Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 1995-1999 Approved Subaru Legacy 1995 1995 Service Manual ENGINE SECTION ENGINE LUBRICATION SYSTEM MSA5TCD95L5478

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2-4                                                       DIAGNOSTICS
1. Engine Lubrication System


                                                            1. Engine Lubrication System
                                                            Before troubleshooting, 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
                                                                                                              Replace.
                                                          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) Burn-out bulb                                                                  Replace.
2. Warning light does not
                            2) Poor contact of switch contact points                                          Replace.
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 pos-
                            3) Low oil pressure                                                               sible causes as listed in
                                                                                                              1.--2)




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