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Basic Diagnostic Procedures (Anti-Theft/Security System)

NOTE: Perform keyless entry basic diagnostic procedures before performing this test. See BASIC DIAGNOSTIC PROCEDURES (KEYLESS ENTRY SYSTEM)  .
  1. Open all windows. Remove ignition key from ignition switch. Set interior/room light switch to middle position. Close all doors, rear gate or trunk lid. Press LOCK/ARM button on remote transmitter once. If interior light blinks once, go to next step. If interior light does not blink, go to step  21 .
  2. Check if security indicator is blinking every 2 seconds. If security indicator light is blinking, go to next step. If security indicator light is not blinking or not blinking every 2 seconds, go to step  37 .
  3. Press UNLOCK/DISARM button on remote transmitter once. Check if turn signal light blinked 2 times. If turn signal light blinked 2 times, go to next step. If turn signal light did not blink 2 times, replace security control module.
  4. If interior/room light illuminates and stays on for 30 seconds, then turns off, go to next step. If interior/room light did not illuminate or stays on for more or less than 30 seconds, replace security control module.
  5. Unlock all doors using door lock switch on driver's door. Open driver's door. Check if security indicator is flashing every 1/8 second. If security indicator light is flashing, go to next step. If security indicator light is not flashing, go to step  40 .
  6. Check if turn signal light is still blinking. If turn signal light is still blinking, go to next step. If turn signal light is not blinking, replace security control module.
  7. Check if horn is still on. If horn is still on, go to next step. If horn is not on, go to step  81 .
  8. Attempt to start engine. If starter cranks, go to step  44 . If starter does not crank, go to next step.
  9. Close driver's door. If horn stops and turn signal light stops blinking, and starter cranks after about 30 seconds, go to next step. If horn is still on and turn signal light is still blinking, and starter will not crank, replace security control module.
  10. Check if security indicator light is blinking every 2 seconds. If indicator light is blinking every 2 seconds, go to next step. If indicator light is not blinking every 2 seconds, replace security control module.
  11. Open right front door. Check if security indicator light is blinking every 1/8 second, horn is on, turn signal light is blinking and if starter is deactivated. If all these items are as specified, go to next step. If any or all of these items are not as specified, go to step  61 .
  12. Press UNLOCK/DISARM button on remote transmitter. If security indicator lights blink, horn and turn signal light deactivate, and starter reactivates, go to next step. If security indicator light does not blink or horn and turn signal light stays on, or starter does not activate, replace security control module.
  13. Close right front door. Press LOCK/ARM button on remote transmitter. Open left rear door. If security indicator light blinks every 1/8 second, horn sounds, turn signal light blinks, and starter is deactivated, go to next step. If security indicator light does not blink every 1/8 second, horn does not sound, turn signal light does not blink, and starter is not deactivated, go to step  64 .
  14. Close left rear door. Open right rear door. If security indicator light blinks every 1/8 second, horn sounds, turn signal light blinks, and starter is deactivated, go to next step. If security indicator light does not blink every 1/8 second, horn does not sound, turn signal light does not blink, and starter is not deactivated, go to step  67 .
  15. Close right rear door. On station wagon, go to next step. On all other models, go to step  17 .
  16. Open rear gate. If security indicator light blinks every 1/8 second, horn sounds, turn signal light blinks, and starter is deactivated, go to step  18 . If security indicator light does not blink every 1/8 second, horn does not sound, turn signal light does not blink, or starter is not deactivated, go to step  70 .
  17. Open trunk lid. If security indicator light blinks every 1/8 second, horn sounds, turn signal light blinks, and starter is deactivated, go to next step. If security indicator light does not blink every 1/8 second, horn does not sound, turn signal light does not blink, or starter is not deactivated, go to step  74 .
  18. Close rear gate or trunk lid. Close all windows. Perform impact sensitivity test. Cover hood with a blanket. Arm system. Firmly strike center of windshield with the open palm of the hand. If horn chirps, go to next step. If horn does not chirp, go to step  78 .
