2007 ISUZU KB P190 ECU

IMMOBILIZER CONTROL SYSTEM (4JK1/4JJ1/HFV6) 11A-43
e. Highlight "Tech 2" on the Diagnostic ToolSelection screen and click "Next".
f. Click "Close" on the Security Access Enabled screen.
g. Turn OFF the scan tool.
h. Disconnect the scan tool from the terminal.
5. Reinstall a scan tool to the vehicle.
6. Turn ON the ignition, with the engine OFF.
7. Select Diagnostics > Appropriate vehicle identification > Body > Immobilizer > Programming
> Immobilizer Link To ECM/ PIM.
8. Select "Immobilizer Replaced" Yes and select "PIM or ECM Replaced" Yes.
9. Input four digits of correct security code that belongs to this vehicle and follow the on-screen
instructions. The on-screen instruction repeats
twice.
Notice: An incorrect security code input causes a
security wait time.
10. Select "PIM and ECM Replaced". 11. Input 17 digits of correct VIN that is based on stamped VIN or affixed VIN plate on this vehicle.
12. Operate the ignition switch by following the onscreen instructions.
Notice: Keep away another key, another transponder
key, key number plate or other metal items from the
transponder key that is going to program.
13. The on-screen displays a message "Program more Transponder Keys?" If all transponder key(s) has
been programmed, press No and go to next step. If
more transponder key(s) need to be programmed,
press Yes and repeat from previous step.
14. The on-screen displays a message "Programming Successfully!" if ICU, ECM, PIM and all
transponder key(s) programming has been
completed, the press Confirm.
15. Turn OFF the ignition for 30 seconds.
16. Verify the engine starts using all programmed transponder key(s).

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ISUZU KB P190 2007

11A-44 IMMOBILIZER CONTROL SYSTEM (4JK1/4JJ1/HFV6)
Repair Instructions
Immobilizer Control Unit (ICU)
Replacement
Resetting ICU
Reset immobilizer security information in the old ICU.
Refer to Resetting and Programming Guidelines in this
section. If the old ICU cannot be communicated with a
scan tool, go to the next procedure.
Removal Procedure 1. Disconnect the negative battery cable.
2. Remove the steering column cover.
3. Disconnect the ICU harness connector.
4. Loose screws (1) and remove the ICU (2) from the steering lock(3).
Installation Procedure 1. Install the ICU (2) to the steering lock (3) and tighten screws (1).
2. Connect the ICU harness connector.
3. Install the steering column cover.
4. Connect the negative battery cable.
Programming ICU
Program immobilizer security information into the ICU.
Refer to Resetting and Programming Guidelines in this
section.
RTW7BASH000301
3
2
1

