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Circuit/System Testing

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  1. Ignition OFF, disconnect the harness connectors at the ECM.
  2. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 Ω between the following ground circuit terminals and ground:
    • Terminal 73 X1
    • Terminal 73 X2
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Verify that a test lamp illuminates between the 12V B+ circuit terminal 20 X1 and ground.
    • If the test lamp does not illuminate, test the 12V B+ circuit for a short to ground or an open/high resistance.
  4. If all circuits test normal, replace the ECM.
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