WARNING: This page is about a different car, the 2011 Infiniti M37. 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: Locking/Unlocking EVAP Canister Vent Control Valve