Isuzu N 2008 Series User Manual

Engine Control System (4JJ1) 1A-301
6
1. Perform the Intake Throttle Solenoid Control
with a scan tool several times.
2. Command the Desired Intake Throttle Position
Increase and Decrease while observing the
Intake Throttle Position.
Does the Intake Throttle Position parameter follow
within the specified value quick enough?
± 5%
System OK Go to Step 9
7
1. Remove the EGR valve assembly from the
engine.
2. Inspect the EGR valve for the following
conditions:
• Restricted EGR valve by foreign
materials
• Excessive deposits at valve
• Bent valve shaft
3. Repair or replace as necessary.
Did you find and correct the condition?
—
Go to Step 13 Go to Step 8
8
1. Turn OFF the ignition.
2. Disconnect the EGR valve harness connector.
3. Inspect for an intermittent, for poor
connections and corrosion at the harness
connector of the EGR valve (pins 1, 2, 3, 4, 5,
6, 7 and 8 of E15).
4. Disconnect the ECM harness connector.
5. Inspect for an intermittent, for poor
connections and corrosion at the harness
connector of the ECM (pins 87, 93, 94, 99,
101, 103, 110 and 111 of E12).
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?
—
Go to Step 13 Go to Step 11
9
1. Remove the intake duct that is connected to
the intake throttle valve.
2. Inspect the intake throttle valve for the
following conditions:
• Restricted intake throttle valve by foreign
materials
• Excessive deposits at throttle bore
• Bent butterfly valve
Notice: Replace the intake throttle valve if
there is any sticking
3. Repair or replace as necessary.
Did you find and correct the condition?
—
Go to Step 13 Go to Step 10
Step Action Value(s) Yes No
LG4JJED-WE-0871.book 301 ページ ２００８年４月４日 金曜日 午前９時６分

Isuzu N 2008 Series Specifications

General

Brand	Isuzu
Model	N 2008 Series
Category	Control Systems
Language	English