Engine Oil Level Warning

Engine Oil Level Warning System
1. INSPECT WARNING LIGHT
(a) Disconnect the connector from the engine oil ECU.
(b) Ground terminal 1 on the wire harness side connector.
(c) Turn the ignition switch ON, check that the warning light lights up.
If the warning light does not light up, test the bulb.






2. INSPECT ENGINE OIL LEVEL SENSOR
(a) Check that there is continuity between terminal with the switch each position.






(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 up).
(d) Check that there is no continuity between terminals! with the switch OFF (float down).
If operation is not as specified, replace the switch.






3. INSPECT ENGINE OIL LEVEL ECU
(Operation)
(a) Disconnect the connector from the engine oil level sensor.
(b) Ground terminal 1 on the wire harness side connector.
(c) Turn the ignition switch ON, check that the warning light lights up approximately 40 seconds later.
If operation is not as specified, inspect the relay circuit.






(Relay Circuit)
(a) Disconnect the connectors from the engine oil level ECU and engine oil level sensor.






(b) Inspect the connectors on the wire harness side as shown in the chart
If circuit is as specified, replace the engine oil level ECU.