Throttle Position Sensor

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

Fig 1: Checking Voltage Between ECM Terminals 50, 69 & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Voltage Specification Table
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 ".