Isuzu KB P190. Manual — part 1468
IMMOBILIZER CONTROL SYSTEM (4JK1/4JJ1/HFV6) 11A-21
Diagnostic Trouble Code (DTC) List
DTC
DTC Descriptor
B0001
Replace Electronic Control Unit (ECU)
B0002
Immobilizer Not Programmed
B0003
Transponder Key Problem
B0004
Immobilizer Coil Circuit
B0007
No Engine Request Received
B0008
Wrong Transponder Key
B0009
No Transponder Key Programmed
B0010
Unknown Transponder Key
B0012
Default Transponder Detected
B0013
Previously Erased Transponder
B0014
Secret Key Error
U0100
Lost Communication With ECM
11A-22 IMMOBILIZER CONTROL SYSTEM (4JK1/4JJ1/HFV6)
DTC B0001
Description
This diagnostic applies to internal microprocessor
integrity conditions within the ICU.
Condition for Setting the DTC
• The ECM detects a faulty writing in its internal
electrically erasable & programmable read only
memory (EEPROM).
Action Taken When the DTC Sets
• The engine will fail to run if the fault occurs before
starting the engine.
Condition for Clearing the DTC
• A current DTC clears once ignition cycle has
occurred without the fault recurring.
• A history DTC will clear after 50 consecutive
ignition cycles, if the condition for malfunction is no
longer present.
• Use a scan tool to clear the DTC.
Circuit/ System Testing DTC B0001
Step
Action
Value(s)
Yes
No
1
Did you perform the Diagnostic System Check -
Immobilizer Controls?
—
Go to Step 2
Go to Diagnostic
System Check -
Immobilizer
Controls
2
1.
Install a scan tool.
2.
Turn OFF the ignition for 30 seconds.
3.
Turn ON the ignition, with the engine OFF.
4.
Monitor the DTC Information with a scan tool.
Does the DTC fail this ignition?
—
Go to Step 3
Go to Step 4
3
Important: Replacement ICU must be
programmed.
Replace the ICU. Refer to ICU Replacement.
Did you complete the replacement?
—
Go to Step 4
—
4
1.
Clear the DTCs with a scan tool.
2.
Turn OFF the ignition for 30 seconds.
3.
Turn ON the ignition.
Did the DTC fail this ignition?
—
Go to Step 3
Go to Step 5
5
Observe the DTC Information with a scan tool.
Are there any DTCs that you have not diagnosed?
—
Go to DTC List
System OK
IMMOBILIZER CONTROL SYSTEM (4JK1/4JJ1/HFV6) 11A-23
DTC B0002
Description
The electrically erasable programmable read only
memory (EEPROM) memorizes immobilizer security
code and transponder key information. If the ICU
detects immobilizer security code is not programmed
into the ICU, this DTC will set.
Condition for Setting the DTC
• The ICU detects that the security code is not
programmed.
Action Taken When the DTC Sets
• The engine will fail to run if the fault occurs before
starting the engine.
Condition for Clearing the DTC
• A current DTC clears once ignition cycle has
occurred without the fault recurring.
• A history DTC will clear after 50 consecutive
ignition cycles, if the condition for malfunction is no
longer present.
• Use a scan tool to clear the DTC.
Diagnostic Aids
• Non-programmed ICU sets this DTC.
Circuit/ System Testing DTC B0002
Step
Action
Value(s)
Yes
No
1
Did you perform the Diagnostic System Check -
Immobilizer Controls?
—
Go to Step 2
Go to Diagnostic
System Check -
Immobilizer
Controls
2
1.
Install a scan tool.
2.
Turn OFF the ignition for 30 seconds.
3.
Turn ON the ignition, with the engine OFF.
4.
Monitor the DTC Information with a scan tool.
Does the DTC fail this ignition?
—
Go to Step 3
Go to Diagnostic
Aids
3
Program immobilizer security information into the
ICU. Refer to Resetting and Programming
Guidelines in this section.
Did you complete the programming?
—
Go to Step 4
—
4
1.
Clear the DTCs with a scan tool.
2.
Turn OFF the ignition for 30 seconds.
3.
Turn ON the ignition.
Did the DTC fail this ignition?
—
Go to Step 3
Go to Step 5
5
Observe the DTC Information with a scan tool.
Are there any DTCs that you have not diagnosed?
—
Go to DTC List
System OK
11A-24 IMMOBILIZER CONTROL SYSTEM (4JK1/4JJ1/HFV6)
DTC B0003
Description
When the ignition switch is ON, the ICU begins
authentication of the transponder key in the steering
lock through the antenna coil. Once the ICU transmits a
signal, the transponder must send back a specific
response signal. If the ICU never receives a response
signal from the transponder, this DTC will set.
Condition for Running the DTC
• The ignition switch is ON.
Condition for Setting the DTC
• The ICU does not receive a response signal from
the transponder key.
Action Taken When the DTC Sets
• The engine will fail to run if the fault occurs before
starting the engine.
Condition for Clearing the DTC
• A current DTC clears once ignition cycle has
occurred without the fault recurring.
• A history DTC will clear after 50 consecutive
ignition cycles, if the condition for malfunction is no
longer present.
• Use a scan tool to clear the DTC.
Diagnostic Aids
• Electromagnetic interference may affect
intermittent condition.
• An antenna coil problem may set this DTC.
• Objects that block transponder key in the steering
lock may set this DTC.
• Another key that is attached to the key ring may
affect this DTC to set.
• If the ignition switch has been turned ON without
transponder key this DTC sets.
Circuit/ System Testing DTC B0003
Step
Action
Value(s)
Yes
No
1
Did you perform the Diagnostic System Check -
Immobilizer Controls?
—
Go to Step 2
Go to Diagnostic
System Check -
Immobilizer
Controls
2
1.
Install a scan tool.
2.
Turn OFF the ignition for 30 seconds.
3.
Turn ON the ignition, with the engine OFF.
4.
Monitor the DTC Information with a scan tool.
Is DTC B0004 also set?
—
Go to DTC B0004
Go to Step 3
3
1.
Inspect the transponder key(s) and the ICU for
the following conditions:
• Physical damage of transponder key(s)
or ICU
• Improper installation of ICU
• Improper transponder key
• Objects such as key ring or metal that
touch transponder key or antenna coil
• Objects such as key ring or metal that
cover transponder key or antenna coil
2.
Repair the condition(s) as necessary.
Did you find and correct the condition?
—
Go to Step 8
Go to Step 4
4
Inspect all programmed transponder key while
observing the Transponder Key parameter with a
scan tool.
Is there a transponder key that indicates No
Transponder Key when ignition switch is ON?
—
Go to Step 5
Go to Diagnostic
Aids
5
Does only specific transponder key indicate No
Transponder Key?
—
Go to Step 6
Go to Step 7
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