Engine Controls - Tests W/Codes: Introduction: Notes

If no faults were found while performing the test procedures in either the BASIC TESTING - 4-CYL article (4-cylinder models) or in the BASIC TESTING - V6 article (V6 models), proceed with self-diagnostics. If no Diagnostic Trouble Codes (DTC) are present after entering self-diagnostics, proceed to the TESTS W/O CODES article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.).