Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 1995-1999 Approved Subaru Legacy 1996 1996 Service Manual ELECTRICAL SECTION BODY ELECTRICAL SYSTEM MSA5TCD96L6398

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MSA5TCD96L6398


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6-2                       DIAGNOSTICS
2. AT Shift Lock System


                           2. AT Shift Lock System
                           A: WIRING DIAGRAM




                                                     B6M0466




                              66
                                                        DIAGNOSTICS                                                   6-2
                                                                                                 2. AT Shift Lock System


                                                         B: BASIC DIAGNOSTICS CHART

Turn ignition switch ON.




Check that shift lever does not move from "P" to any    Not OK        Conduct diagnostics procedure No. 1. 

                            OK


Check if shift lever moves from "P" to any other        Not OK        Conduct diagnostics procedure No. 2. 

                            OK


Move shift lever to "N" and turn ignition switch OFF.




Check that ignition key cannot be removed from slot     Not OK
                                                                      Conduct diagnostics procedure No. 3. 

                            OK


Check if ignition key can be removed with shift lever   Not OK
                                                                      Conduct diagnostics procedure No. 4. 

                            OK


System is OK.




                                                                 67
6-2                                                       DIAGNOSTICS
2. AT Shift Lock System


                                                           C: DIAGNOSTICS PROCEDURE No. 1

                                                          Not OK
  Check that stop lights do not remain on when brake                    Check stop light system.
  pedal is released.

                              OK


  Disconnect connector from shift lock control module.




  Check that shift lock does not occur when shift lever   Not OK        Replace shift lock control module.
  is moved to "P".

                              OK


  Disconnect connector from "P" position switch.




  Disconnect connector from shift lock solenoid.



                                                          Not OK
  Check that shift lock does not occur when shift lever                 Short in wiring harness of shift lock solenoid.
  is moved to "P".

                              OK


  Check selector lever assembly.




                                                                   68
                                                       DIAGNOSTICS                                                         6-2
                                                                                                  2. AT Shift Lock System


                                                        D: DIAGNOSTICS PROCEDURE No. 2 (SHIFT
                                                        LOCK DOES NOT RELEASE.)

                                                       Not OK
Check if stop light comes on when brake pedal is                     Check stop light system.
depressed.

                            OK
                                                       Not OK
Check if voltage between shift lock control module                   Repair or replace wiring harness or faulty connector
terminal No. 4 and body is at least 10 V when brake                  between stop light switch and shift lock control
pedal is depressed.                                                  module.

                            OK
                                                       Not OK
Check if voltage between shift lock control module                   Check fuse.
terminal No. 1 and body is at least 10 V when                        Repair or replace wiring harness or faulty connector
ignition switch is turned ON.                                        between ignition switch and shift lock control
                                                                     module.
                            OK

Turn ignition switch OFF.
Disconnect connector from shift lock control module.


                                                       Not OK
Check if continuity exists between terminal No. 2 of                 Check inhibitor switch or repair wiring harness.
shift lock control module connector and body when
shift lever is set at "P".

                            OK
                                                       Not OK
Check if continuity exists between terminal No. 5 of                 Check "P" position switch or repair wiring harness.
shift lock control module connector and body when
shift lever is set at "P".

                            OK

Measure resistance between terminal No. 1 of shift
lock control module connector and body.


                                                       Not OK
Resistance is less than 20 .                                         Shift lock solenoid circuit is shorted. Repair or
                                                                     replace wiring harness or faulty connector between
                            OK                                       shift lock solenoid and shift lock control module.

                                                       Not OK
Resistance is at least 10 .                                          Shift lock solenoid is shorted or poorly grounded.
                                                                     * After repairs, recheck solenoid operation.
                            OK                                       If still faulty, replace shift lock control module.

                                                       Not OK
Check if resistance between terminal No. 10 of shift                 Shift lock control module ground circuit open or poor
lock control module connector and body is less than                  connector contact.
10 .

                            OK

Replace shift lock control module.




