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Circuit/System Testing

  1. Ignition OFF, disconnect the Door Unlock relay, the Door Lock relay and the X2 harness connector at the underhood fuse block.
  2. Test for less than 1 ohm between the control circuit terminal 23 and the relay circuit terminal listed below:
    • Door Unlock relay terminal 2
    • Door Lock relay terminal 2
    • If greater than the specified range, test the control circuit for short to voltage or an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal listed below and ground:
    • Door Unlock relay terminal 5
    • Door Unlock relay terminal 1
    • Door Lock relay terminal 1
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. Ignition OFF, connect the Door Unlock relay.
  5. Ignition ON, verify that a test lamp illuminates between the control circuit terminal 23 and ground.
    • If the test lamp does not illuminate, test the control circuit for a short to ground. If the circuit tests normal, test or replace the Door Unlock relay.
  6. Ignition OFF, connect the Door Unlock relay and disconnect the Door Lock relay.
  7. Ignition ON, verify that a test lamp illuminates between the control circuit terminal 23 and ground.
    • If the test lamp does not illuminate, test the control circuit for a short to ground. If the circuit tests normal, test or replace the Door Lock relay.
  8. If all circuits test normal, replace the underhood fuse block.
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