Circuit/System Testing
WARNING: This page is about a different car, the 2010 Chevrolet HHR. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the inside rearview mirror.
- 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.
- 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.
- 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.
- 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.
- 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.
- If all circuits test normal, replace the inside rearview mirror.