Isuzu 2008MY N Series Workshop Manual page 57

1A-54 Engine Control System (4HK1)
Step
1. Turn OFF the ignition.
2. Reconnect all previously disconnected fuse,
relay or harness connector(s).
3. Turn ON the ignition, with the engine OFF.
18
4. Attempt to establish communication with the
ECM.
Does the scan tool communicate with the
ECM?
Action Value(s) Yes
—
System OK
No
Go to Step 3