Throttle Position Sensor

WARNING: This page is about a different car, the 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

Reconnect all harness connectors disconnected.
Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".
Turn ignition switch ON.
Set selector lever to D position.
Check voltage between ECM terminals 50 (TP sensor 1 signal), 69 (TP sensor 2 signal) and body ground under the following conditions.

Fig 1: Terminals Voltage Specification Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Checking Voltage Between ECM Terminals 50 (TP Sensor 1 Signal), 69 (TP Sensor 2 Signal) And Body Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
If NG, replace electric throttle control actuator and go to the next step.
Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".
Perform "IDLE AIR VOLUME LEARNING ".