Isuzu 4HL1 Workshop Manual page 219

Step
Check the SCV.
1. At the SCV connector pins, measure the
7
resistance.
Was the resistance within range?
Replace the supply pump (SCV).
8
Is the action complete?
Check DTC247 will not be set again.
1. Restore the vehicle.
2. Bleed the air from the fuel system.
9
3. Using Tech 2, clear the DTC.
4. Perform test run and review the DTC.
Is DTC247 detected?
Review the DTC.
1. Certainly connect the SCV and ECM
connectors.
10
2. Using Tech 2, clear the DTC.
3. Perform test run and review the DTC.
Is DTC247 detected?
1. Replace the ECM.
IMPORTANT:
If necessary (for the vehicle equipped with
11
idle stop function), input the number of
startups to the replacing ECM.
Is the action complete?
Check DTC247 will not be set again.
1. Using Tech 2, clear the DTC.
12
2. Perform test run and review the DTC.
Is DTC247 detected?
Action
Engine Control System 1A-217
Value(s) Yes
8 Ω
Go to Step 10
Verify repair and
—
go to Step 9
—
Refer to
Diagnostic Aids
and go to Step 2
—
Go to Step 11
—
Verify repair and
go to Step 12
—
Refer to
Diagnostic Aids
and go to Step 2
No
Go to Step 8
—
Repair is
complete
Refer to
Diagnostic Aids
—
Repair is
complete