Isuzu 4HL1 Workshop Manual page 145

Step
Check DTC44 will not be set again.
1. Using Tech 2, clear the DTC.
19
2. Perform test run and review the DTC.
Is DTC44 detected?
EGR Valve Description
1
Legend
1. Exhaust path
2. Valve
3. Motor (–)
4. Sensor signal
Action
2
Engine Control System 1A-143
Value(s) Yes
—
Refer to
Diagnostic Aids
and go to Step 2
8
5. Sensor ground
6. Sensor power
7. Motor (+)
8. DC motor
No
Repair is
complete
3
4
5
6
7
LNW21ASF002201