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Engine Lubrication System (Except Wrx): Diagnosis Subaru XV GP

Lubrication System 12 illustrations ~612 words

INSPECTION

StepCheckYesNo
1 CHECK COMBINATION METER. Turn the ignition switch to ON. (engine OFF) Check the warning light in the combination meter.Does the warning light illuminate?Go to step 2 .Repair or replace the combination meter. < Ref. to INSPECTION , Combination Meter System. >
2 CHECK POWER SUPPLY TO OIL PRESSURE SWITCH. Turn the ignition switch to OFF. Disconnect the terminal from oil pressure switch. Turn the ignition switch to ON. Measure the voltage between oil pressure switch harness terminal and chassis ground. Terminals (E11) No. 1 (+) - Chassis ground (-)Is the voltage 10 V or more?Replace the oil pressure switch. < Ref. to OIL PRESSURE SWITCH . >Go to step 3 .
3 CHECK COMBINATION METER. Turn the ignition switch to OFF. Remove the combination meter. Measure the resistance of combination meter. Terminals No. 20 - No. 3Is the resistance less than 10 ohms?Repair the harness and connector. NOTE: In this case, repair the following item: Open circuit of harness between combination meter and oil pressure switch Poor contact of combination meter connector Poor contact of oil pressure switch terminal Poor contact of coupling connectorRepair or replace the combination meter. < Ref. to INSPECTION , Combination Meter System. >
NOTE
In this case, repair the following item: Open circuit of harness between combination meter and oil pressure switch Poor contact of combination meter connector Poor contact of oil pressure switch terminal Poor contact of coupling connector
CAUTIONIf the engine oil is spilt over exhaust pipe or the under cover, wipe it off with cloth to avoid emitting smoke or causing a fire.

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  1. Park the vehicle on a level surface.
  2. Remove the oil level gauge and wipe away the oil.
  3. Reinsert the oil level gauge all the way. Be sure that the oil level gauge is correctly inserted and properly orientated.
  4. Pull out the oil level gauge again, and check both sides of the oil level gauge. Use a lower side to determine the engine oil level. If the engine oil level is below "L" line, check for oil leakage from engine and add oil to bring the level up to "F" line.
  5. Start the engine to circulate the oil in engine.
  6. After turning off the engine, wait a few minutes for the oil to return to the oil pan before checking the level. NOTE: To prevent overfilling of engine oil, do not add oil above "F" line when the engine is cold. As the oil level gauge is used for daily maintenance, "F" line and "L" line is set assuming that the engine is cold.

Check that the oil pan, oil pan upper, oil strainer and baffle plate do not have deformation, cracks or damage.

  1. Check that the oil pressure switch does not have deformation, cracks or damage.
  2. Check that there are no oil leaks or oil oozing from the oil pressure switch installation portion.
  1. After installing the oil filter, run the engine and check for oil leakage. NOTE: The filter element and filter case are permanently jointed; therefore, interior cleaning is not necessary.
  2. Check the engine oil level. < Ref. to «INSPECTION»(ref-560354-S05253768682013061300000) , Engine Oil. >

