Engine Controls - Tests W/Codes: Introduction

NOTE: Some 1995 models use OBD-II diagnostics which was fully introduced for model year 1996. For further information, see BMW SELF DIAGNOSIS - 1996 article.

NOTE: Only those descriptions provided by manufacturer are included in this article. Information for 318ti is not available from manufacturer.

If no faults were found while performing BASIC DIAGNOSTIC PROCEDURES, 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.).

NOTE: All voltage tests should be performed with a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless specifically stated otherwise in testing procedures.