Diagnostic Aids

Check following items:

• Missing or damaged "O" rings at EVAP canister fuel vapor and purge line fittings.
• Cracks or punctures in EVAP canister.
• Damaged or disconnected source vacuum line, EVAP purge line, vent hose or fuel tank vapor line.
• Faulty connections at PCM. Inspect harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal-to-wire connection.
• Damaged harness. Inspect wiring harness to EVAP vent solenoid, EVAP purge solenoid, and fuel tank pressure sensor for intermittent open or short.