Circuit/System Testing

WARNING: This page is about a different car, the 2013 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Ignition OFF, disconnect the auxiliary audio jack harness connector.
Ignition ON, test for less than 1 volt between the left axuiliary audio signal terminal 6, to ground.
- If greater than the specified value, test the circuit for a short to voltage. If the circuit tests normal, replace the radio.
Test for less than 1 volt between the right axuiliary audio signal terminal 7, to ground.
- If greater than the specified value, test the circuit for a short to voltage. If the circuit tests normal, replace the radio.
Test for less than 1 volt between the axuiliary audio common signal terminal 5, to ground.
- If greater than the specified value, test the circuit for a short to voltage. If the circuit tests normal, replace the radio.
Ignition OFF, test for infinite resistance from the left axuiliary audio signal terminal 6, to ground.
- If less than the specified value, test the circuit for a short to ground. If the circuit tests normal, replace the radio.
Test for infinite resistance from the right axuiliary audio signal terminal 7, to ground.
- If less than the specified value, test the circuit for a short to ground. If the circuit tests normal, replace the radio.
If all of the circuits test normal, replace the auxiliary audio jack.