Isuzu KB P190. Service manual — part 1469
IMMOBILIZER CONTROL SYSTEM (4JK1/4JJ1/HFV6) 11A-25
6
Important: Replacement transponder key must be
programmed.
Replace the transponder key that indicates No
Transponder Key at Step 4. Refer to Resetting and
Programming Guidelines in this section.
Did you complete the replacement?
—
Go to Step 8
—
7
Important: Replacement ICU must be
programmed.
Replace the ICU. Refer to ICU Replacement.
Did you complete the replacement?
—
Go to Step 8
—
8
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 2
Go to Step 9
9
Observe the DTC Information with a scan tool.
Are there any DTCs that you have not diagnosed?
—
Go to DTC List
System OK
Step
Action
Value(s)
Yes
No
11A-26 IMMOBILIZER CONTROL SYSTEM (4JK1/4JJ1/HFV6)
DTC B0004
Circuit Description
An antenna coil is a part of the ICU and it is located
around steering key lock cylinder. An antenna coil is
energized when the ICU is performing an
authentication of the transponder key. If the ICU
detects an open circuit or short circuit on the antenna
coil circuit, this DTC will set.
Condition for Running the DTC
• The ignition switch is ON.
Condition for Setting the DTC
• The ICU detects an open circuit or short circuit on
the antenna coil circuit.
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
• Improper installation of ICU will set this DTC.
Circuit/ System Testing DTC B0004
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.
Inspect the ICU for the following conditions:
• Physical damage of ICU
• Improper installation of ICU
2.
Repair or replace as necessary.
Did you find and correct the condition?
—
Go to Step 4
Go to Step 3
3
Important: Replacement ICU must be
programmed.
Replace the ICU. Refer to ICU Replacement.
Did you complete the replacement?
—
Go to Step 5
—
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 2
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-27
DTC B0007
Circuit Description
When the transponder key authentication is completed,
the ICU begins authentication of the ECM. The ECM
transmits a specific request signal to the ICU and the
ICU sends back a response signal to the ECM. Both
communication signals are carried out via a controller
area network (CAN) communication bus. If the ICU
does not detect a request signal from the ECM, this
DTC will set.
Condition for Setting the DTC
• The ICU does not receive a request signal from the
ECM.
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.
• If the ignition switch is cycled (ON > OFF > ON)
rapidly, this DTC may set but engine starts. This is
normal and a current DTC clears once ignition
cycle has been normally occurred.
Circuit/ System Testing DTC B0007
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.
Select the Engine in the system selection
menu.
5.
Attempt to communicate with the ECM via the
Engine Data table.
Does the scan tool communicate with the ECM?
—
Go to Step 3
Go to Diagnostic
System Check -
Engine Controls
3
Monitor the ECM DTC Information with a scan tool.
Is DTC U0001 set?
—
Go to DTC U0001 in
Engine Control
Section
Go to Step 4
4
Refer to Scan Tool Does Not Communicate with
The CAN Device in this section.
Did you complete the action?
—
Go to Step 5
—
5
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 2
Go to Step 6
6
Observe the DTC Information with a scan tool.
Are there any DTCs that you have not diagnosed?
—
Go to DTC List
System OK
11A-28 IMMOBILIZER CONTROL SYSTEM (4JK1/4JJ1/HFV6)
DTC B0008
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 receives a wrong 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 receives a wrong response signal from
the transponder key.
Action Taken When the DTC Sets
• The engine will not start 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
• If the transponder key or ICU is transferred
(swapped) from another vehicle, this DTC will set.
Circuit/ System Testing DTC B0008
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 B0009 also set?
—
Go to DTC B0009
Go to Step 3
3
Inspect all programmed transponder keys while
observing the Transponder Key parameter with a
scan tool.
Is there a transponder key that indicates Invalid
when ignition switch is ON?
—
Go to Step 4
Go to Diagnostic
Aids
4
Does only specific transponder key indicate
Invalid?
—
Go to Step 5
Go to Step 6
5
Important: Replacement transponder key must be
programmed.
Replace the transponder key that indicates Invalid
at Step 3. Refer to Resetting and Programming
Guidelines in this section.
Did you complete the replacement?
—
Go to Step 7
—
6
Important: Replacement ICU must be
programmed.
Replace the ICU. Refer to ICU Replacement.
Did you complete the replacement?
—
Go to Step 7
—
7
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 2
Go to Step 8
8
Observe the DTC Information with a scan tool.
Are there any DTCs that you have not diagnosed?
—
Go to DTC List
System OK
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