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: Terminal Accelerator Pedal & Voltage Description Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: ECM Terminals 50 (TP Sensor 1 Signal), 69 (TP Sensor 2 Signal) & Ground Voltage Test
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 ".