Test I: Engine Oil Pressure Switch
- Raise the car and place safety stands in the proper locations.
- Remove the right rear tire.
- Remove the YEL/RED wire from the engine oil pressure switch. See Fig 1.
- Check continuity between the positive terminal and engine (ground) with the engine off.
- If there is no continuity, the switch is OK.
- If there is continuity, do not replace the switch; first check other possible causes in next step.
- Make sure engine oil level is OK, then check engine oil pressure.
- If engine oil pressure is OK, replace the engine oil pressure switch.
- If oil pressure is low, remove, inspect, and, if necessary, replace the oil pump.
Courtesy of AMERICAN HONDA MOTOR CO., INC.