Section 53 (Engine Controls - System & Component Testing): Introduction

WARNING: This page is about a different car, the 1990 Cadillac Allante. However, it is still accessible from the selected car via links, so may be relevant.

To properly diagnose and repair this vehicle, follow testing procedure in SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS article. If no DTCs are present and a driveability condition exists, proceed to TROUBLE SHOOTING - NO CODES -- ALLANTE article for diagnosis by symptom (i.e., ROUGH IDLE, ENGINE STALLS, etc.).

NOTE: Testing individual components does not isolate shorts or opens. Perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure. Use ohmmeter to isolate wiring harness shorts or opens.