  19. Remove driver-side sill cover. Disconnect White 1-pin connector at lower front pillar. Close all doors, rear gate or trunk lid. If system automatically arms after one minute, go to next step. If system does not automatically arm after one minute, go to step  80 .
  20. Press UNLOCK/DISARM button on remote transmitter. Connect White 1-pin connector at lower front pillar. Install driver-side sill cover. Open hood. Press LOCK/ARM button on remote transmitter. Disconnect then reconnect ground cable from battery. If system rearms automatically, system is operating normally. If system does not rearm automatically, replace security control module.
  21. Check fuse No. 7 (20-amp) in main fuse box. Replace as necessary and recheck system operation. If fuse is okay, go to next step.
  22. Check fuse No. 5 (10-amp). Replace as necessary and recheck system operation. If fuse is okay, go to next step.
  23. Check each turn signal light. Replace as necessary and recheck system operation. If turn signal lights are okay, go to next step.
  24. Check voltage between ground and main fuse box 4-pin connector terminal No. 4 (White wire). If voltage is 10 volts or greater, go to next step. If voltage is less than 10 volts, repair circuit between fuse box and battery. See WIRING DIAGRAMS  .
  25. Disconnect security control module harness connector. Turn ignition on. Check voltage between ground and security control module harness connector terminal No. 11. See Figure . If voltage is 10 volts or greater, go to next step. If voltage is less than 10 volts, repair circuit between security control module harness connector and main fuse box.
  26. Turn ignition off. Disconnect 12-pin harness connector from fuse box. Check resistance between security control module harness connector terminal No. 12 and fuse box harness connector terminal No. 10. See Fig 1 and Figure . If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between security control module and main fuse box.
    Fig 1: Identifying Fuse Box 12-Pin Harness Connector Terminals
    G99B50048Courtesy of SUBARU OF AMERICA, INC.
    Fig 2: Identifying Fuse Box 7-Pin Harness Connector Terminals
    G99I54732Courtesy of SUBARU OF AMERICA, INC.
  27. Check resistance between fuse box 7-pin harness connector terminal No. 1 and 12-pin harness connector terminal No. 10. See Fig 1 and Fig 2 . If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair or replace main fuse box.
  28. Check resistance between main fuse box 12-pin harness connector terminals No. 10 and 11. See WIRING DIAGRAMS  . If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair or replace main fuse box.
  29. Disconnect right front turn signal light harness connector. Check resistance of Black/Blue wire between turn signal light harness connector terminal No. 1 and main fuse box 7-pin harness connector terminal No. 1. If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between right front turn signal light harness connector and main fuse box 7-pin harness connector.
  30. Disconnect left front turn signal light harness connector. Check resistance of Black/Blue wire between turn signal light harness connector terminal No. 1 and main fuse box 7-pin harness connector terminal No. 1. If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between left front turn signal light harness connector and main fuse box 7-pin harness connector.
  31. Check resistance between ground and right front turn signal light harness connector terminal No. 2 (Black wire). If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between harness connector terminal No. 2 and ground. See WIRING DIAGRAMS  .
  32. Check resistance between ground and left front turn signal light harness connector terminal No. 2 (Black wire). If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between harness connector terminal No. 2 and ground.
  33. Disconnect right rear turn signal light harness connector. Check resistance of Black/Red wire between main fuse box 12-pin harness connector terminal No. 10 and turn signal light 4-pin harness connector terminal No. 3 (terminal No. 4 on station wagon). On all models, if resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between right rear turn signal light harness connector and main fuse box 12-pin harness connector.
  34. Disconnect left rear turn signal light harness connector. Check resistance of Black/Red wire between main fuse box 12-pin harness connector terminal No. 10 and turn signal light 4-pin harness connector terminal No. 3 (terminal No. 4 on station wagon). On all models, if resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between left rear turn signal light harness connector and main fuse box 12-pin harness connector.
