2007 ISUZU KB P190 Immobilizer

11A-6 IMMOBILIZER SYSTEM (C24SE, 4JA1-T)
Circuit Diagram
•
••
•
Gasoline Engine (C24SE)





RTW 7BALF000101


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ISUZU KB P190 2007

IMMOBILIZER SYSTEM (C24SE, 4JA1-T) 11A-7
Diesel Engine With Engine Immobilizer Unit (4JA1-T Mechanical Control Engine)






RAW 4B0LF000401



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ISUZU KB P190 2007

11A-8 IMMOBILIZER SYSTEM (C24SE, 4JA1-T)
Parts Location
LTW 3BAMF000101

Legend
(1) Immobilizer Coil
(2) Immobilizer Control Unit (ICU)


(3) Cross Beam
(4) Steering Shaft



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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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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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ISUZU KB P190 2007

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