Symptom Related Diagnostic Procedures

NOTE: Excessive fuel tank pressure could be caused by the fuel cap and does not necessarily indicate a problem with EVAP components.

1. Visually inspect components for:
^ Fuel odor or leakage.
^ Damaged vacuum or fuel vapor lines.
^ Loose vapor line connections.
^ Discharged battery.
^ Damaged connectors.
^ Damaged air flow meter.
^ Damaged or inoperative solenoid.

2. Exercise wiring and connector for canister purge solenoid. Check throttle body, air flows meter, and PCM for looseness, corrosion, or other problems.
3. Check fuel tank, fuel vapor lines, vacuum lines, and connections for looseness, pinching, leakage, or other obvious causes for malfunction.
4. If malfunction is not detected during visual inspection, proceed with component tests.