lock ISUZU KB P190 2007 Workshop Repair Manual

IMMOBILIZER SYSTEM (C24SE, 4JA1-T) 11A-35
B0002 IMMOBILIZER NOT PROGRAMMED
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 immobilizer programming functions.
• Immobilizer control unit (ICU).
If a problem is found, repair as necessary.
(Refer to "Important information on Programming")
W as the action complete? 
Go to Step 3 Go to Step 5
3 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 B0002 stored? 
Go to Step 4 Verify repair
4 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 
5 Check the immobilizer programming functions.
• Engine control module (ECM).
• Immobilizer control unit (ICU).
If a problem is found, repair as necessary.
(Refer to "Important information on Programming")
W as the action complete? 
Verify repair Go to Step 6
6 Replace the key and lock cylinder assembly and
immobilizer system (ICU and ECM).
IMPORTANT:
• ICU and ECM are not replacing simultaneously.
• After replace lock cylinders, perform the following
below the items.
• Program the immobilizer system.
(Refer to "Important information on Programming")
W as the action complete? 
Verify repair 

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ISUZU KB P190 2007

IMMOBILIZER SYSTEM (C24SE, 4JA1-T) 11A-49
B0013 IMMOBILIZER NOT PROGRAMMED (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 immobilizer programming functions.
• Immobilizer control unit (ICU).
If a problem is found, repair as necessary.
(Refer to "Important information on Programming")
W as the action complete? 
Go to Step 3 Go to Step 5
3 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 B0013 stored? 
Go to Step 4 Verify repair
4 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 
5 Check the immobilizer programming functions.
• Engine control immobilizer unit.
• Immobilizer control unit (ICU).
If a problem is found, repair as necessary.
(Refer to "Important information on Programming")
W as the action complete? 
Verify repair Go to Step 6
6 Replace the key and lock cylinder assembly and
immobilizer system (ICU and Engine immobilizer
unit).
IMPORTANT:
• ICU and Engine immobilizer unit are not
replacing simultaneously.
• After replace lock cylinders, perform the
following below the items.
• Program the immobilizer system.
(Refer to "Important information on Programming")
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-2 ANTITHEFT SYSTEM

Service Precaution
WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE
SRS COMPONENTS OR THE SRS WIRING, REFER
TO THE SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS COULD RESULT IN
POSSIBLE AIR BAG DEPLOYMENT, PERSONAL
INJURY, OR OTHERWISE UNNEEDED SRS SYSTEM
REPAIRS.
CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or
other corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener.
When you install fasteners, use the correct
tightening sequence and specifications. Following
these instructions can help you avoid damage to
parts and systems.

General Description
The Antitheft system consists of the four major
components which are Antitheft Control Unit (ACU),
Antitheft horn, key (remote key), and scan tool (Tech-2).
This system can be activated by a correctly
programmed key (remote key) and starter switch is set
to OFF.
This system can be deactivated by a correctly
programmed key (remote key) connected with a
correctly programmed ACU and a correctly
programmed lCU.
W hen the vehicle doors, and engine hood are locked,
the antitheft alarm system is designed to protect your
vehicle and valuables from theft.
Any attempt to forcibly open any door, the engine hood
without using the vehicle key (or remote control) will
cause the hazard lights to flash on and off and the horn
to sound intermittently. This will continue for 30 seconds
(Hazard lamp flash; For 5 minutes) before the system
automatically shuts itself off.
Please operate the door either the key lock or remote
key after closing all doors to arm the alarm system.
Miss waning will be detected when the passenger door
is opened with locked condition and then this door is
closed.

During the first 10 seconds:
• LED lights up; Test, switch - on delay
• LED rapidly flashes (2Hz); Door, bonnet, open or
system fault

After approx. 10 seconds:
• LED slowly flashes; System on (0.5Hz)


RTU7Z0SH019101
Activating the anti-theft system
1. W hen the key switch is turned to the ACC position or
removed from the starter switch.
2. Closing and locking all the doors by the keylock o
r
remote key, and the engine hood will cause the
indicator light to come on.
3. Approximately 10 seconds later, the indicator light will slow flash. The anti-theft system is now in
operation.
Antitheft system alarm operating
conditions
W hen the antitheft system is engaged, the alarm will
operate under the following condition;

1. W henever some forcibly attempts to open a door, the engine hood without using the key.
2. W henever someone unlocks a door with door lock knob.
3. W henever the engine hood release handle is operated.



