Isuzu 4JA1 Workshop Manual page 392

6E-138 Engine Control System (4JH1)
Step
15 1. Reconnect all previously disconnected fuse or
harness connector(s).
2. Clear the DTCs with the scan tool.
3. Turn OFF the ignition for 30 seconds.
4. Start the engine.
5. Monitor the DTC Information with the scan tool.
Did the DTC fail this ignition?
16 Observe the DTC Information with the scan tool.
Are there any DTCs that you have not diagnosed?
Action Value(s) Yes

Go to Step 3
Go to Diagnostic

Trouble Code (DTC)
List
No
Go to Step 16
System OK