Engine Controls - Tests W/Codes - 3.3L/3.8L: Introduction

NOTE: This article has been revised due to Technical Service Bulletin No. 18-35-90, dated Dec. 21, 1990.

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