With Consult-II

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

Replace thermostat with new one. Refer to THERMOSTAT AND WATER CONTROL VALVE . Use only a genuine NISSAN thermostat as a replacement. If an incorrect thermostat is used, the MIL may come on.
Turn ignition switch ON.
Select "COOLAN TEMP/S" in "DATA MONITOR" mode with CONSULT-II.

Fig 1: Scan Tool Display - Data Monitor
Courtesy of NISSAN MOTOR CO., U.S.A.
Check that the "COOLAN TEMP/S" is above 60°C (140°F).
If it is below 60°C (140°F), go to following step.

If it is above 60°C (140°F), stop engine and cool down the engine to less than 60°C (140°F), then retry from step 1.
Drive vehicle for 10 consecutive minutes under the following conditions.

Fig 2: Inspecting Condition Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

If 1st trip DTC is detected, go to DTC P0128: THERMOSTAT FUNCTION .