Honda 2010 Ridgeline Owner's Manual page 213

The security system will not set if
the hood, In-Bed Trunk, or any door
is not fully closed. If the system will
not set, check the door and tailgate
open monitor and In-Bed Trunk open
indicator on the instrument panel
(see pages 11 and 75 ) to see if the
doors and In-Bed Trunk are fully
closed. Since it is not part of the
monitor display, manually check the
hood.
NOTE: Use the remote transmitter
to quickly check that the hood,
In-Bed Trunk, and all doors are
closed. Push the lock button twice
within 5 seconds. There should be an
audible confirmation beep.
Do not attempt to alter this system
or add other devices to it.
2010 Ridgeline
Security System
209