1. Check Throttle Control Motor Relay Power Supply Circuit-I

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

Turn ignition switch OFF.
Check voltage between ECM terminal 104 and ground with CONSULT-II or tester.
1. Voltage: Battery voltage

OK or NG

OK: GO TO 5 .
NG: GO TO 2.

Fig 1: Check voltage

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