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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the A10 inside rear view mirror.
  2. Doors closed, courtesy lamps OFF, test for less than 10 Ω between the ground circuit terminal 5 and ground.
  3. If greater than the specified range, test the ground circuit for an open/high resistance.
  4. Ignition ON, command the green LED OFF with a scan tool. Test for less than 1 V between the control circuit terminal 6 and ground.
  5. If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K73 telematics communication interface control module.
  6. Command the green LED ON with a scan tool. Test for greater than 9 V between the control circuit terminal 6 and ground.
  7. If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K73 telematics communication interface control module.
  8. Command the red LED OFF with a scan tool. Test for less than 1 V between the control circuit terminal 7 and ground.
  9. If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K73 telematics communication interface control module.
  10. Command the red LED ON with a scan tool. Test for greater than 9 V between the control circuit terminal 7 and ground.
  11. If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K73 telematics communication interface control module.
  12. If all circuits test normal, replace the A10 inside rear view mirror.
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