Section 132 (Engine Controls - Trouble Shooting - No Codes): Introduction
WARNING: This page does not describe the selected car, but rather 34 other vehicles, including the 2002 Saturn Vue, 2002 Pontiac Montana, 2002 Pontiac Aztek, 2002 Oldsmobile Silhouette, and 2002 Oldsmobile Bravada. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Models may use an Engine Control Module (ECM), Powertrain Control Module (PCM) or Vehicle Control Module (VCM). The term PCM will be used in this article to describe all control modules.
Before diagnosing symptoms or intermittent faults, perform steps in appropriate BASIC DIAGNOSTIC PROCEDURES or SELF-DIAGNOSTICS articles. Use this article to diagnose driveability problems if a current DTC is not present.
Symptom checks are intended to direct technician to malfunctioning component(s) for further diagnosis. A symptom should lead to a specific component or system test, or an adjustment specification. Use intermittent test procedures to locate driveability problems not occurring when vehicle is being tested.
NOTE:
For specific testing procedures, see appropriate SYSTEM & COMPONENT TESTING article. For specifications, see appropriate SERVICE & ADJUSTMENT SPECIFICATIONS article.
NOTE:
SERVICE ENGINE SOON light, located on instrument cluster, is also referred to as Malfunction Indicator Light (MIL).