                                                                69
6-2                                                      DIAGNOSTICS
2. AT Shift Lock System


                                                          E: DIAGNOSTICS PROCEDURE No. 3 (KEY
                                                          INTERLOCK DOES NOT OPERATE.)

                                                         Not OK
  Check if shift lock operates properly.                                  Check diagnostics procedure "No. 1" or "No. 2".

                                 OK

                                                         Not OK
  Check if voltage between shift lock control module                      Faulty key switch.
  terminal No. 8 and body is at least 10 V when                           Repair or replace wiring harness or faulty connector
  ignition key is inserted in its slot.                                   between fuse box and shift lock control module.

                                 OK


  Check if voltage between shift lock control module     Not OK           Repair or replace wiring harness or faulty connector
  terminal No. 7 and body is at least 10 V when                           between ignition switch and shift lock control
  ignition switch is set to ACC.                                          module.

                                 OK


  Disconnect connector from shift lock control module.   Not OK
                                                                          Key lock solenoid circuit open. Repair or replace
  Check if resistance between terminal No. 9 and                          wiring harness or faulty connector between key lock
  terminal No. 11 of shift lock control module                            solenoid and shift lock control module.
  connector is less than 8 .

                                 OK


  Voltage is at least 4 V. (*)                           Not OK
                                                                          Key lock solenoid is shorted.
                                                                          Repair or replace wiring harness or faulty connector
                                 OK                                       between key lock solenoid and shift lock control
                                                                          module.
                                                         Not OK           * After repairs, recheck for proper operation.
  Check if resistance between terminal No. 11 of shift
  lock control module connector and body is at least 1                    If still faulty, replace shift lock control module.
  M.

                                 OK


  Replace shift lock control module.




*: When conducting operational checks of the key lock solenoid, do not apply 12 V to solenoid for more than one second, since
   this may break solenoid circuit.




                                                                  70
                                                         DIAGNOSTICS                                                        6-2
                                                                                                      2. AT Shift Lock System


                                                          F: DIAGNOSTICS PROCEDURE No. 4 (KEY
                                                          INTERLOCK DOES NOT RELEASE.)

                                                         Not OK
  Check if shift lock operates properly.                                  Check diagnostics procedure "No. 1" or "No. 2".

                              OK

                                                         Not OK
  Check if voltage between shift lock control module                      Faulty key switch. Repair or replace wiring harness
  terminal No. 8 and body is at least 10 V when                           or faulty connector between fuse box and shift lock
  ignition key is inserted in its slot.                                   control module.

                              OK


  Check if voltage between shift lock control module     Not OK           Repair or replace wiring harness or faulty connector
  terminal No. 7 and body is at least 10 V when                           between ignition switch and shift lock control
  ignition switch is set to ACC.                                          module.

                              OK


  Disconnect connector from shift lock control module.   Not OK
                                                                          Key lock solenoid circuit open.
  Check if resistance between terminal No. 9 and                          Repair or replace wiring harness or faulty connector
  terminal No. 11 of shift lock control module                            between key lock solenoid and shift lock control
  connector is less than 8 . (*)                                          module.

                              OK


  Voltage is at least 4 V.                               Not OK
                                                                          Key lock solenoid is shorted.
                                                                          Repair or replace wiring harness or faulty connector
                              OK                                          between key lock solenoid and shift lock control
                                                                          module.
                                                                          * After repairs, recheck for proper operation.
                                                                          If still faulty, replace shift lock control module.



  Check if resistance between terminal No. 9 of shift    Not OK
                                                                          Repair or replace wiring harness or faulty connector
  lock control module connector and body is at least 1                    between key lock solenoid and shift lock control
  M.                                                                      module.
                                                                          * After repairs, recheck for proper operation.
                              OK                                          If still faulty, replace shift lock control module.



  Replace shift lock control module.




*: When conducting operational checks of the key lock solenoid, do not apply 12 V to solenoid for more than one second, since
   this may break solenoid circuit.




                                                                  71



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