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ISUZU KB P190 2007

IMMOBILIZER SYSTEM (C24SE, 4JA1-T) 11A-1

IMMOBILIZER SYSTEM
(C24SE, 4JA1-T)
CONTENTS

Service Precaution .................................................. 11A-2
General Description ................................................ 11A-3
W hat happens without proper transponder
operation? ........................................................... 11A-5
No proper transponder is available, what
should be done for the system? ...................... 11A-5
Caution to the operation ..................................... 11A-5
Summary of operation ......................................... 11A-5
W hat your organization should provide for
your customer .................................................... 11A-5
Car Pass .............................................................. 11A-5
Security code management .............................. 11A-5
Essential tool (Scan tool : Tech-2) .................. 11A-5
Circuit Diagram .................................................. 11A-6
Parts Location .......................................................... 11A-8
Immobilizer control unit (ICU); For Electronic
Control Engine (C24SE) .................................... 11A-9
Pin-outs; For Electronic Control Engine
(C24SE) ............................................................... 11A-10
Immobilizer control unit (ICU); Mechanical
Control Engine (4JA1-T) ...................................11A-11
Immobilizer coil (Antenna) ....................................11A-13
Transponder (Key) ............................................11A-13
Check engine lamp ...........................................11A-13
Engine control module (ECM) ...........................11A-13
Car Pass Card ...................................................11A-14 Loss of car pass card .......................................... 11A-14
Instructions on Filling Out the form "Data
request, car pass" ............................................. 11A-14
Important Instructions ........................................ 11A-15
lmportant information on Programming ..............11A-17
Security code ....................................................... 11A-17
Entering a code ................................................... 11A-17
Transponder (Key) ............................................. 11A-17
Tech-2 Scan Tool .................................................. 11A-18
Operating Procedure .......................................... 11A-18
Menu .................................................................... 11A-19
DTC ...................................................................... 11A-19
Clear DTC Information ......................................11A-19
Tech-2 Data Display .......................................... 11A-19
Check Vehicle Identification Number (VIN) ....11A-19
Reset Immobilizer (Reset Immobilizer
Control Unit) ....................................................... 11A-19
Reset Engine Control Module (Reset ECM) ..11A-20
Erase transponder key ......................................11A-20
Programming Immobilizer Function ................11A-21
Programming ICU .............................................. 11A-22
Programming ECM ............................................ 11A-23
Programming ICU and ECM .............................11A-24
Transponder program ........................................ 11A-24
Data List .............................................................. 11A-26
Diagnostic procedure ............................................ 11A-27
Clearing Diagnostic Trouble Codes ....................11A-27
Verifying Vehicle Repair .......................................11A-27
Diagnostic Aids ...................................................... 11A-27
Check the condition for system parts ..............11A-27
Check the Electro-Magnetic Interference
(EMI) ................................................................... 11A-27
Check the other items .......................................11A-27
Check the operation ........................................... 11A-27
Diagnostic Trouble Code (DTC) list ....................11A-28
IMMOBILIZER SYSTEM CHECK .......................11A-30
NO IMMOBILIZER W ARNING LAMP ................11A-32
CHECK IMMOBILIZER W ARNING LAMP O
STEADY ................................................................ 11A-33
B0001 REPLACE ELECTRONIC CONTROL
UNIT (ECU) (IMMOBILIZER FAULT) ................11A-34
B0002 IMMOBILIZER NOT PROGRAMMED ...11A-35
B0003 TRANSPONDER KEY PROBLEM .........11A-36
B0004 IMMOBILIZER COIL CIRCUIT
(ANTENNA COIL FAULT) ...................................11A-38
B0005 COMMUNICATION LINE W VOLTAGE
LOW ....................................................................... 11A-39
B0006 COMMUNICATION LINE W VOLTAGE
HIGH ...................................................................... 11A-40
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ISUZU KB P190 2007

IMMOBILIZER SYSTEM (C24SE, 4JA1-T) 11A-5
What happens without proper transponder
operation?
One of the function of transponder is to deactivate or
activate starter function. lf the proper transponder is not
used, starter cannot be operated. Because starter rela
y
stays off, cranking engine is not possible.
After the starter relay is activated, transponder signal
triggers to let lCU calculate by transponder address
signal and immobilizer algorithm.
W hen the result matches with necessary condition, it
makes injector power source be activated.
If transponder does not send correct signal, lCU and
ECM do not activate injector system on.
Therefore the vehicle cannot be operated.
No proper transponder is available, what
should be done for the system?
W hen any proper transponder is not available, a new
transponder should be programmed. Up to 5
transponders can be provided with a scan tool (Tech-2)
and by proper procedure.
In addition to the absence of proper transponder, it ma
y
happen particular secret code to the particular vehicle is
missing. ln this case, the secret code must be provided
by your organization.
Otherwise transponder cannot be programmed in an
y
way.
lf the essential for a scan tool (Tech-2) for programming
and proper software for Tech-2 are not available, there
is no permanent way to fix system. Temporary replace
with new ECM, new ICU and new transponder without
any secret code can make the system be deactivated,
but it does not last long. Such a replacement does not
solve any condition. Even after replacement, the system
is activated automatically in short time and then no
operation of the vehicle can be made in any way.
Tech-2 should be provided in your organization.
Caution to the operation
lf an attempt is made to start the engine while the
immobilizer system is activated, the check engine lamp
flashes and the engine will not start.
Summary of operation
Switch on: Set the ignition and starter switch to OFF.
(Activate)
Switch off: Set the ignition and starter switch to ON b
y
using the transponder key. (Deactivate)

What your organization should provide for
your customer

•
••
•
Car Pass
For a new owner, your dealership must hand Car Pass
card, which has identification numbers of new owner's
vehicle immobilizer system. This information is ver
y
important in case of repair or lost of transponder.
The followings are necessary items provided by you
r
responsibility.
1) Car pass with identification for a new owner
2) Blank car pass card when it is for reissue
3) Instruction to dealers how to use car pass card
•
••
•
Security code management
Your organization must keep security codes for all
vehicles as confidential data. Once the security codes
are lost, anybody who have the security code can
access immobilizer system. Your organization has
responsibility of any missing vehicles caused by stolen
security code.
•
••
•
Essential tool (Scan tool : Tech-2)
Your dealership must have Tech-2, and Tech-2 updated
software for immobilizer system.



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ISUZU KB P190 2007

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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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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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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ISUZU KB P190 2007