Engine Controls - Tests W/Codes - 3.0L: Introduction: Notes

If no faults were found while performing BASIC DIAGNOSTIC PROCEDURES, proceed with self-diagnostics. If no Diagnostic Trouble Codes (DTCs) or only pass codes are present after entering self-diagnostics, perform NTC-1A for engine being diagnosed. If after performing appropriate NTC-1A tests, problem is not identified and repaired, proceed to TESTS W/O CODES article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.).