Inspection When Oil Pressure Warning Light Is Illuminated

Read the DTC using Subaru Select Monitor. Ref. to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC)>OPERATION .

Is DTC detected?

Yes  :

1. Repair the corresponding system.
2. Go to  2 .

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 .

Start the engine, and check if the oil pressure warning light goes off.

Does the oil pressure warning light go off?

Yes  : System is normal.

Restore the vehicle to its original state.

No  : Go to  4 .

1. Turn the ignition to OFF.
2. Disconnect the ground terminal from battery sensor Ref. to REPAIR CONTENTS>NOTE>BATTERY .
3. Disconnect the terminal from oil pressure switch, and wrap the terminal with vinyl tape for insulation.
4. Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
5. Start the engine.
6. Check if the oil pressure warning light goes off.

Does the oil pressure warning light go off?

Yes  : Go to  6 .

No  : Go to  5 .

1. Turn the ignition to OFF.
2. Disconnect the ground terminal from battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
3. Disconnect the connector from the combination meter.
4. Check insulation of harness and chassis ground between combination meter and oil pressure switch.

Are they insulated?

Yes  :

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

No  :

1. Repair the harness between combination meter and oil pressure switch.
2. Restore the vehicle to its original state.

Check the oil pressure by using the oil pressure gauge Ref. to MECHANICAL (H4DOTC)>ENGINE OIL PRESSURE>INSPECTION .

Is the oil pressure is normal?

Yes  :

1. Replace the oil pressure switch Ref. to Lubrication (H4DOTC)>Oil Pressure Switch .
2. Restore the vehicle to its original state.

No  : Repair the engine assembly.