Throttle Position Sensor

WARNING: This page is about a different car, the 2004 Nissan Titan. 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 in BASIC DIAGNOSTIC PROCEDURES - TITAN article.
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 ground under the following conditions.

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

Fig 2: Checking Voltage
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 in BASIC DIAGNOSTIC PROCEDURES - TITAN article.
Perform IDLE AIR VOLUME LEARNING in BASIC DIAGNOSTIC PROCEDURES - TITAN article.