Isuzu N 2008 Series Workshop Manual page 166

Step
1. Inspect for an intermittent and for poor
connections at the harness connector of the
EGR valve (pins 1, 2, 3, 4 and 5 of E15)
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2. Repair the connection(s) as necessary.
Did you find and correct the condition?
1. Test the solenoid circuits between the ECM
(pins 103, 110 and 111 of E12) and the EGR
valve (pins 6, 7 and 8 of E15) for a short to the
12 EGR position sensor circuit(s).
2. Repair the circuit(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 poor
connections at the harness connector of the
13
ECM (pins 87, 93, 94, 99 and 101 of E12).
4. Repair the connection(s) as necessary.
Did you find and correct the condition?
Replace the EGR valve. Refer to EGR Valve and
EGR Cooler in Section 1F Emission Control.
14
Did you complete the replacement?
Important: Replacement
programmed and learned.
15
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.
Notice: A history DTC will not clear. (Euro 4
specification)
3. Turn OFF the ignition for 30 seconds.
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4. Start the engine.
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.
17
Are there any DTCs that you have not diagnosed?
Action
ECM must
all previously disconnected
the conditions that
Engine Control System (4JJ1)
Value(s)
—
—
—
—
be
—
—
you
—
Yes
Go to Step 16 Go to Step 12
Go to Step 16 Go to Step 14
Go to Step 16 Go to Step 15
Go to Step 16
Go to Step 16
Go to Step 3 Go to Step 17
Go to DTC List
1A-163
No
System OK