LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2011 >> Volt >> Repair and Diagnosis >> Body & Frame >> Ignition Switch/Steering Lock >> Immobilizer System >> Diagnostic Information and Procedures >> DTC B2955 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the K89 immobilizer control module.
  2. Ignition OFF, test for less than 30 Ω between the low reference circuit terminal 1 and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  3. Connect a test lamp between the B+ circuit terminal 3 and ground.
  4. While observing the test lamp, turn the ignition ON. The test lamp should illuminate for three seconds.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. Test for 12-13 V between the serial data circuit terminal 2 and ground.
    • If less than the specified range, test the serial data circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
    • If greater than the specified range, test the serial data circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
  6. If all circuits test normal, replace the K89 immobilizer control module. Verify DTC B2955 is not set.
    • If the DTC is set, replace the K9 BCM.
scientia non olet · About LEMON Manuals