Other information:
Inspection
1.
Turn ignition switch OFF.
2.
Remove the air cleaner assembly.
(Refer to Engine Mechanical System - "Air cleaner")
3.
Disconnect the solenoid valve connector (A).
...
The rear parking assist system may not sound sequentially depending on the
speed and shapes of the objects detected.
The rear parking assist system may malfunction if the vehicle bumper height
or sensor installation has been modified or damaged. Any non-factory installed
equipment or access ...