Remove the front drain tube (A).
Pull out the front drain valve (B) from the body hole.
Tie a string to the top end of the drain tube.
Pull out the drain tube from the A-pillar.
NOTE: Leave the string in the pillar to use when reinstalling the drain tube.
Honda Odyssey Service Manual > HondaVAC™ System Description: Sound Pattern of the Buzzer Pattern 1 ONOFF120±12 ms880±88 ms1000±100 ms Pattern 2 OFFON3000±300 ms ...