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Home >> Saab >> 2010 >> 9-5 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Theft Protection >> Fault diagnosis, fault codes >> DTC B2955: Security Sensor Data Circuit Malfunction >> Circuit/System Testing

Circuit/System Testing

  1. Inspect all available vehicle keys that they are correct vehicle keys.
  2. If not a correct vehicle key, replace the key.
  3. Ignition OFF, disconnect the harness connector at the K64 Content Theft Deterrent Control Module and disconnect the harness connector X3 at the K9 Body Control Module, test for infinitive resistance between the signal circuit listed below and ground.
    • K9 Body Control Module terminal 1 X3
    • K9 Body Control Module terminal 2 X3
    • K9 Body Control Module terminal 3 X3
  4. If less than the specified range, test the appropriate signal circuit for a short to ground.
  5. Test for less than 0.3 V between the signal circuit listed below and ground:
    • K9 Body Control Module terminal 1 X3
    • K9 Body Control Module terminal 2 X3
    • K9 Body Control Module terminal 3 X3
  6. If greater than the specified range, test the appropriate signal circuit for a short to voltage.
  7. Test for less than 5 Ω between the signal circuit terminal listed below at the K9 Body Control Module and the signal circuit terminal listed below at the K64 Content Theft Deterrent Control Module.
    • K9 Body Control Module terminal 1 X3 and K64 Content Theft Deterrent Control Module terminal 1
    • K9 Body Control Module terminal 2 X3 and K64 Content Theft Deterrent Control Module terminal 2
    • K9 Body Control Module terminal 3 X3 and K64 Content Theft Deterrent Control Module terminal 3
  8. If greater than the specified range, test the appropriate signal circuit for an open/high resistance.
  9. If all circuits test normal, replace the K64 Content Theft Deterrent Control Module and verify that the customer concern is not still present.
  10. If the customer concern is still present, replace the K9 Body Control Module.


  1. Ignition OFF, disconnect the harness connector at the K38 Intrusion Sensor Module.
  2. Test for less than 12 Ω between the ground circuit terminal 5 and ground.
  3. If greater than the specified range, test the ground circuit for an open/high resistance.
  4. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 3 and ground.
  5. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  6. Disconnect the X6 harness connector at the K9 Body Control Module.
  7. Test for less than 1 V between the serial data circuit terminal 16 and ground.
  8. If greater than the specified range, test the serial data circuit for a short to voltage.
  9. Ignition OFF, test for infinite resistance between the serial data circuit terminal 16 and ground.
  10. If not the specified value, test the serial data circuit for a short to ground.
  11. Test for less than 5 Ω between the serial data circuit terminal 16 at the K9 Body Control Module. harness connector X6 and the serial data circuit terminal 4 at the K38 Intrusion Sensor Module harness connector.
  12. If greater than the specified range, test the serial data circuit for an open/high resistance.
  13. If all circuits test normal, replace the K38 Intrusion Sensor Module. If the DTC resets, replace the K9 Body Control Module.
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