Engine Controls Self-Diagnostics - Introduction: Introduction: Self-Diagnostics

If no faults were found while performing BASIC TESTING , proceed with self-diagnostics. If no fault codes or only pass codes are present after entering self-diagnostics, proceed to TESTS W/O CODES article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.). After retrieving codes, proceed to appropriate self-diagnostics article

• For Altima, see TESTS W/CODES - TESTING
• For Frontier, see TESTS W/CODES - TESTING
• For Maxima, see TESTS W/CODES - TESTING
• For Pathfinder and Infiniti QX4, see TESTS W/CODES - TESTING
• For Quest, see TESTS W/CODES - TESTING
• For Sentra and 200SX, see TESTS W/CODES - TESTING
• For 240SX, see TESTS W/CODES - TESTING