door lock ISUZU KB P190 2007 Workshop Manual PDF

ANTITHEFT SYSTEM 11B-37
Diagnostic Trouble Code (DTC) List For Antitheft
DTC Description
13 Security code not yet programmed
14 No remote key programmed
16 Door lock actuators short circuit to ground
20 Broken wire to door lock actuators
21 Remote key 1 with random code out of capture range
22 Remote key 2 with random code out of capture range
23 Remote key 3 with random code out of capture range
24 Remote key 4 with random code out of capture range
25 Remote key 5 with random code out of capture range
28 Input immobilizer short circuit to ground
29 Broken wire to immobilizer
31 Actuator driver door defect
32 Actuator passenger door defect
36 Broken wire to driver door
37 Broken wire to passenger door
41 Driver door switch unlock defect
42 Driver door switch lock defect
43 Driver door switch dead lock defect
44 Passenger door switch lock defect
45 Passenger door switch unlock defect
47 Battery voltage for door lock actuators is missing
50 A/D converter defect or battery voltage less than 9 volt
51 EEPROM defect
52 EEPROM not programmed by ISUZU
55 Control unit defect
123 Output flasher short circuit to ground or broken wire
125 Output alarm horn broken wire



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ISUZU KB P190 2007

11B-42 ANTITHEFT SYSTEM
DTC 16 Door Lock Actuators Short Circuit to Ground
Step Action Value (s) Yes No
1 W as the Antitheft System Check performed?
— Go to Step 2 Go to
antitheft
System Check
2 Check the door lock actuators circuit.
1. Key position is “OFF”.
2. Disconnect the antitheft control unit (ACU).
3. Check the door lock actuator circuit for short to ground.
If the problem found, repair as necessary.
W as a problem found? — Verify repair Go to Step 3
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 the Tech-2.
Is DTC 16 stored? — Go to Step 4 Verify repair
4 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-43
DTC 20 Broken wire to door lock actuators
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 20 stored? — Go to Step 3 Refer to
Diagnostic Aids
3 Check the door lock actuator circuit.
1. Key position is “OFF”.
2. Disconnect the antitheft control unit (ACU).
3. Disconnect the door lock motor.
4. Check the antitheft/door lock motor line circuit for an open, short to ground.
Also, check the ignition feed circuits for an open or short to ground and the ACU ground circuit for
an open.
W as a problem found? — Go to Step 4 Go to Step 5
4 Repair or replace the antitheft/door lock motor circuit.
W as the action complete? — Verify repair —
5 Replace the antitheft control unit (ACU).
IMPORTANT: The replacement ACU must be
programmed the security data by the tech2.
W as the action complete? — Verify repair —


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ISUZU KB P190 2007

ANTITHEFT SYSTEM 11B-49
DTC 28 Input Immobilizer short circuit to ground
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 28 stored? — Go to Step 3 Refer to
Diagnostic Aids
3 Check the driver door locking motor function.
line circuit.
1. Key position is “OFF”.
2. Install the Tech-2 on vehicle.
3. Key position is “ON”.
4. Check the antitheft/Immobilizer communication line circuit for short to voltage, short to ground.
Also, check the ICU and ACU ignition feed circuits for an open or short to ground and the ICU and
ACU ground circuit for an open.
W as a problem found? — Go to Step 4 Go to Step 5
4 Repair or replace the antitheft/Immobilizer
communication line circuit.
W as the action complete? — Verify repair —
5 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-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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ISUZU KB P190 2007

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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TO MODEL INDEX
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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TO MODEL INDEX
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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TO MODEL INDEX
ISUZU KB P190 2007

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 —


BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007