ECU ISUZU TF SERIES 2004 Workshop Manual

11B – 34 ANTITHEFT SYSTEM
Tech-2 Data List
No. Streings 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 Doorlock 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

11B – 36 ANTITHEFT SYSTEM
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 immobiliser short circuit to ground
29 Broken wire to immobiliser
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 E E P ROM defect
52 E E P ROM not programmed by ISUZU
55 Control unit defect
123 Output flasher short circuit to grpund or broken wire
125 Output alarm horn broken wire

ANTITHEFT SYSTEM 11B – 41
DTC 16 Door Lock Actuators Short Circuit to Ground
Step Action Value (s) Yes No
1
2
3
4Was the Antitheft System Check
performed?
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.
Was a problem found?
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?
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
Verify repair
Go to Step 5
Verify repairGo to antitheft
System Check
Go to Step 3
Verify repair
—

11B – 42 ANTITHEFT SYSTEM
DTC 20 Broken wire to door lock actuators
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 20 stored?
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.
Was a problem found?
Repair or replace the antitheft/door lock motor
circuit.
Was the action complete?
Replace the antitheft control unit (ACU).
IMPORTANT: The replacement ACU must be
programmed the security data by the tech2.
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 – 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
—