2007 ISUZU KB P190 ECU

11A-54 IMMOBILIZER SYSTEM (C24SE, 4JA1-T)
B0024 WRONG TRANSPONDER KEY (Only 4JA1-T Engine)
Step Action Value(s) Yes No
1
W as the "Immobilizer System Check" performed? 
Go to Step 2 Go to Immobilizer
System Check
2 Check the key.
Is a key peculiar to a vehicle? 
Go to Step 3 Refer to
Diagnostic Aids
3 Check the immobilizer programming functions.
• Transponder (Key).
W as a problem found? 
Go to Step 4 Go to Step 5
4 Perform the immobilizer programming functions.
• Transponder (Key).
(Refer to "Important information on Programming")
W as the action complete? 
Go to Step 5 
5 Recheck the DTC.
1. Key position is “OFF” and keep the position for more than 30 seconds.
2. Key position is “ON”.
3. Check the DTC on scan tool.
Is DTC B0024 stored? 
Go to Step 6 Verify repair
6 Replace the transponder (Key).
IMPORTANT : The replacement transponder (key)
must be programmed the security data by scan tool.
W as the action complete? 
Go to Step 7 
7 Recheck the DTC.
1. Key position is “OFF” and keep the position for more than 30 seconds.
2. Key position is “ON”.
3. Check the DTC on scan tool.
Is DTC B0024 stored? 
Go to Step 8 Verify repair
8 Replace the immobilizer control unit (ICU).
IMPORTANT : The replacement ICU must be
programmed the security data by scan tool.
W as the action complete? 
Verify repair 


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ISUZU KB P190 2007

IMMOBILIZER SYSTEM (C24SE, 4JA1-T) 11A-55
B0055 EEPROM ERROR
Step Action Value(s) Yes No
1
W as the "Immobilizer System Check" performed? 
Go to Step 2 Go to Immobilizer
System Check
2 Recheck the DTC.
1. Key position is “OFF”.
2. Install the scan tool on vehicle.
3. Key position is “ON”.
4. Check the DTC on scan tool.
Is DTC B0055 stored? 
Go to Step 3 Refer to
Diagnostic Aids
3 Check the immobilizer control unit (ICU) circuit.
1. Ignition "OFF," disconnect the ICU.
2. Check the ICU circuit for an open, short to ground, or short to voltage.
Also, check the ICU ignition feed circuit for an open or
short to ground and the ICU ground circuit for an
open.
W as a problem found? 
Go to Step 4 Go to Step 5
4 Repair or replace the immobilizer unit (ICU) circuit.
W as the action complete? 
Verify repair 
5 Replace the immobilizer control unit (ICU).
IMPORTANT: The replacement ICU must be
programmed the security data by scan tool.
W as the action complete? 
Verify repair 



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ISUZU KB P190 2007

ANTITHEFT SYSTEM 11B-1
SECTION 11B
ANTITHEFT SYSTEM
TABLE OF CONTENTS


Service Precaution .................................................. 11B- 2
General Description ................................................ 11B- 2
Diagrams And Schematics ................................. 11B- 5 System W iring Diagrams ................................ 11B- 5
Parts Location ................................................. 11B- 6
Circuit Diagram ..............................................11B-10
Antitheft control unit (A) ...................................11B-24
Pin-outs ...........................................................11B-24
Pin-Assignment ...............................................11B-25
lmportant information on Programming..............11B-26
Tech-2 Scan Tool ...............................................11B-27 Operating Procedure .......................................11B-27
Menu ...............................................................11B-28
DTC .................................................................11B-28
Clear DTC Information ....................................11B-28
Tech-2 Data Display........................................11B-28
Actuator Test ...................................................11B-28
Programming...................................................11B-30
Tech-2 Data List ..............................................11B-35
Diagnosis............................................................11B-36 Diagnostic procedure ......................................11B-36
Clearing Diagnostic Trouble Codes ................11B-36
Verifying Vehicle Repair ..................................11B-36
Diagnostic Aids................................................11B-36
Diagnostic Trouble Code (DTC) list
For Antitheft.....................................................11B-37
Antitheft System Check ...................................11B-38
No Antitheft Lamp ...........................................11B-39
DTC13 Security code not yet programmed .....11B-40
DTC14 No remote key programmed ...............11B-41
DTC16 Door lock actuators short circuit
to ground .........................................................11B-42
DTC20 Broken wire to door lock actuators .....11B-43
DTC21 Remote key 1 with random code
out of capture range ........................................11B-44
DTC22 Remote key 2 with random code
out of capture range ........................................11B-45
DTC23 Remote key 3 with random code
out of capture range ........................................11B-46

