October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Engine Controls - Tests W/Codes - 3.0L: Summary

If no service codes (or pass code 11-1-11) are present, and a driveability problem still exists, proceed to H - "Engine Type" TESTS W/O CODES article for diagnosis by symptom (i.e. ROUGH IDLE, NO START, etc.), or intermittent diagnosis procedures.