WARNING: This page is about a different car, the 2012 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
Disengage the pawl and turn EVAP canister vent control valve counterclockwise.
Lock (A)
Unlock (B)
Remove the EVAP canister vent control valve.
Fig 1: Identifying EVAP Canister Vent Control Valve Lock And Unlock Positions