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Circuit/System Testing

WARNING: This page is about a different car, the 2010 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the X1 harness connector at the K84 keyless entry control module.
  2. Ignition ON, test for less than 1 V between the signal circuit terminal 11 and ground.
    • If greater than the specified range, test the signal circuit for a short to voltage.
  3. Ignition OFF, connect the X1 harness connector at the K84 keyless entry control module. Disconnect the harness connector at the S38 ignition mode switch.
  4. Wait 2 minutes, test for less than 15 Ω between the low reference circuit terminal 7 and ground.
    • If greater than specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K84 keyless entry control module.
  5. Verify that a test lamp illuminates between signal circuit terminal 3 and ground.
    • If the test lamp does not illuminate, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K84 keyless entry control module.
  6. If all circuits test normal, test or replace the S38 ignition mode switch.