Isuzu 4HL1 Workshop Manual page 250

1A-248 Engine Control System
Step
Review the DTC.
1. Certainly
connector.
8
2. Using Tech 2, clear the DTC.
3. Perform test run and review the DTC.
Is DTC417 detected?
1. Replace the ECM.
IMPORTANT:
If necessary (for the vehicle equipped with
9
idle stop function), input the number of
startups to the replacing ECM.
Is the action complete?
Check DTC417 will not be set again.
1. Using Tech 2, clear the DTC.
10
2. Perform test run and review the DTC.
Is DTC417 detected?
Action
connect the relay
Value(s)
and
—
—
—
Yes
Go to Step 8 Diagnostic Aids
Verify repair and
go to Step 10
Refer to
Diagnostic Aids
and go to Step 2
No
Refer to
—
Repair is
complete