EVAP Canister Test
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Infiniti QX4, 2003 Infiniti Q45, 2003 Infiniti M45, 2003 Infiniti I35, and 2003 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.
Remove EVAP canister. Plug vent hose and blow air into port "A". Air should flow freely out of port "B". See Fig 1. Replace EVAP canister if operation is not as specified.