto write

•