2. Check APP Sensor 2 Power Supply Circuit

WARNING: This page is about a different car, the 2004 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect electric throttle control actuator harness connector.
Turn ignition switch ON.
Check voltage between electric throttle control actuator terminal 10 and ground with CONSULT-II or tester.
1. Voltage: Approximately 2.5

OK or NG

OK: GO TO 3.

NG: Repair open circuit or short to ground or short to power in harness or connectors.

Fig 1: Checking Voltage Between Electric Throttle Control Actuator Terminal 10 & Ground

Courtesy of NISSAN MOTOR CO., U.S.A.