Circuit/System Testing
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 GMC Savana, 2013 GMC RV Cutaway, 2013 GMC Cutaway, 2013 Chevrolet RV Cutaway, and 2013 Chevrolet Express. However, it is still accessible from the selected car via links, so may be relevant.
- Verify the OnStar® voice recognition is operating normally.
- If the OnStar® voice recognition is inoperative, refer to OnStar Microphone Malfunction .
- Ignition OFF, disconnect the radio harness connector X2 and CIM harness connector X2.
- Test for less than 1 volt on the voice recognition audio signal high circuit radio harness connector terminal 4 and ground.
- If greater than specified value, test the circuit for a short to voltage.
- Test for greater than 1 ohm between the voice recognition audio signal high circuit radio harness connector terminal 7 and ground.
- If less than specified value, test the circuit for a short to ground.
- Test for less than 1 ohm between the voice recognition audio signal high circuit radio harness connector terminal 7 and the voice recognition audio high signal circuit CIM harness connector terminal 1.
- If greater than specified value, test the circuit for an open/high resistance.
- Test for less than 1 volt on the voice recognition audio signal low circuit radio harness connector terminal 15 and ground.
- If greater than specified value, test the circuit for a short to voltage..
- Test for greater than 1 ohm between the voice recognition audio signal low circuit radio harness connector terminal 15 and ground.
- If less than specified value, test the circuit for a short to ground.
- Test for less than 1 ohm between the voice recognition audio signal low circuit radio harness connector terminal 15 and the voice recognition audio signal low circuit CIM harness connector terminal 2.
- If greater than specified value, test the circuit for an open/high resistance.
- If all circuits test normal, replace the radio.