Diagnostic Aids

Check for the following conditions:

1. Missing or damaged O-ring at fuel vapor and EVAP emission purge line canister fittings.
2. Cracked or punctured EVAP emission canister.
3. Damaged source vacuum line, EVAP emission purge line, EVAP emission vent hose or fuel tank vapor line.
4. Poor connection at ECM. Inspect harness connectors for the following conditions:
   • Backed-out terminals
   • Improper mating
   • Broken locks
   • Improperly formed
   • Damaged terminals
   • Poor terminals to wire connection
   • Physical damage to the wiring harness