Oil Level Sensor: Testing and Inspection

INSPECT ENGINE OIL LEVEL WARNING SENSOR




a. Check that continuity exists between terminals when the sensor-sensed temperature drops to 40 °C or less with the float down.




b. Heat the switch to above 60 °C (140 °F) in an oil bath.
c. Check that there is continuity between terminals with the switch ON (float down).
d. Check that there is no continuity between terminals with the switch OFF (float up).
If operation is not as specified, replace the switch.







INSPECT ENGINE OIL LEVEL WARNING SENSOR CIRCUIT
Disconnect the switch connector and inspect the connector on wire harness side, as shown.
If continuity is not as specified, inspect the wire harness or ground point.