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  1. Disconnect the ground cable from battery.
  2. Disconnect the oil level switch connector from the engine harness, and remove the clip (A) securing the harness.
  3. Remove the clip (A) from the air intake boot.
  4. Loosen the clamp (B) connecting the air intake boot and air cleaner case (rear).
  5. Loosen the clamp (C) which connects the air intake boot and throttle body.
  6. Remove the air intake boot from the throttle body, and move the air intake boot to the left side wheel apron.
  7. Disconnect the transmission harness connector (A) and inhibitor harness connector (B). (CVT model)
  8. Remove the transmission cover. (CVT model)
  9. Remove the bolt from the connector bracket. (CVT model)
  10. Remove the bolt of transmission harness, and rotate it clockwise as shown in the figure, till it moves as much as the width of a bolt. (CVT model)
  11. Lift up the vehicle.
  12. Remove the under cover. < Ref. to «REMOVAL»(ref-560372-S42274069342013061300000) , Front Under Cover. >
  13. Drain the engine oil. < Ref. to «REPLACEMENT»(ref-560354-S15960665222013061300000) , Engine Oil. >
  14. Remove the front exhaust pipe. < Ref. to «REMOVAL»(ref-560376-S32386970822013061300000) , Front Exhaust Pipe. >
  15. Remove the nuts which secure the engine mounting to the front crossmember. (CVT model)
  16. Remove the nuts which secure the engine mounting to the front crossmember. (MT model)
  17. Remove the electric power steering gearbox. < Ref. to «REMOVAL»(ref-560370-S12738617832013061300000) , Electric Power Steering Gearbox. >
  18. Remove the front drive shaft LH. < Ref. to «REMOVAL»(ref-560368-S09216216402013061300000) , Front Drive Shaft. >
  19. Support the engine with a lifting device and wire ropes.
  20. Remove the engine mounting LH from the engine.
  21. Remove clip (A) from the oil pan upper, and remove the oil level switch.

INSPECTION WHILE LOW ENGINE OIL LEVEL WARNING LIGHT IS ON

StepCheckYesNo
1 CHECK ENGINE OIL LEVEL.Is engine oil level normal?Go to step 2 .Replace engine oil or refill, and check again while the oil level is normal condition. < Ref. to REPLACEMENT , Engine Oil. > To turn off the low engine oil level warning light, install the spare fuse at the delivery (test) mode fuse in the main fuse box. Then turn the ignition switch to ON (engine off) again, to confirm the low engine oil level 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 (test) mode fuse inserted.
2 CHECK LAN SYSTEM.Has a DTC of the LAN system been input?Perform the diagnosis according to DTC.Go to step 3 .
3 CHECK OIL LEVEL SWITCH CIRCUIT. Turn the ignition switch to ON (engine OFF). Read the current data for engine in the Subaru Select Monitor to confirm the item for "Oil level switch". < Ref. to READ CURRENT DATA FOR ENGINE (NORMAL MODE) , OPERATION, Subaru Select Monitor. >Is the "Oil level switch" signal displayed in Subaru Select Monitor HIGH?To turn off the low engine oil level warning light, install the spare fuse at the delivery (test) mode fuse in the main fuse box. Then turn the ignition switch to ON (engine off) again, to confirm the low engine oil level 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 (test) mode fuse inserted.Go to step 4 .
4 CHECK COMBINATION METER. Perform the self-diagnosis of combination meter to check if there are any faults in the combination meter. < Ref. to OPERATION , Combination Meter System. >Is combination meter OK?Go to step 5 .Replace the combination meter. < Ref. to REMOVAL , Combination Meter. >
5 CHECK SECURE CONNECTION OF CONNECTOR BETWEEN ENGINE HARNESS AND OIL LEVEL SWITCH.Is there any insecure connection?Remedy the connection condition. Then, to turn off the low engine oil level warning light, install the spare fuse at the delivery (test) mode fuse in the main fuse box. Then turn the ignition switch to ON (engine off) again, to confirm the low engine oil level 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 (test) mode fuse inserted.Go to step 6 .
6 CHECK OIL LEVEL SWITCH. Deliberately short circuits by connecting the engine harness connector terminal and chassis ground. Turn the ignition switch to ON (engine OFF). Read the current data for engine in the Subaru Select Monitor to confirm the item for "Oil level switch". < Ref. to READ CURRENT DATA FOR ENGINE (NORMAL MODE) , OPERATION, Subaru Select Monitor. > Connector & terminal (E130) No. 1 - Chassis groundIs the "Oil level switch" signal displayed in Subaru Select Monitor HIGH?Replace the oil level switch. < Ref. to REMOVAL , Oil Level Switch. >Go to step 7 .
7 CHECK SECURE CONNECTION OF CONNECTOR BETWEEN BULKHEAD HARNESS AND ENGINE HARNESS.Is there any insecure connection?Remedy the connection condition. Then, to turn off the low engine oil level warning light, install the spare fuse at the delivery (test) mode fuse in the main fuse box. Then turn the ignition switch to ON (engine off) again, to confirm the low engine oil level 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 (test) mode fuse inserted.Go to step 8 .
8 CHECK ENGINE HARNESS. Disconnect the connector on the oil level switch side for the engine harness. Disconnect the connector on the bulkhead harness side for the engine harness. Measure the resistance between connector terminals. Connector & terminal (E2) No. 1 - (E130) No. 1Is the resistance less than 1 ohms?Go to step 9 .Repair or replace the open circuit of engine harness.
9 CHECK SECURE CONNECTION OF CONNECTOR BETWEEN ENGINE CONTROL MODULE (ECM) AND BULKHEAD HARNESS. Remove the glove box lid assembly. < Ref. to REMOVAL , Glove Box. >Is there any insecure connection?Remedy the connection condition. Then, to turn off the low engine oil level warning light, install the spare fuse at the delivery (test) mode fuse in the main fuse box. Then turn the ignition switch to ON (engine off) again, to confirm the low engine oil level 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 (test) mode fuse inserted.Go to step 10 .
10 CHECK BULKHEAD HARNESS. Remove the glove box lid assembly. < Ref. to REMOVAL , Glove Box. > Disconnect the engine control module (ECM) side connector for the bulkhead harness. Disconnect the engine harness connectors from the bulkhead harness. Measure the resistance between connector terminals. Connector & terminal (B136) No. 26 - (B21) No. 1Is the resistance less than 1 ohms?Replace the engine control module (ECM). < Ref. to REMOVAL , Engine Control Module (ECM). >Repair or replace the open circuit of the bulkhead harness.
NOTE
The engine oil level switch is normal if the low engine oil level warning light turns off with the delivery (test) mode fuse inserted.
NOTE
The engine oil level switch is normal if the low engine oil level warning light turns off with the delivery (test) mode fuse inserted.
NOTE
The engine oil level switch is normal if the low engine oil level warning light turns off with the delivery (test) mode fuse inserted.
NOTE
The engine oil level switch is normal if the low engine oil level warning light turns off with the delivery (test) mode fuse inserted.
NOTE
The engine oil level switch is normal if the low engine oil level warning light turns off with the delivery (test) mode fuse inserted.

