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Home >> GMC >> 2010 >> Terrain SLE, 3.0 Y, AWD >> Repair and Diagnosis >> Body & Frame >> Ignition Switch/Steering Lock >> Immobilizer System >> Diagnostic Information and Procedures >> DTC B2955 >> Circuit/System Testing

Circuit/System Testing

  1. Inspect all available vehicle keys that they are correct vehicle keys.
    • If not a correct vehicle key, replace the key.
  2. 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
    • If less than the specified range, test the appropriate signal circuit for a short to ground.
  3. 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
    • If greater than the specified range, test the appropriate signal circuit for a short to voltage.
  4. 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
    • If greater than the specified range, test the appropriate signal circuit for an open/high resistance.
  5. If all circuits test normal, replace the K64 Content Theft Deterrent Control Module and verify that the customer concern is not still present.
    • If the customer concern is still present, replace the K9 Body Control Module.