Diagnostic Aids

Check for missing or damaged "O" rings at EVAP canister fuel vapor and purge line fittings. Check for kinked, pinched or plugged vent hose. Check for faulty connections at PCM. Inspect harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal to wire connection or for damaged harness. Inspect wiring harness to EVAP vent solenoid, EVAP purge solenoid, and fuel tank pressure sensor for intermittent open or short.