Inspection When Engine Oil Level Warning Light Is On

1. Turn the ignition switch to ON.
2. Using the Subaru Select Monitor, read all DTCs. Ref. to LAN SYSTEM (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

Is DTC detected?

YES:  Perform the diagnosis for the displayed DTCs.

NO:  Go to  2.

Check the engine oil level. Ref. to LUBRICATION (H4DOTC)>ENGINE OIL>INSPECTION .

Is engine oil level normal?

YES:  Go to  3.

NO: 

1. Adjust the engine oil level to a proper amount.
2. Go to  3.

1. Start the engine and warm up completely.
2. Turn the ignition switch to OFF and wait for 1 minute or more.
3. Turn the ignition switch to ON.
4. Check if engine oil level warning light goes off.

Does the engine oil level warning light go off?

YES:  System is normal.

Restore the vehicle to its original state.

NO:  Go to  4.

1. Turn the ignition switch to OFF.
2. Disconnect the ground terminal from battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
3. Disconnect the oil level switch connector.
4. Check continuity between the oil level switch terminal and chassis ground.

Is there continuity?

YES:  Go to  5.

NO:  Replace the oil level switch. Ref. to LUBRICATION (H4DOTC)>OIL LEVEL SWITCH .

Restore the vehicle to its original state.

1. Disconnect the ECM connector. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>ENGINE CONTROL MODULE (ECM)>REMOVAL .
2. Check continuity between the connector on the engine wiring harness oil level switch side and the connector on the engine wiring harness ECM side.

Is there continuity?

YES:  Go to  6.

NO: 

1. Repair the engine wiring harness.
2. Restore the vehicle to its original state.

1. Restore the vehicle to its original state.
2. Using the Subaru Select Monitor, perform the diagnosis of combination meter. Ref. to COMBINATION METER (DIAGNOSTICS)>ACTIVE TEST .

Is combination meter OK?

YES: 

1. Check for poor contact due to the wear of connector pin etc., and if no fault is found, replace the ECM. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>ENGINE CONTROL MODULE (ECM) .
2. Restore the vehicle to its original state.

NO: 

1. Replace the combination meter. Ref. to INSTRUMENTATION/DRIVER INFO>COMBINATION METER .
2. Restore the vehicle to its original state.