Throttle Position Sensor

Reconnect all harness connectors disconnected.
Perform Throttle Valve Closed Position Learning .
Turn ignition switch ON.
Set shift lever to D (A/T) or 1st (M/T) position.
Check voltage between ECM terminals 50 (TP sensor 1 signal), 69 (TP sensor 2 signal) and ground under the following conditions.

Fig 1: Throttle Position Sensor Voltage Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Checking Voltage Between ECM Terminals 50, 69 & 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 .