Section 50 (Engine Controls Self-Diagnostics - Introduction): Introduction

WARNING: This page is about a different car, the 1999 Honda Prelude, 1999 Honda Civic, and 1999 Honda CR-V. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Engine Control Module (ECM) is used on vehicles equipped with manual transmissions. Powertrain Control Module (PCM) is used on vehicles equipped with automatic transmissions. ECM will be referred to as PCM.

If no faults were found while performing BASIC DIAGNOSTIC PROCEDURES, proceed with self-diagnostics. If no Diagnostic Trouble Codes (DTCs) or only pass codes exist after entering self-diagnostics, proceed to TROUBLE SHOOTING - NO CODES article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.).