DTC P0650: Mil Control Circuit: Description
WARNING: This page is about a different car, the 2002 Nissan Maxima and 2002 Infiniti I35. However, it is still accessible from the selected car via links, so may be relevant.
Malfunction Indicator Lamp (MIL) is located on the instrument panel. When the ignition is turned on without engine running, MIL will light up. This is a bulb check. When the engine is started, MIL should go off. If MIL remains on, the on-board diagnostic system has detected an engine system malfunction.