  35. Check resistance between ground and right rear turn signal light harness connector terminal No. 2 (Black wire). If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between harness connector terminal No. 2 and ground.
  36. Check resistance between ground and left rear turn signal light harness connector terminal No. 2 (Black wire). If resistance is less than 10 ohms, replace security control module. If resistance is 10 ohms or greater, repair circuit between harness connector terminal No. 2 and ground.
  37. Disconnect security control module harness connector. Using a jumper wire, jumper harness connector terminal No. 9 to ground. See Figure . If security indicator light comes on, replace security control module. If security indicator light does not come on, go to next step.
  38. Disconnect combination meter 14-pin harness connector. Check voltage between ground and combination meter 14-pin harness connector terminal No. 7. See Fig 3 . If voltage is 10 volts or greater, go to next step. If voltage is less than 10 volts, repair circuit between security indicator light and main fuse box.
  39. Check resistance between combination meter 14-pin harness connector terminal No. 1 and security control module harness connector terminal No. 9. See Fig 3 and Figure . If resistance is less than 10 ohms, replace indicator light bulb. If resistance is 10 ohms or greater, repair circuit between security indicator light and security control module.
  40. Disconnect harness connector from security control module and combination meter. Check resistance between combination meter 30-pin harness connector terminal No. 23 and security control module harness connector terminal No. 5. See Fig 3 and Figure . If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between combination meter and security control module harness connectors. See WIRING DIAGRAMS  .
    Fig 3: Identifying Combination Meter Harness Connector Terminals
    G99J54725Courtesy of SUBARU OF AMERICA, INC.
  41. Disconnect left front door switch harness connector. Check resistance of Blue/White wire between door switch harness connector terminal No. 1 and combination meter 30-pin harness connector terminal No. 7. If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between door switch and combination meter harness connectors.
  42. Check resistance of Black wire between ground and door switch harness connector terminal No. 3. If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between door switch and ground.
  43. Remove combination meter from instrument panel. Check resistance between combination meter 30-pin connector terminals No. 7 and 23. If resistance is less than 10 ohms, replace security control module. If resistance is 10 ohms or greater, repair or replace combination meter.
    NOTE: On A/T models, place transmission in Park or Neutral position. On M/T models, depress clutch pedal.
  44. Disconnect electrical connector (White/Blue wire) from starter motor. Turn ignition switch to START position. Check voltage between ground and starter connector White/Blue wire terminal. If voltage is 10 volts or greater, go to next step. If voltage is less than 10 volts, go to step  46 .
  45. Turn ignition off. Check resistance between starter ground cable and engine ground. If resistance is less than 5 ohms, repair or replace starter motor. If resistance is 5 ohms or greater, repair or replace starter ground cable.
  46. Check fusible link in main fuse box. Replace as necessary and retest system. If fusible link is okay, go to next step.
  47. Check fuse SBF-4 (50-amp) in main fuse box. Replace as necessary and retest system. If fuse is okay, go to next step.
  48. Turn ignition off. Remove interrupt relay. See COMPONENT LOCATIONS  . Check for continuity between interrupt relay terminals No. 1 and 4. See Figure . If continuity exists, go to next step. If continuity does not exist, replace relay.
  49. Check for continuity between interrupt relay terminals No. 2 and 6. If continuity exists, go to next step. If continuity does not exist, replace relay.
  50. Connect battery voltage to interrupt relay terminal No. 4 and connect ground to relay terminal No. 1. Check for continuity between relay terminals No. 2 and 6. If continuity exists, replace relay. If continuity does not exist, go to next step.
  51. Reinstall interrupt relay. Disconnect security control module harness connector. Turn ignition switch to START position. Check voltage between ground and security control module harness connector terminal No. 15. See Figure . If voltage is 10 volts or greater, go to next step. If voltage is less than 10 volts, repair circuit between security control module and battery. See WIRING DIAGRAMS  .
