Ex & EXL

Remove the driver's airbag assembly (see AIR BAG RESTRAINT SYSTEMS ).
Remove the two screws and cover (A) from the steering wheel.

Fig 1: Removing The Two Screws & Cover From The Steering Wheel
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the two screws from the radio remote switch (B).
Disconnect the 4P connector from the radio remote switch.
Measure resistance between the No. 3 and No. 4 terminals in each switch position according to the table.

Fig 2: Radio Remote Switch Test Table
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If the resistance is not as specified, replace the remote switch.