Subaru Forester Engine Lubrication System 1999 2000 (7) PDF

1. Engine Lubrication System Trouble in General
NOTE:
Before troubleshooting, make sure that the engine oil level is correct and no oil leakage exists.
Trouble Possible cause Corrective action
1. Warning light
remains on.
1) Oil pressure switch
failure
Cracked diaphragm or oil leakage within switch Replace.
Broken spring or seized contacts Replace.
2) Low oil pressure
Clogged oil filter Replace.
Malfunction of oil by-pass valve of oil filter Clean or replace.
Malfunction of oil relief valve of oil pump Clean or replace.
Clogged oil passage Clean.
Excessive tip clearance and side clearance of
oil pump rotor and gear
Replace.
Clogged oil strainer or broken pipe Clean or replace.
3) No oil pressure
Insufficient engine oil Replenish.
Broken pipe of oil strainer Replace.
Stuck oil pump rotor Replace.
2. Warning light does
not go on.
1) Burn-out bulb Replace.
2) Poor contact of switch contact points Replace.
3) Disconnection of wiring Repair.
3. Warning light flickers
momentarily.
1) Poor contact at terminals Repair.
2) Defective wiring harness Repair.
3) Low oil pressure
Check for the same pos-
sible causes as listed in
1.?2).
18
2-4 [K100] DIAGNOSTICS
1. Engine Lubrication System Trouble in General

Subaru Forester Engine Lubrication System 1999 2000 (7) Summary of Content

1. Engine Lubrication System Trouble in GeneralNOTE:Before troubleshooting, make sure that the engine oil level is correct and no oil leakage exists.Trouble Possible cause Corrective action1. Warning lightremains on.1) Oil pressure switchfailureCracked diaphragm or oil leakage within switch Replace.Broken spring or seized contacts Replace.2) Low oil pressureClogged oil filter Replace.Malfunction of oil by-pass valve of oil filter Clean or replace.Malfunction of oil relief valve of oil pump Clean or replace.Clogged oil passage Clean.Excessive tip clearance and side clearance ofoil pump rotor and gearReplace.Clogged oil strainer or broken pipe Clean or replace.3) No oil pressureInsufficient engine oil Replenish.Broken pipe of oil strainer Replace.Stuck oil pump rotor Replace.2. Warning light doesnot go on.1) Burn-out bulb Replace.2) Poor contact of switch contact points Replace.3) Disconnection of wiring Repair.3. Warning light flickersmomentarily.1) Poor contact at terminals Repair.2) Defective wiring harness Repair.3) Low oil pressureCheck for the same pos-sible causes as listed in1.2).182-4 [K100] DIAGNOSTICS1. Engine Lubrication System Trouble in General