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ISUZU KB P190 2007

ANTITHEFT SYSTEM 11B-3
Function of a keyless entry system
W ith a keyless entry system the car can be locked or
unlocked from any position around the car up to a
specified distance, by using the potable radio remote
transmitter inside key (remote key).
Status LED
W hile the system is in delay the alarm system is active
and LED flashes at 0.5Hz with or without activated
interior protection.
Hazard relay
The hazard warning lights will be activated by an
external relay. The output is low active.
Switches
All switches to ground. This makes it possible for failure
analysis to detect a short circuit or a broken wire to
each switch. To use this feature it is necessary to place
a 1.8k Ω resistor in parallel to the required switch.
Receiver
The receiver is integrated into the control unit.
To lower the idle current the receiver is equipped with a
standby mode. The antenna is integrated on the printed
circuit board.
Depending on the mounting position of the control unit
the antenna can be connected externally.
Range of communication
The range of communication between remote key and
receiver is intended to be least 3 m from centre of the
car.


Diagnosis
For diagnostic purpose the communication with an
internal diagnostic device ( Tech-2 ) is possible.

901RW 176
Transmitter (into remote key)
• Electronics integrated in remote key container for
TFR/TFS.
• Antenna integrated in remote key container.
• Frequency band is 433.92 MHz.
• Two function buttons (Door lock/Door unlock)
• Two status LED for TF (Door lock/Door unlock)


OM


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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

ANTITHEFT SYSTEM 11B-25
Pin-Assignment
No. Pin Assignment 28 PIN
1 Contact switch driver door
2 Contact switch doors
3 —
4 Power supply antitheft
5 horn
6 Contact switch engine compartment
7 Diagnosis
8 —
9 —
10 —
11 Status LED
12 —
13 —
14 —
15 Lock driver side door lock cylinder
16 Unlock driver side door lock cylinder
17 —
18 Micro Switch, lock / unlock door lock motor
19 —
20 —
21 —
22 —
23 —
24 —
25 —
26 —
27 —
28 Flasher control

No. Pin Assignment 12 PIN
1 —
2 —
3 Key in
4 —
5 —
6 Micro Switch, unlock, auto door lock
7 Lock, locking motors
8 Unlock, locking motors
9 Power supply locking motors
10 —
11 Ground
12 —


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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

ANTITHEFT SYSTEM 11B-35
Tech-2 Data List
No. Data List Units
1 Battery Voltage V
2 ‘KEY-IN’ Status ON/OFF
3 CDLS-Motor Voltage (Central Door Locking System) V
4 Accident Sensor (Crash Sensor) Active/Inactive
5 Remote Key Active/Inactive
6 Remote-Key Detected Remote Key No.
7 Key Function Detected Lock/Unlock
8 Prev. Detected Remote-Key (Previously) Remote Key No.
9 Previously Key Function Lock/Unlock
10 Remote-Key 1 Status In Range/Not Programmed
11 Remote-Key 2 Status In Range/Not Programmed
12 Remote-Key 3 Status In Range/Not Programmed
13 Remote-Key 4 Status In Range/Not Programmed
14 Remote-Key 5 Status In Range/Not Programmed
15 Front Door Unlock Switch Active/Inactive
16 Front Door Lock Switch Active/Inactive
17 Front Door Lock Status Active/Inactive
18 Auto Door Unlock Switch Active/Inactive
19 Auto Door Lock Switch Active/Inactive
20 Auto Door Lock Status Active/Inactive
21 Trunk Signal Switch *Not used Open/Closed
22 Doorknob Switch Open/Closed
23 Doorknob Status Lock/Unlock
24 Trunk Doorknob Switch *Not used Open/Closed
25 Trunk Doorknob Status *Not used Lock/Unlock
26 Driver Door Switch Open/Closed
27 Driver Door Status Open/Closed
28 All Door Switch Open/Closed
29 All Door Status Open/Closed
30 Door lock Tamper Switches Open/Closed
31 Engine Hood Switch Open/Closed
32 Engine Hood Status Open/Closed
33 Trunk Switch *Not used Open/Closed
34 Trunk Status *Not used Open/Closed
35 Pane Breakage Connected *Not used Yes/No
36 Pane Breakage Status *Not used Disabled/Abled
37 CDLS-Motor Current (Central Door Locking System) A
38 CDLS-Motor Unlock (Central Door Locking System) V
39 CDLS-Motor Lock (Central Door Locking System) V
40 Overflow Protection Active/Inactive
41 Turn Signal Active/Inactive
42 Horn Connected Yes/No
43 Horn Signal Active/Inactive
44 Theft LED ON/OFF
45 CDLS-Status (Central Door Locking System) Lock/Unlock
46 Selftest Request Active/Inactive
47 Last Use —
48 Theft Status Disabled/Abled
49 Alarm Status Active/Inactive
50 Security Wait Time Active/Inactive

