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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the B55 hood ajar switch.
  2. Ignition OFF, test for less than 10 Ω between the ground circuit terminal C and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, test for B+ between the signal circuit terminal B and ground
    • If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  4. Ignition OFF, disconnect the harness connector X4 at the K9 BCM.
  5. Ignition ON, test for less than 1 V between the signal circuit terminal C and ground.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
  6. If all circuits test normal, test or replace the B55 hood ajar switch.
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