Accelerator Pedal Position Sensor
WARNING: This page is about a different car, the 2008 Infiniti EX35. However, it is still accessible from the selected car via links, so may be relevant.
If there is a malfunction in one of the systems, the accelerator opening angle is controlled by ECM according to a pre-determined accelerator angle to make driving possible. If there are malfunctions in tow systems, the engine speed is fixed by ECM to a pre-determined engine speed to make driving possible.