display ISUZU KB P190 2007 Workshop Repair Manual

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-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

11B-38 ANTITHEFT SYSTEM
Antitheft System Check
Step Action Value (s) Yes No
1
1. Key position is “ACC”, shut all doors and bonnet.
2. Observe the antitheft lamp.
Note: W hen a key switch is “ACC”, antitheft lamp will
turn on and a antitheft lamp (LED) will be flashing
after 10 seconds.
Is the antitheft lamp "ON” or flashing? — Go to Step 2 Go to
“No antitheft lamp”
2
1. Key position is “ON”, engine “OFF”.
2. Observe the antitheft lamp.
3. Key position is turned “ACC”.
4. Check the antitheft lamp will be turned flashing and lamp will be turned ACC after 10 seconds.
Is the antitheft lamp flashing? — Go to
DTC table Go to Step 3
3
1. Key position is “OFF”.
2. Install the Tech-2.
3. Key position is “ON” or “OFF”.
4. Attempt to display antitheft data with the Tech-2.
Does the Tech-2 display antitheft data? — Go to Step 9 Go to Step 4
4
1. Key position is “OFF”, disconnect the antitheft
control unit (ACU).
2. Check the DLC (Data Link Connector) circuit for an open, short to ground, or short to voltage.
Also, check the DLC ignition feed circuit for an open
or short to ground and the DLC ground circuit for an
open.
W as a problem found? — Go to Step 5 Go to Step 6
5 Repair or replace the DLC (Data Link Connector)
circuit.
W as the action complete? — Go to Step 3 —
6
1 Check the ACU ground circuit for an open, or
short to voltage. Also, check the ACU ignition feed
circuit for an open or short to ground and the ACU
ground circuit for an open.
2 If a problem is found, repair as necessary.
W as the problem found? — Verify repair Go to Step 7
7
Replace the antitheft control unit (ACU).
IMPORTANT: The replacement ACU must be
programmed the antitheft data by Tech-2.
W as the action complete? — Go to Step 8 —
8 Select “Display DTCs” with the Tech-2.
Are any DTCs stored? — Go to applicable
DTC table —
9
1 Observe the antitheft data list on Tech-2.
2 If a problem is found, repair as necessary.
W as the problem found? — System OK Go to
applicable sectio n


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ISUZU KB P190 2007

ANTITHEFT SYSTEM 11B-39
No Antitheft Lamp
Step Action Value (s) Yes No
1 Check the fuse for the antitheft power feed circuit.
(10A)
If a problem found, repair as necessary.
W as the problem found?
Is the action complete? — Verify repair Go to Step 2
2
1. Check the ACU ground circuit for an open, or
short to voltage. Also, check the ACU ignition feed
circuit for an open or short to ground and the ACU
ground circuit for an open.
2. If a problem is found, repair as necessary.
W as the problem found? — Verify repair Go to Step 3
3
1. Check the antitheft lamp LED circuit for an open,
or short to voltage.
2. If a problem is found, repair as necessary.
W as the problem found? — Verify repair Go to Step 4
4
1. Key position is “OFF”.
2. Install the Tech-2.
3. Key position is “ACC” or “OFF”.
4. Observe to display lamp data with the Tech-2.
Does the Tech-2 display antitheft lamp data ON? — Go to Step 5 Go to Step 6
5 Replace the antitheft lamp. — Verify repair —
6 Replace the antitheft control unit (ACU).
IMPORTANT: The replacement ACU must be
programmed the antitheft data by Tech-2.
W as the action complete? — Verify repair —


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ISUZU KB P190 2007

ANTITHEFT SYSTEM 11B-51
DTC 31 Actuator Driver Door Defect
Step Action Value (s) Yes No
1 W as the Antitheft System Check performed?
— Go to Step 2 Go to
antitheft
System Check
2 Recheck the DTC.
1. Key position is “OFF”.
2. Install the Tech-2 on vehicle.
3. Key position is “ON”.
4. Check the DTC on the Tech-2.
Is DTC 31 stored? — Go to Step 3 Refer to
Diagnostic Aids
3 Check the driver door locking motor function.
1. Key position is “OFF”.
2. Install the Tech-2 on vehicle.
3. Key position is “OFF”.
4. Observe to display locking motor data with the Tech-2.
5. Turn ON by driver door lock.
Does the Tech-2 display ON voltage? — Go to Step 4 Go to Step 5
4
1. Key position is “OFF”.
2. Observe to display unlocking motor data with the Tech-2.
3. Turn OFF by driver door lock.
Does the Tech-2 display ON voltage? — Refer to
Diagnostic Aids, and then go to step 5 Go to Step 5
5
1. Check the driver door locking motor circuit for an
open, short to ground, or short to voltage.
Also, check the motor connector for damage.
2. If a problem found, repair as necessary.
W as the problem found? — Verify repair Go to Step 6
6
1. Repair or replace the driver door locking motor.
2. Check the DTC on the Tech-2.
Is DTC 31 stored? — Go to Step 7 Verify repair
7 Replace the antitheft control unit (ACU).
IMPORTANT: The replacement ACU must be
programmed the security data by the Tech-2.
W as the action complete? — Verify repair —


