Driver's Door Key Cylinder Switch Test

Remove the door panel (see DOOR PANEL REMOVAL/INSTALLATION ).
Disconnect the 2P connector (A) from the key cylinder switch.

Fig 1: Disconnecting 2P Connector From Key Cylinder Switch
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check for continuity between the terminals in each switch position according to the table below.

Fig 2: Checking Continuity Between Terminals In Each Switch Position
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If the continuity is not as specified, replace the switch.