Isuzu 4HL1 Workshop Manual page 191

Step
1. Replace the ECM.
IMPORTANT:
If necessary (for the vehicle equipped with
15
idle stop function), input the number of
startups to the replacing ECM.
Is the action complete?
Check DTC159 will not be set again.
1. Using Tech 2, clear the DTC.
16
2. Perform test run and review the DTC.
Is DTC159 detected?
Injector Description
2
Legend
1. Injector
2. Power supply harness
3. Drive harness
Action
3
1
LNW21ASH010701
Engine Control System 1A-189
Value(s) Yes
—
Verify repair and
go to Step 16
—
Refer to
Diagnostic Aids
and go to Step 2
No
—
Repair is
complete