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11B-52 ANTITHEFT SYSTEM
DTC 32 Actuator Passenger Door Defect
Step Action Value (s) Yes No
1 W as the Antitheft System Check performed?
— Go to Step 2 Go to
antitheft
System Check
2 Recheck the DTC.
1. Key position is “OFF”.
2. Install the Tech-2 on vehicle.
3. Key position is “ON”.
4. Check the DTC on the Tech-2.
Is DTC 32 stored? — Go to Step 3 Refer to
Diagnostic Aids
3 Check the passenger locking motor function.
1. Key position is “OFF”.
2. Install the Tech-2 on vehicle.
3. Key position is “OFF”.
4. Observe to display locking motor data with the Tech-2.
5. Turn ON by passenger door lock.
Does the Tech-2 display ON voltage? — Go to Step 4 Go to Step 5
4
1. Key position is “OFF”.
2. Observe to display unlocking motor data with the Tech-2.
3. Turn OFF by passenger door lock.
Does the Tech-2 display ON voltage? — Refer to
Diagnostic Aids ,
and then go to step 5 Go to Step 5
5
1. Check the passenger door locking motor circuit
for an open, short to ground, or short to voltage.
Also, check the motor connector for damage.
. If a problem found, repair as necessary.
W as the problem found? — Verify repair Go to Step 6
6
1. Repair or replace the passenger door locking
motor.
2. Check the DTC on the Tech-2.
Is DTC 32 stored? — Go to Step 7 Verify repair
7 Replace the antitheft control unit (ACU).
IMPORTANT: The replacement ACU must be
programmed the security data by the Tech-2.
W as the action complete? — Verify repair —


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ISUZU KB P190 2007

ANTITHEFT SYSTEM 11B-53
DTC 36 Broken Wire To Driver Door
Step Action Value (s) Yes No
1 W as the Antitheft System Check" performed?
— Go to Step 2 Go to
antitheft
System Check
2 Recheck the DTC.
1. Key position is “OFF”.
2. Install the Tech-2 on vehicle.
3. Key position is “ON”.
4. Check the DTC on the Tech-2.
Is DTC 36 stored? — Go to Step 3 Refer to
Diagnostic Aids
3 Check the driver door lock function.
1. Key position is “OFF”.
2. Install the Tech-2 on vehicle.
3. Key position is “OFF”.
4. Observe to display door lock data with the Tech-2.
5. Turn ON by driver door lock.
Does the Tech-2 display Closed? — Go to Step 4 Go to Step 5
4
1. Key position is “ON”.
2. Observe to display door lock data with the Tech-2.
3. Turn OFF by driver door lock.
Does the Tech-2 display Open ? — Refer to
Diagnostic Aids ,
and then go to step 5 Go to Step 5
5
1. Check the driver door lock circuit for an open,
short to ground, or short to voltage.
Also, check the motor connector for damage.
2. If a problem found, repair as necessary.
W as the problem found? — Verify repair Go to Step 6
6
1. Repair or replace the driver door lock.
2. Check the DTC on the Tech-2.
Is DTC 36 stored? — Go to Step 7 Verify repair
7 Replace the antitheft control unit (ACU).
IMPORTANT: The replacement ACU must be
programmed the security data by the Tech-2.
W as the action complete? — Verify repair —


