key ISUZU TF SERIES 2004 Workshop Manual

11B – 48 ANTITHEFT SYSTEM
DTC 28 Input Immobilizer short circuit to ground
Step Action Value (s) Yes No
1
2
3
4
5Was the Antitheft System Check
performed?
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?
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 communi-
cation 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.
Was a problem found?
Repair or replace the antitheft/Immobilizer
communication line circuit.
Was the action complete?
Replace the antitheft control unit (ACU).
IMPORTANT: The replacement ACU must be
programmed the security data by the Tech-2.
Was the action complete?—
—
—
—
—Go to Step 2
Go to Step 3
Go to Step 4
Verify repair
Verify repairGo to antitheft
System Check
Refer to
Diagnostic Aids
Go to Step 5
—
—

ANTITHEFT SYSTEM 11B – 49
DTC 29 Broken Wire To Immobilizer
Step Action Value (s) Yes No
1
2
3
4
5Was the Antitheft System Check
performed?
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 the Tech-2.
Is DTC 29 stored?
Check the antitheft/immobilizer communication
line circuit.
1. Key position is “OFF”.
2. Disconnect the antitheft control unit (ACU).
3. Disconnect the immobilizer control unit (ICU).
4. Check the antitheft/Immobilizer communi-
cation line circuit for an open, 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.
Was a problem found?
Repair or replace the antitheft/Immobilizer
communication line circuit.
Was the action complete?
Replace the antitheft control unit (ACU).
IMPORTANT: The replacement ACU must be
programmed the security data by the Tech-2.
Was the action complete?—
—
—
—
—Go to Step 2
Go to Step 3
Go to Step 4
Verify repair
Verify repairGo to antitheft
System Check
Refer to
Diagnostic Aids
Go to Step 5
—
—

11B – 50 ANTITHEFT SYSTEM
DTC 31 Actuator Driver Door Defect
Step Action Value (s) Yes No
1
2
3
4
5
6
7Was the Antitheft System Check"
performed?
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?
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?
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?
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.
Was the problem found?
1. Repair or replace the driver door lockoing
motor.
2. Check the DTC on the Tech-2.
Is DTC 31 stored?
Replace the antitheft control unit (ACU).
IMPORTANT:The replacement ACU must be
programmed the security data by the Tech-2.
Was the action complete?—
—
—
—
—
—
—Go to Step 2
Go to Step 3
Go to Step 4
Refer to
Diagnostic Aids,
and then go to
step 5
Verify repair
Go to Step 7
Verify repairGo to antitheft
System Check
Refer to
Diagnostic Aids
Go to Step 5
Go to Step 5
Go to Step 6
Verify repair
—

ANTITHEFT SYSTEM 11B – 51
DTC 32 Actuator Passenger Door Defect
Step Action Value (s) Yes No
1
2
3
4
5
6
7Was the Antitheft System Check
performed?
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?
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 valtage?
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 valtage?
1. Check the passenger doorlocking 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.
Was the problem found?
1. Repair or replace the passenger door locking
motor.
2. Check the DTC on the Tech-2.
Is DTC 32 stored?
Replace the antitheft control unit (ACU).
IMPORTANT: The replacement ACU must be
programmed the security data by the Tech-2.
Was the action complete?—
—
—
—
—
—
—Go to Step 2
Go to Step 3
Go to Step 4
Refer to
Diagnostic Aids,
and then go to
step 5
Verify repair
Go to Step 7
Verify repairGo to antitheft
System Check
Refer to
Diagnostic Aids
Go to Step 5
Go to Step 5
Go to Step 6
Verify repair
—

11B – 52 ANTITHEFT SYSTEM
DTC 36 Broken Wire To Driver Door
Step Action Value (s) Yes No
1
2
3
4
5
6
7Was the Antitheft System Check"
performed?
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?
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?
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 ?
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.
Was the problem found?
1. Repair or replace the driver door lock.
2. Check the DTC on the Tech-2.
Is DTC 36 stored?
Replace the antitheft control unit (ACU).
IMPORTANT:The replacement ACU must be
programmed the security data by the Tech-2.
Was the action complete?—
—
—
—
—
—
—Go to Step 2
Go to Step 3
Go to Step 4
Refer to
Diagnostic Aids,
and then go to
step 5
Verify repair
Go to Step 7
Verify repairGo to antitheft
System Check
Refer to
Diagnostic Aids
Go to Step 5
Go to Step 5
Go to Step 6
Verify repair
—

