Possible Cause
WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
Right front curtain air bag module has an open circuit, is shorted to power supply circuit, is shorted to ground or circuits are shorted to each other.
Right rear curtain air bag module has an open circuit, is shorted to power supply circuit, is shorted to ground or circuits are shorted to each other.