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ISUZU KB P190 2007

11B-54 ANTITHEFT SYSTEM
DTC 37 Broken Wire To Passenger Door
Step Action Value (s) Yes No
1 W as the Antitheft System Check performed?
— Go to Step 2 Go to
antitheft
System Check
2 Recheck the DTC.
1. Key position is “OFF”.
2. Install the Tech-2 on vehicle.
3. Key position is “ON”.
4. Check the DTC on the Tech-2.
Is DTC 37 stored? — Go to Step 3 Refer to
Diagnostic Aids
3 Check the passenger door lock function.
1. Key position is “OFF”.
2. Install the Tech-2 on vehicle.
3. Key position is “OFF”.
4. Observe to display door lock data with the Tech-2.
5. Turn ON by passenger door lock.
Does the Tech-2 display Closed ? — Go to Step 4 Go to Step 5
4
1. Key position is “ON”.
2. Observe to display door lock data with the Tech-2.
3. Turn OFF by passenger door lock.
Does the Tech-2 display Open ? — Refer to
Diagnostic Aids ,
and then go to step 5 Go to Step 5
5
1. Check the passenger door lock circuit for an open,
short to ground, or short to voltage.
Also, check the motor connector for damage.
2. If a problem found, repair as necessary.
W as the problem found? — Verify repair Go to Step 6
6
1. Repair or replace the passenger door lock.
2. Check the DTC on the Tech-2.
Is DTC 37 stored? — Go to Step 7 Verify repair
7 Replace the antitheft control unit (ACU).
IMPORTANT: The replacement ACU must be
programmed the security data by the Tech-2.
W as the action complete? — Verify repair —


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ISUZU KB P190 2007

ANTITHEFT SYSTEM 11B-55
DTC 41 Driver Door Lock Switch Unlock Defect
Step Action Value (s) Yes No
1 W as the Antitheft System Check performed?
— Go to Step 2 Go to
antitheft
System Check
2 Recheck the DTC.
1. Key position is “OFF”.
2. Install the Tech-2 on vehicle.
3. Key position is “ON”.
4. Check the DTC on the Tech-2.
Is DTC 41 stored? — Go to Step 3 Refer to
Diagnostic Aids
3 Check the driver door lock function.
1. Key position is “OFF”.
2. Install the Tech-2 on vehicle.
3. Key position is “OFF”.
4. Observe to display door lock switch data with the Tech-2.
5. Turn ON by driver door lock.
Does the Tech-2 display Closed? — Go to Step 4 Go to Step 5
4
1. Key position is “OFF”.
2. Observe to display door lock data with the Tech-2.
3. Turn OFF by driver door lock.
Does the Tech-2 display Open ? — Refer to
Diagnostic Aids ,
and then go to step 5 Go to Step 5
5
1. Check the driver door lock switch circuit for an
open, short to ground, or short to voltage.
Also, check the door lock connector for damage.
2. If a problem found, repair as necessary.
W as the problem found? — Verify repair Go to Step 6
6
1. Repair or replace the driver door lock switch.
2. Check the DTC on the Tech-2.
Is DTC 41 stored? — Go to Step 7 Verify repair
7 Replace the antitheft control unit (ACU).
IMPORTANT: The replacement ACU must be
programmed the security data by the Tech-2.
W as the action complete? — Verify repair —


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11B-56 ANTITHEFT SYSTEM
DTC 42 Driver Door Lock Switch lock Defect
Step Action Value (s) Yes No
1 W as the Antitheft System Check performed?
— Go to Step 2 Go to
antitheft
System Check
2 Recheck the DTC.
1. Key position is “OFF”.
2. Install the Tech-2 on vehicle.
3. Key position is “ON”.
4. Check the DTC on the Tech-2.
Is DTC 42 stored? — Go to Step 3 Refer to
Diagnostic Aids
3 Check the driver door lock function.
1. Key position is “OFF”.
2. Install the Tech-2 on vehicle.
3. Key position is “OFF”.
4. Observe to display door lock switch data with the Tech-2.
5. Turn ON by driver door lock.
Does the Tech-2 display Closed? — Go to Step 4 Go to Step 5
4
1. Key position is “OFF”.
2. Observe to display door lock data with the Tech-2.
3. Turn OFF by driver door lock.
Does the Tech-2 display Open ? — Refer to
Diagnostic Aids ,
and then go to step 5 Go to Step 5
5
1. Check the driver door lock switch circuit for an
open, short to ground, or short to voltage.
Also, check the door lock connector for damage.
2. If a problem found, repair as necessary.
W as the problem found? — Verify repair Go to Step 6
6
1. Repair or replace the driver door lock switch.
2. Check the DTC on the Tech-2.
Is DTC 42 stored? — Go to
Step 7 Verify repair
7 Replace the antitheft control unit (ACU).
IMPORTANT: The replacement ACU must be
programmed the security data by the Tech-2.
W as the action complete? — Verify repair —


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TO MODEL INDEX
ISUZU KB P190 2007