Isuzu N 2008 Series Workshop Manual page 286

Step
1. Inspect the following conditions:
• Misrouted vacuum hoses
• Turbocharger nozzle control solenoid
valve for a stuck open
11
• Turbocharger nozzle control solenoid
valve circuit is short to ground
2. Repair or replace as necessary.
Did you find and correct the condition?
Replace the vacuum pressure sensor. Refer to
Vacuum Pressure Sensor in Section 1J Induction.
12
Did you complete the replacement?
Important:
programmed and learned.
13
Replace the ECM. Refer to ECM Replacement.
Did you complete the replacement?
1. Reconnect
harness connector(s).
2. Clear the DTCs with a scan tool.
3. Turn OFF the ignition for 30 seconds.
4. Start the engine.
14
5. Operate the vehicle within the Conditions for
Running the DTC. You may also operate the
vehicle
observed from the Freeze Frame/ Failure
Records.
Did the DTC fail this ignition?
Observe the DTC Information with a scan tool.
15
Are there any DTCs that you have not diagnosed?
Circuit/ System Testing DTC P2528
Step
Did you perform the Diagnostic System Check -
1 Engine Controls?
1. Install a scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine.
2
4. Monitor the DTC Information with a scan tool.
Does the DTC fail this ignition?
Monitor the DTC Information with a scan tool.
3
Is DTC P0697 also set?
1. Turn OFF the ignition.
2. Disconnect the vacuum pressure sensor
harness connector.
4
3. Turn ON the ignition, with the engine OFF.
4. Monitor the DTC Information with a scan tool.
Is DTC P2527 set, but not DTC P2528?
Action
Replacement ECM
all previously disconnected
within the conditions
Action
Engine Control System (4JJ1)
Value(s)
—
—
must be
—
—
that you
—
Value(s)
—
—
—
—
Yes
Go to Step 14
Go to Step 14
Go to Step 14
Go to Step 3
Go to DTC List
Yes
Go to Diagnostic
System Check -
Go to Step 2 Engine Controls
Go to Diagnostic
Go to Step 3
Go to Step 4
Go to DTC P0697
1A-283
No
Go to Step 12
—
—
Go to Step 15
System OK
No
Aids
Go to Step 5
Go to Step 6