2. Check Throttle Position Sensor Power Supply Circuit

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect electric throttle control actuator harness connector.

Fig 1: Identifying Electric Throttle Control Actuator Harness Connector
Courtesy of NISSAN MOTOR CO., U.S.A.
Turn ignition switch ON.
Check voltage between electric throttle control actuator terminal 1 and ground with CONSULT-11 or tester.

Fig 2: Checking Voltage Between Electric Throttle Control Actuator Terminal 1 & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

Voltage: Approximately 5V

OK or NG

OK: GO TO 3.
NG: Repair open circuit or short to ground or short to power in harness or connectors.