  52. On A/T models, go to next step. On M/T models, go to step  56 .
  53. Turn ignition off. Disconnect inhibitor switch harness connector. Turn ignition switch to START position. Check voltage between ground and inhibitor switch harness connector terminal No. 12. See Fig 4 . If voltage is 10 volts or greater, go to next step. If voltage is less than 10 volts, repair circuit between interrupt relay and inhibitor switch harness connector.
    Fig 4: Identifying Inhibitor Switch Harness Connector Terminals
    G99J50046Courtesy of SUBARU OF AMERICA, INC.
  54. Place selector lever in Park or Neutral. Check resistance between inhibitor switch harness connector terminals No. 7 and 12. If resistance is less than one ohm, go to next step. If resistance is not less than one ohm, replace inhibitor switch.
  55. Check resistance between inhibitor switch harness connector terminal No. 7 and White/Blue wire at starter motor. If resistance is less than 10 ohms, replace security control module. If resistance is 10 ohms or greater, repair circuit between inhibitor switch and starter motor connector.
  56. Turn ignition off. Remove starter interlock relay. Check for continuity between starter interlock relay terminals No. 2 and 3. See Figure . If continuity exists, go to next step. If continuity does not exist, replace starter interlock relay.
  57. Check for continuity between starter interlock relay terminals No. 1 and 4. If continuity exists, replace starter interlock relay. If continuity does not exist, go to next step.
  58. Connect battery voltage to starter interlock relay terminal No. 3. Connect relay terminal No. 2 to ground. Check resistance between relay terminals No. 1 and 4. If continuity exists, go to next step. If continuity does not exist, replace starter interlock relay.
  59. Reinstall starter interlock relay. Depress clutch pedal. Check resistance between clutch switch harness connector terminals No. 1 and 2. See WIRING DIAGRAMS  . If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, replace clutch switch.
  60. Disconnect electrical connector from starter (White/Blue wire). Turn ignition switch to START position. Depress clutch pedal. Check voltage between ground and starter electrical connector. If voltage is 10 volts or greater, replace security control module. If voltage is less than 10 volts, repair circuit between interrupt relay and starter motor. See WIRING DIAGRAMS  .
  61. Disconnect harness connector from security control module and combination meter. Check resistance between security control module harness connector terminal No. 5 and combination meter 30-pin harness connector terminal No. 23. See Fig 3 and Figure . If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between combination meter and security control module harness connectors.
  62. Disconnect right front door switch harness connector. Check resistance between right front door switch harness connector terminal No. 1 (Brown/Red wire) and combination meter 30-pin harness connector terminal No. 28. If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between front door switch and combination meter harness connector.
  63. Remove combination meter from instrument panel. Check resistance between combination meter 30-pin connector terminals No. 23 and 28. See Fig 3 . If resistance is less than 10 ohms, replace security control module. If resistance is not less than 10 ohms, repair or replace combination meter.
  64. Disconnect harness connectors from security control module and combination meter. Check resistance between combination meter harness connector terminal No. 23 and security control module harness connector terminal No. 5. See Fig 3 and Figure . If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between combination meter and security control module harness connectors.
  65. Disconnect left rear door switch harness connector. Check resistance between rear door switch harness connector terminal No. 1 (Yellow/Red wire) and combination meter harness connector terminal No. 10. If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between left rear door switch and combination meter harness connectors.
  66. Remove combination meter from instrument panel. Check resistance between combination meter terminals No. 10 and 23. If resistance is less than 10 ohms, replace security control module. If resistance is 10 ohms or greater, repair or replace combination meter.
  67. Disconnect harness connectors from security control module and combination meter. Check resistance between security control module harness connector terminal No. 5 and combination meter harness connector terminal No. 23. See Fig 3 and Figure . If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between combination meter and security control module harness connectors. See WIRING DIAGRAMS  .
  68. Disconnect right rear door switch harness connector. Check resistance between right rear door switch harness connector terminal No. 1 (White/Green wire) and combination meter harness connector terminal No. 29. If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between right rear door switch and combination meter harness connectors.
