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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the inside rearview mirror.
  2. Doors closed, courtesy lamps OFF, test for less than 5 ohms between the ground circuit terminal 8 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, command the green LED OFF with a scan tool. Test for less than 1 volt between the control circuit terminal 14 and ground.
    • If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the CIM.
  4. Command the green LED ON with a scan tool. Test for greater than 9 volts between the control circuit terminal 14 and ground.
    • 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 CIM.
  5. Command the red LED OFF with a scan tool. Test for less than 1 volt between the control circuit terminal 15 and ground.
    • If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the CIM.
  6. Command the red LED ON with a scan tool. Test for greater than 9 volts between the control circuit terminal 15 and ground.
    • 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 CIM.
  7. If all circuits test normal, test or replace the inside rearview mirror.
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