Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 1995-1999 Approved Subaru Legacy 1996 1996 Service Manual MECHANICAL COMPONENTS SECTION AIR CONDITIONING SYSTEM MSA5TCD96L6264

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                                                        DIAGNOSTICS                                                        4-7
                                                                                            5. Compressor Clutch Diagnosis


                                                         5. Compressor Clutch Diagnosis
                             Compressor clutch is not engaged.



                             Check both 10 A fuse for A/C.

                                              Fuse O.K.                                Fuse blown



                                                                      Determine cause of blown fuse. Replace faulty part(s)
                                                                      and fuse.


Does 12 volts exist in control panel connector (R/B)?     No          Faulty harness

                             Yes
                                                          No
Does 12 volts exist in control panel connector (B/W)?                 Faulty A/C switch

                             Yes

Does 12 volts exist in dual pressure switch connector     No
                                                                      Faulty harness
(G/Y)?

                             Yes

Does 12 volts exist in dual pressure switch connector     No
                                                                      Faulty dual pressure switch
(Br/Y)?

                             Yes

Does 12 volts exist in A/C relay connector (Br/R) and     No
                                                                      Faulty harness
(W)?

                             Yes

Does 12 volts exist in A/C relay connector (R/W)?         No
                                                                      Does 0 volts exist in A/C relay connector (Br/Y)?

                             Yes                                        Yes                                               No

                                                                      Faulty A/C relay                           To k
                                                                                                                    B


                                                          No
Does 12 volts exist in thermoswitch connector (R/W)?                  Faulty harness

                             Yes

Does 12 volts exist in thermoswitch connector (L/R)?      No          Faulty thermoswitch

                             Yes
                      To k
                         A




                                                                 47
4-7                                                        DIAGNOSTICS
5. Compressor Clutch Diagnosis


                            k
                            A


                                                            No
  Does 12 volts exist in A/C cut relay connector (L/Y)                Faulty harness
  and (Br/R)?

                               Yes

  Does 12 volts exist in A/C cut relay connector (Y/G)?     No        Does 0 volts exist in A/C cut relay connector (G)?

                               Yes                                       Yes                                           No

                                                                      Faulty A/C cut relay         Check engine control
                                                                                                   module.

                                                            No
  Does 12 volts exist in compressor connector (Y/G)?                  Faulty harness

                               Yes

  Faulty magnet clutch


                            k
                            B



  Does 12 volts exist in thermo control amplifier connec-   No
                                                                      Faulty harness
  tor (Br/R)?

                               Yes

  Does 0 volts exist in thermo control amplifier connec-    No
                                                                      Faulty harness or blower switch
  tor (R)?

                               Yes
                                                            No
  Does 0 volts exist in thermo control amplifier connec-              Faulty thermo control amplifier
  tor (W)?

                               Yes

  Faulty harness




                                                                 48

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