'09 model

Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
Remove the driver's dashboard undercover (see DRIVER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION ).
Push out the VSA OFF switch (A) from the back of the dashboard.

Fig 1: Identifying VSA OFF Switch And VSA OFF Switch 5P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Disconnect the VSA OFF switch 5P connector (B).
On the switch side, check for continuity between the VSA OFF switch 5P connector terminals No. 1 and No. 2. There should be continuity when the button is pressed, and no continuity when the button is released.

Fig 2: Checking Continuity Between VSA OFF Switch 5P Connector Terminals No. 1 And No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Install the VSA OFF switch in the reverse order of removal.