Flow of Diagnosis

1. Verify that the concern is with the Evaporative Emission (EVAP) system and not some other computer controlled system.
2. Inspect to determine if any of the following mechanical concerns apply:

VISUAL INSPECTION CHART

Mechanical
^ Improperly installed fuel filler cap.
^ Damaged (EVAP) test port.
^ Loose or disconnected components.
^ Damaged (EVAP) canister or vent solenoid.
^ Damaged or pinched lines or hoses.

3. If the concern remains after the inspection, determine the symptom and proceed to the Symptom Chart. Symptom Related Diagnostic Procedures
4. Reinstall or replace all evaporative emission hose clamps removed or damaged during testing procedures.