With CONSULT-II

WARNING: This page is about a different car, the 2005 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition switch ON.
Select "ETHANOL M/R ADJ" in "WORK SUPPORT" mode with CONSULT-II, then touch "START".

Fig 1: Identifying CONSULT-II ETHANOL M/R ADJ Screen
Courtesy of NISSAN MOTOR CO., U.S.A.
Select "E35" and then touch "UPDATE".

Fig 2: Selecting "E35" And Touching "UPDATE" Screen
Courtesy of NISSAN MOTOR CO., U.S.A.
Crank engine and make sure that engine starts.
If NG, go to next step.
Select "E70" and then touch "UPDATE".

Fig 3: Selecting "E70" And Touching "UPDATE"
Courtesy of NISSAN MOTOR CO., U.S.A.
Crank engine and make sure that engine starts.