2007 ISUZU KB P190 Workshop Repair Manual

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Page 5929 of 6020

ISUZU KB P190 2007 Workshop Repair Manual IMMOBILIZER SYSTEM (C24SE, 4JA1-T) 11A-31
Step Action Value(s) Yes No
10 Review and record for scan tool Failure Records data
and DTCs.
W as the action complete? 
Go to Step 11 
1

IMMOBILIZER SYSTEM (C24SE, 4JA1-T) 11A-31
Step Action Value(s) Yes No
10 Review and record for scan tool Failure Records data
and DTCs.
W as the action complete? 
Go to Step 11 
11 Following the DTC is stored.
Are there DTC B0001 or B0055 stored?
Go to applicable
DTC table after
Go to Step 12 Go to
Step 12
12 Clear the DTCs by "Clear the Information "with scan
tool.
Did the DTCs Cleared? 
Go to Step 12 
13 Select "Display DTCs" with the scan tool.
Are any DTCs stored? 
Go to applicable
DTC table Go to
Step 14
14 1. Key position is "ON," engine "OFF."
2. Observe the check engine lamp.
Note: If a key switch is turned ON, check engine lamp
will turn on and a check engine lamp will be turned off
after a few seconds.
Is the check engine lamp "flash"? 
Go to Step 15 Go to Step 20
15 Check the engine control system.
If a problem is found, repair as necessary.
(Refer to section 6E: system check and DTCs)
IMPORTANT: The replacement ECM must be
programmed the immobilizer data by scan tool.
(Except 4JA1-L Engine)
W as the action complete? 
Go to Step 16 
16 Check the key.
Is a key peculiar to a vehicle? 
Go to Step 18 Go to Step 17
17 Change into a peculiar key.
IMPORTANT: If replace the key, after replace lock
cylinders, perform the following below the items.
• Replace the keys and key cylinders.
• Program the immobilizer system.
(Refer to "Important information on Programming")
W as the action complete? 
Go to Step 18 
18 Check the immobilizer programming functions.
• Immobilizer control unit (ICU).
• Engine control module (ECM).
• Transponder (Key).
If a problem is found, repair as necessary.
(Refer to "Important information on Programming")
W as the action complete? 
Go to Step 19 
19 Operate the DTCs by "Clear the Information" with
scan tool.
W as the action complete? 
Go to Step 20 
20 Attempt to start the engine.
Did the engine start? 
System OK Refer to
Diagnostic Aids

BACK TO CHAPTER INDEX TO MODEL INDEX
ISUZU KB P190 2007

Page 5930 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 11A-32 IMMOBILIZER SYSTEM (C24SE, 4JA1-T)
NO IMMOBILIZER WARNING LAMP
Step Action Value(s) Yes No
1 Check the meter fuse for the instrument cluster
ignition feed circuit.
Is the fuse norm

Page 5931 of 6020

ISUZU KB P190 2007 Workshop Repair Manual IMMOBILIZER SYSTEM (C24SE, 4JA1-T) 11A-33
CHECK IMMOBILIZER WARNING LAMP ON STEADY
Step Action Value(s) Yes No
1 1. Key position is "OFF".
2. Disconnect the immobilizer control unit (ICU).

Page 5932 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 11A-34 IMMOBILIZER SYSTEM (C24SE, 4JA1-T)
B0001 REPLACE ELECTRONIC CONTROL UNIT (ECU) (IMMOBILIZER FAULT)
Step Action Value(s) Yes No
1
W as the "Immobilizer System Check" performed? 

Page 5933 of 6020

ISUZU KB P190 2007 Workshop Repair Manual IMMOBILIZER SYSTEM (C24SE, 4JA1-T) 11A-35
B0002 IMMOBILIZER NOT PROGRAMMED
Step Action Value(s) Yes No
1 W as the "Immobilizer System Check" performed?
 Go to Step 2 Go to Immobilizer
Syste

Page 5934 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 11A-36 IMMOBILIZER SYSTEM (C24SE, 4JA1-T)
B0003 TRANSPONDER KEY PROBLEM
Step Action Value(s) Yes No
1
W as the "Immobilizer System Check" performed? 
Go to Step 2 Go to Immobilizer
Sy

11A-36 IMMOBILIZER SYSTEM (C24SE, 4JA1-T)
B0003 TRANSPONDER KEY PROBLEM
Step Action Value(s) Yes No
1
W as the "Immobilizer System Check" performed? 
Go to Step 2 Go to Immobilizer
System Check
2 Check the key.
Is a key peculiar to a vehicle? 
Go to Step 3 Refer to
Diagnostic Aids
3 Check the immobilizer programming functions.
• All transponder (Key).
If a problem is found, repair as necessary.
(Refer to "Important information on Programming")
W as the action complete? 
Go to Step 4 Go to Step 5
4 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 scan tool.
Is DTC B0003 stored? 
Go to Step 5 Verify repair
5 Recheck the DTC.
1. Non-OEM parts switch is "OFF" or remove the Non- OEM parts.
2. Remove the accessory and another key from key.
3. Move the vehicle to a new location.
4. Key position is “OFF” and keep the position for more than 30 seconds.
5. Key position is “ON”.
6. Check the DTC on scan tool.
Is DTC B0003 stored? 
Go to Step 6 Verify repair
6 Check the immobilizer coil (antenna) circuit.
1. Key position is “OFF”.
2. Disconnect the immobilizer control unit (ICU).
(immobilizer coil circuit : 3 pin connector)
3. Check the immobilizer coil circuit for an open, short to ground, or short to voltage.
Also, check the ICU ignition feed circuit for an open or
short to ground and the ICU ground circuit for an open.
W as a problem found? 
Go to Step 7 Go to Step 8
7 Repair or replace the immobilizer coil (antenna) circuit.
W as the action complete? 
Verify repair 
8 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 scan tool.
Is DTC B0003 stored? 
Go to Step 9 Verify repair

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TO MODEL INDEX
ISUZU KB P190 2007

Page 5935 of 6020

ISUZU KB P190 2007 Workshop Repair Manual IMMOBILIZER SYSTEM (C24SE, 4JA1-T) 11A-37
Step Action Value(s) Yes No
9 Replace the immobilizer control unit (ICU).
IMPORTANT: The replacement ICU must be
programmed the security data by scan

Page 5936 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 11A-38 IMMOBILIZER SYSTEM (C24SE, 4JA1-T)
B0004 IMMOBILIZER COIL CIRCUIT (ANTENNA COIL FAULT)
Step Action Value(s) Yes No
1
W as the "Immobilizer System Check" performed? 
Go to Step 2

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