Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Forester 1999-2004 Approved Subaru Forester 2004 2 - Engine Section (H4SO) Lubrication Engine Lubrication System Trouble in General

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Engine Lubrication System Trouble in General

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9. Engine Lubrication System Trouble in General
Before performing diagnostics, make sure that the engine oil level is correct and no oil leakage exists.
         Trouble                                           Possible cause                                     Corrective action
                            1) Oil pressure switch     Cracked diaphragm or oil leakage within switch      Replace.
                            failure                    Broken spring or seized contacts                    Replace.
                                                       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.
1. Warning light remains    2) Low oil pressure        Clogged oil passage                                 Clean.
on.                                                    Excessive tip clearance and side clearance of oil
                                                       pump rotor and gear
                                                       Clogged oil strainer or broken pipe                 Clean or replace.
                                                       Insufficient engine oil                             Replenish.
                            3) No oil pressure         Broken pipe of oil strainer                         Replace.
                                                       Stuck oil pump rotor                                Replace.
                            1) Malfunction of combination meter                                            Replace.
2. Warning light does
                            2) Poor contact of switch contact points                                       Replace.
not go on.
                            3) Disconnection of wiring                                                     Repair.
                            1) Poor contact at terminals                                                   Repair.
                            2) Defective wiring harness                                                    Repair.
3. Warning light flickers
momentarily.                                                                                               Check for the same
                            3) Low oil pressure                                                            possible causes as
                                                                                                           listed in 1. - 2).


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