Isuzu 2008MY N Series Workshop Manual page 325

1A-322 Engine Control System (4HK1)
Step
1. Turn OFF the ignition.
2. Disconnect the intake throttle valve harness
connector.
3. Inspect
connections and corrosion at the harness
connector of the intake throttle valve (pins 1,
2, 4, 5 and 6 of E-16).
4. Disconnect the ECM harness connector.
10
5. Inspect
connections and corrosion at the harness
connector of the ECM (pins 85, 95, 104, 109
and 112 of E-12).
6. Test for high resistance on each circuit.
7. Repair the connection(s) or circuit(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.
11
Did you complete the replacement?
Replace the intake throttle valve. Refer to Intake
Throttle Valve in Section 1B Engine Mechanical.
12
Did you complete the replacement?
Reconnect all previously disconnected components
or harness connector(s).
13
Did you complete the action?
Action
for an intermittent,
for an intermittent,
Value(s)
for poor
—
for poor
—
—
—
Yes
Go to Step 13 Go to Step 12
Go to Step 13
Go to Step 13
Go to Step 4
No
—
—
—