D3 Switch Test

Remove the driver dashboard lower cover (see DASHBOARD CENTER LOWER COVER REMOVAL/INSTALLATION ).
Disconnect D3 switch/park pin switch/A/T gear position indicator panel light harness connector.
Check for continuity between D3 switch/park pin switch/A/T gear position indicator panel light harness connector terminals No. 1 and No. 3 when pressing the D3 switch.

Fig 1: Checking Continuity Between D3 Switch/Park Pin Switch/A/T Gear Position Indicator Panel Light Harness Connector Terminals 1 And 3
Courtesy of AMERICAN HONDA MOTOR CO., INC.
There should be continuity when pressing the D3 switch once, and there should be no continuity when pressing the D3 switch again.
If the D3 switch is OK, connect the connector and install the driver's dashboard lower cover. If the switch is faulty, replace the D3 switch (see D3 SWITCH REPLACEMENT ).