2007 ISUZU KB P190 Engine

IMMOBILIZER SYSTEM (C24SE, 4JA1-T) 11A-9
Immobilizer control unit (ICU); For
Electronic Control Engine (C24SE)
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. W hen the
code registered into the key is unusual, and when not
recognizing a security code, ICU does not permit
starting of engine.


RUW 38HSF000101


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ISUZU KB P190 2007

11A-10 IMMOBILIZER SYSTEM (C24SE, 4JA1-T)
Pin-outs; For Electronic Control Engine (C24SE)
RUW 38HSF000201


No. Pin Function
A-1 Antenna coil positive
A-2

A-3 Antenna coil negative
B-1 Starter Relay
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
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)


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IMMOBILIZER SYSTEM (C24SE, 4JA1-T) 11A-11
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. W hen 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.
W hen the problem found, the engine immobilizer unit
stops fuel supply by the fuel cut valve.






RAW 4B0SF000101

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11A-12 IMMOBILIZER SYSTEM (C24SE, 4JA1-T)
Pin-outs





RUW 48HSF000201


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



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ISUZU KB P190 2007

IMMOBILIZER SYSTEM (C24SE, 4JA1-T) 11A-13
Immobilizer coil (Antenna)
Immobilizer coil is install in order that ICU may check
the security code memorized by the transponder (key).

RUW 38HSH000301
Transponder (Key)
Transponder is installed in the inside of a key.
Transponder has memorized the security code of a
immobilizer system.

LTW 3BASH000101

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.




RTW 76ESH004001
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.









RTW 7BASH000601

Legend
(1) ECM (C24SE engine)




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ISUZU KB P190 2007

11A-14 IMMOBILIZER SYSTEM (C24SE, 4JA1-T)
Car Pass Card
Issue of a car pass card is based on distributer. A car
pass card is issued to the customer on delivery of the
vehicle along with the other papers.


RUW 38HMF000201

Notes:
This car pass card 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 card for operations involving the
immobilizer or the engine control unit.

Loss of car pass card
If the car pass card 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.


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IMMOBILIZER SYSTEM (C24SE, 4JA1-T) 11A-17
lmportant information on Programming
Security code
The security code protects the immobilizer control unit
against unauthorized programming and data access
from Tech-2. The security code consists of a 4 digit
code number and is programmed into the immobilize
r
control unit and Engine Control Module (ECM).
New control units are not programmed with a securit
y
code.
If the control units are replaced, the security code
entered in the car pass, transponder lD, etc.
Must be programmed into the new control unit with
Tech-2.
The security code can only be programmed with Tech-2
once and must therefore be performed with great care.
Once programmed, the security code cannot be
overwritten. An already used immobilizer can be reused
in a different car by initializing the immobilizer. After that
you can program the security code again. For initializing
command you need the current security code.
If the immobilizer control unit is returned, always
enclosed the security code that is allocated to that
control unit. If this is not done, we can not process the
case and the warranty will not be recognized.
Entering a code
If the Tech-2 display requests that the
• security code
• mechanical key number
• Vehicle Identification No.
be entered, process as follows;
To input a digit you need to use the up and down
buttons of the Tech-2. By using the numeric buttons the
according digit will be displayed at the current position
and the cursor will move to the next position.
For letters you need to use the up and down buttons o
f
the Tech-2. The up and down key might be used for
digits as well. By using the up and down buttons the
displayed digit or letter will be increased or decreased.
To move to the next position you need to use the move-
to-right-button.
W ith the two buttons, move-to-right and move-to-left
you can select the position of number you want to
change.
This will allow you to correct a wrong number.
After the number is completed you need to press the
Enter button to accept the number. Correction is now no
longer possible.
Use the OKAY soft key to program the number and the
NOT OKAY soft key to abort the programming.
Transponder (Key)

•
••
•
If a transponder key is lost:
If a transponder key is lost, all transponder keys in the
immobilizer control system must be erased.
Transponder keys can be ordered via the "Your prope
r
organization name such as part and accessory
department" as previously by providing the mechanical
key number.
The mechanical key number is provided on the car pass
card.
Thereafter, existing and new transponder keys are
programmed consecutively using Tech-2. The vehicle
can then no longer be started using lost key.
•
••
•
5 transponder keys can be provided:
Each transponder has different Identifications. If a
customer wants more than 2 transponder keys,
maximum 5 transponder keys can be provided b
y
additional programming by Tech-2.
•
••
•
lf a new ignition key with different mechanical key
number needs to be installed:
If installation of an ignition lock with a different
mechanism key number is necessary (an ignition lock
which belongs to the mechanical key number has to be
ordered first), all transponder keys must first be erased
and the two transponder keys which belong to the
ignition lock that is now installed must be programmed.
The new mechanical key number must be programmed
now into the immobilizer. The mechanical key numbe
r
in the car pass is to be changed as well.
Important:
After successful programming, the engine control can
only be used for vehicles with immobilizer and
transponder.
Faults that occur in connection with the immobilize
r
control unit are recognized by the engine control unit
and as long as "IMMOBILOZER" is not programmed,
are indicated by a flashing of the check engine lamp.
If the immobilizer and engine control unit are replaced
at the same time, the immobilizer control unit must be
programmed first before the "IMMOBILIZER" function in
the engine control unit can be activated.

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IMMOBILIZER SYSTEM (C24SE, 4JA1-T) 11A-19
Menu
The following table shows which functions are used for
the available equipment versions.



F0: Diagnostic Trouble Codes
F0: Read DTC Info Ordered By Priority
F1: Read DTC Info As Stored By ECU
F2: Clear DTC Information F1: Data Display
F2: Snap Shot
F3: Additional Function
F0: Read ECU Identification
F1: Reset Immobilizer
F2: Reset Engine Control Module
F3: Erase Transponder-Keys F4: Programming
F0: Program Immobilizer Function
F1: Program Transponder-Keys

NOTE: Before going to programming process, Tech-2
indicates instruction as follows.

060R200289
DTC
On OBD has two options available in the Tech 2 DTC
mode to display the enhanced information available.
• Read DTC Info Ordered By Priority
• Read DTC Info As Stored By ECU
Clear DTC Information
To clear Diagnostic Trouble Codes (DTCs), use the
diagnostic scan tool "clear DTC information" function.
Tech-2 Data Display

Use the Tech 2 Data Values only after the On-Board
Diagnostic System Check has been completed, no
DTC(s) were noted, and you have determined that the
on-board diagnostics are functioning properly.
The Tech 2 data values represent values that would be
seen on a normally-immobilizer system.
Check Vehicle Identification Number (VIN)
1. Select "Body" and "Immobilizer".
2. Select "Additional Function" and "Read ECU
Identification".
3. Shows up VIN on tech-2 display.
Reset Immobilizer (Reset Immobilizer
Control Unit)
1. Select "Body" and "Immobilizer".
2. Select "Additional Function" and "Reset
Immobilizer".
3. Enter the security code and press Confirm.
4. Reset Immobilizer screen shows up with warning.
See the following screen.

060R200279



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