  69. Remove combination meter from instrument panel. Check resistance between combination meter terminals No. 23 and 29. If resistance is less than 10 ohms, replace security control module. If resistance is 10 ohms or greater, repair or replace combination meter.
  70. Disconnect harness connectors from rear gate latch switch and security control module. Check resistance between rear gate latch switch harness connector terminal No. 1 (Yellow/Blue wire) and security control module harness connector terminal No. 4. If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between rear gate latch switch and security control module harness connectors.
  71. Check resistance between ground and rear gate latch switch harness connector terminal No. 2 (Black wire). If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between rear gate latch switch and ground.
  72. Check resistance between rear gate latch switch harness connector terminals. If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, replace rear gate latch switch.
  73. Press latch gate switch. Check resistance between rear gate latch switch harness connector terminals. If resistance is less than 10 ohms, replace latch gate switch. If resistance is 10 ohms or greater, replace security control module.
  74. Disconnect harness connectors from trunk room light switch and security control module. Check resistance of Yellow/Blue wire between trunk room light switch harness connector terminal No. 1 and security control module harness connector terminal No. 4. If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between trunk room light switch and security control module harness connector.
  75. Check resistance of Black wire between ground and trunk room light switch harness connector terminal No. 2. If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between trunk room light switch and ground.
  76. Check resistance between trunk room light switch harness connector terminals. If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, replace trunk room light switch.
  77. Press trunk room light switch. Check resistance between trunk room light switch harness connector terminals. If resistance is less than 10 ohms, replace trunk room light switch. If resistance is 10 ohms or greater, replace security control module.
  78. Ensure security control module is properly installed on bracket. If module is properly installed, go to next step.
  79. Adjust sensitivity adjustment screw (clockwise for more sensitivity) in security control module. Ensure plug is installed in adjusting hole after adjustment. Perform impact sensitivity test. If sensitivity adjustment is possible, system is normal. If sensitivity adjustment is not possible, replace security control module.
  80. Connect connectors at front pillar tower. Disconnect security control module harness connector. Check resistance between ground and security control module harness connector terminal No. 3. If resistance is less than 10 ohms, replace security control module. If resistance is 10 ohms or greater, repair circuit between security control module harness connector and ground. See WIRING DIAGRAMS  .
  81. Remove security system horn relay. Relay is secured to bracket near main fuse box. Check for continuity between security horn relay terminals No. 1 and 4. See Figure . If continuity does not exist, go to next step. If continuity exists, replace security horn relay.
  82. Check for continuity between security horn relay terminals No. 2 and 3. If continuity exists, go to next step. If continuity does not exist, replace security horn relay.
  83. Using jumper wires, connect battery voltage to security horn relay terminal No. 4 and ground terminal No. 1. Check for continuity between terminals No. 2 and 3. If continuity exists, go to next step. If continuity does not exist, replace security horn relay.
  84. Measure voltage between ground and security relay harness connector terminal No. 1. If voltage is 10 volts or greater, go to next step. If less than 10 volts exist, repair circuit between security horn relay and battery.
  85. Measure voltage between ground and security relay harness connector terminal No. 2. If voltage is 10 volts or greater, go to next step. If less than 10 volts exist, repair circuit between security horn relay and battery.
  86. Disconnect security control module harness connector. Measure resistance between security horn relay harness connector terminal No. 3 and security control module harness connector terminal No. 18. See Figure and Figure . If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between security horn relay and security control module.
  87. Measure resistance between security horn relay harness connector terminal No. 4 and security control module harness connector terminal No. 16. If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between security horn relay and security control module.
  88. Disconnect security horn harness connector. Measure resistance between security horn harness connector terminal and security control module harness connector terminal No. 17. If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair circuit between security horn and security control module.
  89. Remove security horn. Using jumper wires, momentarily connect security horn to battery. If horn sounds, replace security control module. If horn does not sound, replace security horn. After repair, check system for proper operation.
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