DTC24 Remote key 4 with random code
out of capture range ........................................ 11B-47
DTC25 Remote key 5 with random code
out of capture range ........................................ 11B-48
DTC28 Input immobilizer short circuit
to ground ......................................................... 11B-49
DTC29 Broken wire to immobilizer ................. 11B-50
DTC31 Actuator driver door defect ................. 11B-51
DTC32 Actuator passenger door defect ......... 11B-52
DTC36 Broken wire to driver door................... 11B-53
DTC37 Broken wire to passenger door........... 11B-54
DTC41 Driver door Lock switch unlock
defect .............................................................. 11B-55
DTC42 Driver door Lock switch lock defect .... 11B-56
DTC43 Driver door Lock switch Super lock
defect .............................................................. 11B-57
DTC44 Passenger door Lock switch lock
defect .............................................................. 11B-58
DTC45 Passenger door Lock switch unlock
defect .............................................................. 11B-59
DTC47 Battery voltage for door lock actuators
is missing ........................................................ 11B-60
DTC50 A/D converter defect or battery
voltage less than 9 volt.................................... 11B-61
DTC51 EEPROM defect ................................. 11B-62
DTC52 EEPROM not programmed
by ISUZU ......................................................... 11B-63
DTC55 Control unit defect............................... 11B-64
DTC123 Output flasher short circuit to ground
or broken wire ................................................. 11B-65
DTC125 Output alarm horn broken wire ......... 11B-66

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ISUZU KB P190 2007

11B-4 ANTITHEFT SYSTEM
Transmitter (into remote key) power
The transmitted power is less than 10 m W .
Battery life time for transmitter power
The minimum life time of battery is 2 years with 15
lock/unlock cycles per day.
W hile the battery is changed, the data retention will be
at least 3 minutes without pressing a button.
Super lock
(Mechanical anti-theft locking system)
To Lock:
All doors must be closed; press the lock button on the
remote control unit again within 10 seconds after
locking or turn key in driver's door lock towards rear of
vehicle again within 10 seconds after locking, then turn
it back to the vertical position and remove.
Lock buttons on all doors are positioned such that doors
cannot be opened.
To unlock:
Press unlock button on remote key or turn key in
driver's door lock towards front of vehicle, then turn it
back to the vertical position and remove. If the key is
used, antitheft alarm sound operate which continues
until ignition switch turn ON. If a problem is found, open
the driver door as necessary.


No proper transmitter is available, what
should be done for the system?
W hen any proper transmitter is not available, a new
transmitter should be programmed. Up to 5 transmitters
can be provided with a scan tool (Tech-2) and by proper
procedure.
In addition to the absence of proper transmitter, it may
happen particular secret code to the particular vehicle is
missing. ln this case, the secret code must be provided
by your organization.
Otherwise transmitter cannot be programmed in any
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 ACU, new ICU and new transmitter 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.

• 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 antitheft 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

11B-26 ANTITHEFT SYSTEM

lmportant information on Programming
Security code
The security code protects the antitheft 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 antitheft
Control Module (ACU).
New control units are not programmed with a security
code.
If the control units are replaced, the security code
entered in the transmitter (into remote key).
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 antitheft can be reused in
a different car by initializing the antitheft. After that you
can program the security code again. For initializing
command you need the current security code.
If the antitheft 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
• Vehicle Identification No.
• Country code (Select 213 Germany in all items)
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 of
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.



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ISUZU KB P190 2007

11B-28 ANTITHEFT SYSTEM
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
F3: Read Alarm Codes
F1: Data Display
F2: Snap Shot
F3: Actuator Test
F0: Unlock/Lock Test
F1: Arm/Disarm Signal Test
F2: Horn Signal Test
F3: Turn Signal Test
F4: Theft LED Test
F4: Programming
F0: Erase Remote Keys
F1: Program Remote Keys
F2: Program Anti Theft Warning
F3: Program Country Code
F4: Program Vehicle Options
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.

Actuator Test
The actuator tests are used to check abnormalities in
the antitheft control system.
The actuators are operated by the ECU based on the
Tech-2 command signal.
Observe the actuators to check abnormalities in the
antitheft system.

Unlock/Lock Test
The unlock/lock test is used to check abnormalities in
the door lock control system.
1. Select “Body” and “Antitheft”.
2. Select ”Actuator Test” and “Unlock/Lock Test”.
3. Observe the door lock function.
4. Press the lock bottom.
5. Press the unlock bottom.



060R200279



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ISUZU KB P190 2007

11B-30 ANTITHEFT SYSTEM
Programming
Programming antitheft function is used to input security
code for the antitheft system by tech 2.
If the remote key or ECU replaced, program as
necessary.

Erase Remote Keys
1. Select “Body” and “Antitheft”.
2. Select “Programming”.
3. Select “Erase Remote Keys”.

RAW 4B0SH000601
The following screen shows up.

060R200289
4. Confirm the following screen shows up.

060R200284





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ISUZU KB P190 2007

ANTITHEFT SYSTEM 11B-31
Program Remote Keys
1. Select “Body” and “Antitheft”.
2. Select “”Programming”.
3. Select “Program Remote Keys”.

RAW 4B0SH000601
The following screen shows up.

060R200289
4. Confirm the following screen shows up.

060R200284
5. Input the security code.




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ISUZU KB P190 2007