2007 ISUZU KB P190 Circuit

ANTITHEFT SYSTEM 11B-61
DTC 50 A/D Converter Defect Or Battery Voltage Less Than 9 Volt
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 50 stored? — Go to Step 3 Refer to
Diagnostic Aids
3 Check the antilock system voltage.
1. Key position is “OFF”.
2. Install the Tech-2 on vehicle.
3. Key position is “ON”.
4. Observe to display system voltage data with the Tech-2.
Is the voltage near the specified value ? — Go to Step 6 Go to Step 4
4
1. Key position is “OFF”.
2. Check the battery voltage.
3. If a problem found, repair as necessary. (Chage battery)
W as the problem found? — Verify repair Go to Step 5
5
1. Check the ignition feed circuit for an open, short to
ground.
Also, check the ACU ground circuit for damage.
2. If a problem found, repair as necessary.
W as the problem found? — Verify repair Refer to
Diagnostic Aids
6 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-65
DTC 123 Output flasher short circuit to ground or broken wire
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 tech2 on vehicle.
3. Key position is “ON”.
4. Check the DTC on the tech2.
Is DTC 123 stored? — Go to Step 3 Refer to
Diagnostic Aids
3 1. Check the flasher circuit for an open, short to
ground, or short to voltage.
Also, check the flasher connector for damage.
2. If a problem found, repair as necessary.
W as the problem found? — Verify repair Go to Step 4
4 Check the flasher function.
1. Key position is “OFF”.
2. Connect a jumper wire between ACU terminal 28 and body ground.
3. Key position is “ON”.
4. Observe to operate flasher lamp.
If the problem found about the flasher lamp circuit,
repair as necessary.
W as the problem found? — Verify repair Go to Step 5
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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TO MODEL INDEX
ISUZU KB P190 2007

11B-66 ANTITHEFT SYSTEM
DTC 125 Output Alarm Horn Broken Wire
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 125 stored? — Go to Step 3 Refer to
Diagnostic Aids
3 1. Check the alarm horn circuit for an open, short to
ground, or short to voltage.
Also, check the alarm horn connector for damage.
2. If a problem found, repair as necessary.
W as the problem found? — Verify repair Go to Step 4
4 Check the alarm horn function.
1. Key position is “OFF”.
2. Connect a jumper wire between ACU terminal 5 and body ground.
3. Key position is “ON”.
4. Observe to operate sound with the alarm horn.
If the problem found about the alarm horn, replace as
necessary.
W as the problem found? — Verify repair Go to Step 5
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 —


BACK TO CHAPTER INDEX TO MODEL INDEX
ISUZU KB P190 2007