Isuzu N 2008 Series Workshop Manual page 130

Step
1. Test the control circuit between the ECM (pin
120 of E12) and the cylinder #3 fuel injector
(pin 1 of E7) for an open circuit or high
10 resistance.
2. Repair the connection(s) as necessary.
Did you find and correct the condition?
1. Inspect for an intermittent and for poor
connections at the harness connector of the
cylinder #3 fuel injector (pins 1 and 2 of E7).
11
2. Repair the connection(s) as necessary.
Did you find and correct the condition?
1. Turn OFF the ignition.
2. Disconnect the ECM harness connector.
3. Inspect for an intermittent and for a poor
connection at the harness connector of the
12
ECM (pin 120 of E12).
4. Repair the connection(s) as necessary.
Did you find and correct the condition?
Important: Replacement fuel injector must be
programmed.
Replace the cylinder #3 fuel injector. Refer to
13
Injector in Section 1D Engine Fuel.
Did you complete the replacement?
Important:
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
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?
Circuit/ System Testing DTC P0204
Step
Did you perform the Diagnostic System Check -
1 Engine Controls?
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 15 Go to Step 12
Go to Step 15 Go to Step 13
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
Yes
Go to Diagnostic
System Check -
Go to Step 2 Engine Controls
1A-127
No
—
—
System OK
No