ANTITHEFT SYSTEM 11B – 53
DTC 37 Broken Wire To Passenger Door
Step Action Value (s) Yes No
1
2
3
4
5
6
7Was the Antitheft System Check
performed?
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?
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 ?
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 ?
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.
Was the problem found?
1. Repair or replace the passenger door lock.
2. Check the DTC on the Tech-2.
Is DTC 37 stored?
Replace the antitheft control unit (ACU).
IMPORTANT:The replacement ACU must be
programmed the security data by the Tech-2.
Was the action complete?—
—
—
—
—
—
—Go to Step 2
Go to Step 3
Go to Step 4
Refer to
Diagnostic Aids,
and then go to
step 5
Verify repair
Go to Step 7
Verify repairGo to antitheft
System Check
Refer to
Diagnostic Aids
Go to Step 5
Go to Step 5
Go to Step 6
Verify repair
—

11B – 54 ANTITHEFT SYSTEM
DTC 41 Driver Door Lock Switch Unlock Defect
Step Action Value (s) Yes No
1
2
3
4
5
6
7Was the Antitheft System Check"
performed?
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?
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?
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 ?
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.
Was the problem found?
1. Repair or replace the driver door lock switch.
2. Check the DTC on the Tech-2.
Is DTC 41 stored?
Replace the antitheft control unit (ACU).
IMPORTANT:The replacement ACU must be
programmed the security data by the Tech-2.
Was the action complete?—
—
—
—
—
—
—Go to Step 2
Go to Step 3
Go to Step 4
Refer to
Diagnostic Aids,
and then go to
step 5
Verify repair
Go to Step 7
Verify repairGo to antitheft
System Check
Refer to
Diagnostic Aids
Go to Step 5
Go to Step 5
Go to Step 6
Verify repair
—

ANTITHEFT SYSTEM 11B – 55
DTC 42 Driver Door Lock Switch lock Defect
Step Action Value (s) Yes No
1
2
3
4
5
6
7Was the Antitheft System Check
performed?
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?
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?
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 ?
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.
Was the problem found?
1. Repair or replace the driver door lock switch.
2. Check the DTC on the Tech-2.
Is DTC 42 stored?
Replace the antitheft control unit (ACU).
IMPORTANT:The replacement ACU must be
programmed the security data by the Tech-2.
Was the action complete?—
—
—
—
—
—
—Go to Step 2
Go to Step 3
Go to Step 4
Refer to
Diagnostic Aids,
and then go to
step 5
Verify repair
Go to Step 7
Verify repairGo to antitheft
System Check
Refer to
Diagnostic Aids
Go to Step 5
Go to Step 5
Go to Step 6
Verify repair
—

11B – 56 ANTITHEFT SYSTEM
DTC 43 Driver Door Lock Switch Super lock Defect
Step Action Value (s) Yes No
1
2
3
4
5
6
7Was the Antitheft System Check"
performed?
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 43 stored?
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?
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?
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.
Was the problem found?
1. Repair or replace the driver door lock switch.
2. Check the DTC on the Tech-2.
Is DTC 43 stored?
Replace the antitheft control unit (ACU).
IMPORTANT:The replacement ACU must be
programmed the security data by the Tech-2.
Was the action complete?—
—
—
—
—
—
—Go to Step 2
Go to Step 3
Go to Step 4
Refer to
Diagnostic Aids,
and then go to
step 5
Verify repair
Go to Step 7
Verify repairGo to antitheft
System Check
Refer to
Diagnostic Aids
Go to Step 5
Go to Step 5
Go to Step 6
Verify repair
—

ANTITHEFT SYSTEM 11B – 57
DTC 44 Passenger Door Lock Switch lock Defect
Step Action Value (s) Yes No
1
2
3
4
5
6
7Was the Antitheft System Check
performed?
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 44 stored?
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 switch data with
the Tech-2.
5. Turn ON by passenger door lock.
Does the Tech-2 display Closed?
1. Key position is “OFF”.
2. Observe to display door lock data with the
Tech-2.
3. Turn OFF by passenger door lock.
Does the Tech-2 display Open ?
1. Check the passenger 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.
Was the problem found?
1. Repair or replace the passenger door lock
switch.
2. Check the DTC on the Tech-2.
Is DTC 44 stored?
Replace the antitheft control unit (ACU).
IMPORTANT:The replacement ACU must be
programmed the security data by the Tech-2.
Was the action complete?—
—
—
—
—
—
—Go to Step 2
Go to Step 3
Go to Step 4
Refer to
Diagnostic Aids,
and then go to
step 5
Verify repair
Go to Step 7
Verify repairGo to antitheft
System Check
Refer to
Diagnostic Aids
Go to Step 5
Go to Step 5
Go to Step 6
Verify repair
—