Isuzu 2008MY N Series Workshop Manual page 92

Step
1. Turn OFF the ignition.
2. Disconnect the ECM harness connector.
3. Inspect for an intermittent and for poor
connections at the harness connector of the
12
ECM (pins 89, 97, 105 and 113 of E-12).
4. Repair the connection(s) as necessary.
Does the test lamp illuminate then go out?
Replace the FRP regulator. Refer to Fuel Supply
Pump in Section 1D Engine Fuel.
13
Did you complete the replacement?
Important: Replacement
programmed and learned.
14
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.
15
5. Operate the vehicle within the Conditions for
Running the DTC. You may also operate the
vehicle within
observed from the Freeze Frame/ Failure
Records.
Did the DTC fail this ignition?
Observe the DTC Information with a scan tool.
16
Are there any DTCs that you have not
diagnosed?
Action
ECM must
all previously disconnected
the conditions that
Engine Control System (4HK1)
Value(s)
—
—
be
—
—
you
—
Yes
Go to Step 15 Go to Step 14
Go to Step 15
Go to Step 15
Go to Step 3 Go to Step 16
Go to DTC List
1A-89
No
—
—
System OK