OTHER INSPECTIONS

  1. Check that the oil level switch does not have deformation, cracks, or damage.
  2. Check the oil level switch installation part for oil leakage and oil seepage.

Before performing diagnostics, make sure that the engine oil level is correct and no oil leakage exists.

TroublePossible causeCorrective action
Warning light remains ON.A. Oil pressure switch failure
O Cracked diaphragm or oil leakage within switchReplace.
O Broken spring or seized contactsReplace.
B. Low oil pressure
O Clogging of oil filterReplace.
O Malfunction of oil by-pass valve in oil filterReplace.
O Clogged oil passageClean.
O Excessive tip clearance and side clearance of oil pump rotorReplace.
O Clogged oil strainer or broken pipeClean or replace.
C. No oil pressure
O Insufficient engine oil (degradation, etc.)Replace.
O Broken pipe of oil strainerReplace.
O Stuck oil pump rotorReplace.
Warning light does not illuminate.A. Malfunction of combination meterReplace.
B. Poor contact of switch contact pointsReplace.
C. Disconnection of wiringRepair.
Warning light flickers momentarily.A. Defective terminal contactRepair.
B. Defective wiring harnessRepair.
C. Oil pressure switch failure
O Cracked diaphragm or oil leakage within switchReplace.
O Broken spring or seized contactsReplace.
D. Low oil pressure
O Clogging of oil filterReplace.
O Malfunction of oil by-pass valve in oil filterReplace.
O Clogged oil passageClean.
O Excessive tip clearance and side clearance of oil pump rotorReplace.
O Clogged oil strainer or broken pipeClean or replace.

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