immobilizer ISUZU TF SERIES 2004 Workshop Manual

IMMOBILIZER SYSTEM 11A-9

Diesel Engine With Engine Immobilizer Unit (4JA1-T Mechanical Control Engine)






RAW4B0LF000401

11A-10 IMMOBILIZER SYSTEM

Parts Location
LTW3BAMF000101

Legend

(1)
Immobilizer Control Unit (ICU)

(2)
Immobilizer Coil



(3)
Cross Beam

(4)
Steering Shaft

IMMOBILIZER SYSTEM 11A-11

Immobilizer control unit (ICU); For
Electronic Control Engine (6VE1,
C24SE, 4JH1-TC, 4JA1-TC)
Immobilizer control unit (ICU) permits engine starting,
when the security code which compares the securit
y
code registered into the transponder (key) and the
security code registered into ICU, and is similarl
y
registered into ICU and engine control unit (ECM) is
compared and it is judged that it is normal. When the
code registered into the key is unusual, and when not
recognizing a security code, ICU does not permit
starting of engine.


RUW38HSF000101

11A-12 IMMOBILIZER SYSTEM

Pin-outs; For Electronic Control Engine (6VE1, C24SE, 4JH1-TC, 4JA1-TC)
RUW38HSF000201


No. Pin Function
A-1 Antenna coil positive
A-2


A-3 Antenna coil negative
B-1 Starter Relay (6VE1, C24SE Engine) / Immobilizer Relay (4JH1-TC/4JA1-TC Engine)
B-2 Ground
B-3 Voltage from ignition switch ON
B-4 Back up voltage supply
B-5 To Tech-2
B-6 Vehicle speed sensor (6VE1, C24SE Engine) / Not used (4JH1-TC/4JA1-TC Engine)
B-7 Communication: carry on line from ECM to ICU (Check engine lamp)
B-8 Communication: carry on line from ICU to ECM (Communication line W)

IMMOBILIZER SYSTEM 11A-13

Immobilizer control unit (ICU);
Mechanical Control Engine (4JA1-T)
Immobilizer control unit (ICU) permits engine starting,
when the security code which compares the securit
y
code registered into the transponder (key) and the
security code registered into ICU, and is similarl
y
registered into ICU and engine immobilizer unit (DDS-1)
is compared and it is judged that it is normal. When the
code registered into the key is unusual, and when not
recognizing a security code, engine immobilizer unit
does not permit starting of engine by the fuel cut valve
on the fuel pump.
The engine immobilizer unit is located with fuel cut
valve on fuel pump 4JA1-T engine.
The immobilizer control unit decides whether there is an
abnormality the security code based on the engine
immobilizer unit security code.
When the problem found, the engine immobilizer unit
stops fuel fupply by the fuel cut valve.




RAW4B0SF000101

11A-14 IMMOBILIZER SYSTEM

Pin-outs




RUW48HSF000201


No. Pin Function
1 Back up voltage supply
2 Voltage from ignition switch ON
3 Lamp
4


5


6 Antenna coil positive
7 Ground
8 Engine immobilizer unit
9 To Tech2
10


11

12


13 Antenna coil negative
14 Starter cut relay

IMMOBILIZER SYSTEM 11A-15

Immobilizer coil (Antenna)
Immobilizer coil is install in order that ICU may check
the security code memorized by the transponder (key).

RUW38HSH000301
Transponder (Key)
Transponder is installed in the inside of a key.
Transponder has memorized the security code of a
immobilizer system.

LTW3BASH000101

Legend


(1) Transponder (Key)



Check engine lamp
Check engine lamp displays failure or a system
operation of a immobilizer system by flash of a lamp.

LTW3BASH000201
Engine control module (ECM)
ECM will stop engine, if it communicates with ICU and
abnormalities are detected by a key and the immobilize
r
system.

LTW3BASH000301

Legend


(1) ECM (6VE1 engine)

(2) ECM (C24SE engine)

(3) ECM (4JH1-TC engine)

11A-16 IMMOBILIZER SYSTEM

Car Pass Card
Each vehicle has a car pass, which is issued to the
customer on delivery of the vehicle along with the othe
r
papers.


RUW38HMF000201

Notes:

This car pass is an important document and must be
treated with the same care as the vehicle papers.
It must not be kept in the vehicle. The customer must
present the car pass for operations involving the
immobilizer or the engine control unit.

Loss of car pass card
If the car pass is lost, the data can be requested from
your proper organization name. This request will only be
processed if accompanied by the enclosed form and
proof of ownership. Once the data is received, it can be
entered in a blank car pass and given to the customer.
The unused car pass should be destroyed.

Instructions on Filling Out the form "Data
request, car pass"
To be provided by the dealership.
The data requested under items 1-10 must be provided
completely, including the authorized dealership number,
the vehicle Identification number (VIN) and engine
type/number (Engine type/No).

Mark missing data / desired data with a cross:


Security code (for diagnosis and programming with
Tech-2)


Mechanical key Number
Complete the form by entering the data and
signature/authorized dealership stamp and send it along
with proof of ownership (Vehicle lD or invoice) to
address provided in the form. The requested data will
be sent by Fax to the dealership that made the request
after your organization has confirmed that the info is
corrected.

IMMOBILIZER SYSTEM 11A-17

Important Instructions
Only data corresponding to the delivery status of the
vehicle can be issued. Car pass data requests will onl
y
be processed if the first column is filled out completely.
Signed and sent to your organization along with proof of
ownership.
Information via telephone is only possible in exceptional
circumstances via your service organization.
As for the delivery of new vehicles, the customer must
be informed about all features of the car pass that are
relevant to vehicle security, for example, that the ca
r
pass should be kept in a safe place(not in the vehicle)
and should be presented when an authorized you
r
organization name workshop is visited, The exact
phrasing can be found in the relevant Owner's Manual.

11A-18 IMMOBILIZER SYSTEM


RUW38HXF000201