Press the master door lock switch in as shown to lock or unlock all doors.
Using the Master Door Lock Switch
When you lock/unlock either of the front doors using the master lock switch, all the other doors lock/ unlock at the same time.
Honda Civic Owners Manual. Rear Seat Heaters
The power mode must be in ON to use the
seat heaters.
There is no heater in the rear center seating
position.
The indicator for your setting comes on while
the seat heater is in use. Press the button on
the opposite side to turn the heater off. The
indicator goes off.
While in HI, ...