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11B-36 ANTITHEFT SYSTEM

Diagnosis
Diagnostic procedure
• Once the cause of DTC is repaired or gone,
engine can be operated normally, and present
DTC becomes history code.
• History code is canceled by no repeat failure on 25
consequence ignition key on afterward.
• History code cannot be canceled by batter
y
connector disconnected.
Clearing Diagnostic Trouble Codes
IMPORTANT: Do not clear DTCs unless directed to do
so by the service information provided for each
diagnostic procedure. W hen DTCs are cleared, the
Failure Record data which may help diagnose an
intermittent fault will also be erased from memory.
Verifying Vehicle Repair
Verification of vehicle repair will be more
comprehensive for vehicles with immobilizer system
diagnostic. Following a repair, the technician should
perform the following steps:
1. Review and record the Fail Records for the DTC which has been diagnosed.
2. Clear DTC (s).
3. Operate the vehicle within conditions noted in the Fail Records.
4. Monitor the DTC status information for the DTC which has been diagnosed until the diagnostic test
associated with that DTC runs.
Following these steps are very important in verifying
repairs on immobilizer systems. Failure to follow these
steps could result in unnecessary repairs.
Diagnostic Aids
An intermittent may be caused by the following:
• Poor connections.
• Miss routed harness.
• Rubbed through wire insulation.
• Broken wire inside the insulation.
Check for the following conditions:
• Poor connection at ACU-Inspect harness
connectors for backed out terminals, imprope
r
mating, broken locks, improperly formed or
damaged terminals, and poor terminal to wire
connection.
• Damaged harness-Inspect the wiring harness fo
r
damage.
If the harness appears to be OK, observe the data
display on the Tech2 while moving connectors and
wiring harnesses related to the switch or actuator.

A change in the display will indicate the location of
the fault.
If DTC cannot be duplicated, the information included in the Failure Records data can be useful
in determined vehicle mileage since the DTC was
last set.
If it is determined that the DTC occurs intermittently, performing the DTC Diagnostic
Chart may isolate the cause of the fault.
NOTE: Breakage of antitheft fuse does not operate
antitheft system. Check LED lamp flashes at this time.

Check the Electro-Magnetic Interference (EMI)
• Location of vehicle check
Move the vehicle to a new location and perform
the check again.
• Non-OEM Parts.
Switch is “OFF” or remove the Non-OEM parts and
perform the check again.
• Other
Remove the accessory and another key from key.

Check the other items.
• Battery voltage is low.
• Antitheft programming functions.
Must be programmed antitheft system.
• Registration for security code, antitheft control unit
parts number.
• Key switch operation.

Antitheft system may detect a history DTC by the
timing of ON-OFF of a key switch.
• Active the antitheft system.
• Keyless entry system is malfunction.
• Immobilizer system is malfunction.

Check the operation
Check the operation "Lock / unlock" by using transmitter
(key) on the vehicle.


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ISUZU KB P190 2007