Power Steering Pressure Sensor

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.

Reconnect all harness connectors disconnected.
Start engine and let it idle.
Check voltage between ECM terminal 118 and ground under the following conditions.

Fig 1: Checking Voltage Between ECM Terminals & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

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