Inspection While Low Engine Oil Warning Light Is On (Turbo Model)

Is engine oil level normal?

• Yes  : Go to  2.
• No: Replace engine oil or refill, and check while the oil level is normal condition. Ref. to LUBRICATION (H4DO)>Engine Oil>REPLACEMENT .

To turn off the low engine oil warning light, install the spare fuse at the delivery mode fuse in the main fuse box. Then turn the ignition switch to ON (engine OFF) to confirm the low engine oil warning light turns off. Remove the spare fuse installed to finish.

Has a DTC of the LAN system been input?

• Yes  : Perform the diagnosis according to DTC.
• No  : Go to 3. 

1. Turn the ignition switch to ON (engine OFF).
2. Read the current data for engine in the Subaru Select Monitor to confirm the item for "Oil level switch". Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Subaru Select Monitor>OPERATION>DATA MONITOR .

Is the "Oil level switch" signal displayed in Subaru Select Monitor HIGH?

• Yes  : To turn off the low engine oil warning light, install the spare fuse at the delivery mode fuse in the main fuse box. Then turn the ignition switch to ON (engine OFF) to confirm the low engine oil warning light turns off. Remove the spare fuse installed to finish.
  NOTE: The engine oil level switch is normal if the low engine oil level warning light turns off with the delivery mode fuse inserted.
• No: Go to 4. 

Perform the self-diagnosis of combination meter to check if there are any faults in the combination meter. Ref. to INSTRUMENTATION/DRIVER INFO>Combination Meter System>OPERATION .

Is combination meter OK?

• Yes  : Go to 5. 
• No: Replace the combination meter. Ref. to INSTRUMENTATION/DRIVER INFO>Combination Meter>REMOVAL .

Is there any insecure connection?

• Yes  : Remedy the connection condition. Then, to turn off the low engine oil warning light, install the spare fuse at the delivery mode fuse in the main fuse box. Then turn the ignition switch to ON (engine OFF) to confirm the low engine oil warning light turns off. Remove the spare fuse installed to finish.
  NOTE: The engine oil level switch is normal if the low engine oil level warning light turns off with the delivery mode fuse inserted.
• No: Go to 6. 

1. Deliberately short circuits by connecting the engine harness connector terminal and chassis ground.
2. Turn the ignition switch to ON (engine OFF).
3. Read the current data for engine in the Subaru Select Monitor to confirm the item for "Oil level switch". Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Subaru Select Monitor>OPERATION>DATA MONITOR .

Connector & terminal 

(E130) No. 1 - Chassis ground:

Is the "Oil level switch" signal displayed in Subaru Select Monitor HIGH?

• Yes  : Replace the oil level switch. Ref. to LUBRICATION (H4DO)>Oil Level Switch>REMOVAL .
• No: Go to 7. 

Is there any insecure connection?

• Yes  : Remedy the connection condition. Then, to turn off the low engine oil warning light, install the spare fuse at the delivery mode fuse in the main fuse box. Then turn the ignition switch to ON (engine OFF) to confirm the low engine oil warning light turns off. Remove the spare fuse installed to finish.
  NOTE: The engine oil level switch is normal if the low engine oil level warning light turns off with the delivery mode fuse inserted.
• No: Go to 8. 

1. Disconnect the engine control module (ECM) side connector.
2. Disconnect the connector between the engine harness and the oil level switch.
3. Measure the resistance between connector terminals.

Connector & terminal 

(B158) No. 44 - (E130) No. 1:

Is the resistance less than 1 Ω?

• Yes  : Replace the engine control module (ECM). Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>Engine Control Module (ECM)>REMOVAL .
• No  : Repair or replace the open circuit of engine harness.