System Description: Function

WARNING: This page is about a different car, the 2006 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

With the ignition switch in the ON or START position, power is supplied

through 10A fuse [No. 12, located in the fuse block (J/B)]
to sonar control unit terminal 8, and
through 10A fuse [No. 14, located in the fuse block (J/B)]
to park/neutral position (PNP) switch terminal 3 (4-speed A/T) or 2 (5-speed A/T).

Ground is supplied

to sonar control unit terminal 6
through body grounds B7 and B19.

With the ignition switch in the ON or START position, and the selector lever in the R position, power is supplied

to sonar control unit terminal 5
from park/neutral position (PNP) switch terminal 8 (4-speed A/T) or 4 (5-speed A/T).

With power and ground supplied, selector lever in R position, and the rear sonar system OFF switch ON, the rear sonar system will detect obstacles within 1.8 m (5.9 ft) of the rear sonar sensors. The vehicle operator is notified of obstacles by varied lengths of tone from the sonar buzzer depending on distance of obstacle being sensed.