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.
RPO Code UQA
- Ignition OFF, disconnect the radio X1 harness connector and the X3 amplifier harness connector.
- Ignition ON, test for less than 1 volt on the radio audio mute signal terminal 37 X1 at the radio.
- If greater then the specified value, test the circuit for a short to voltage.
- Test for less than 5 ohms between the radio X1 terminal 37 to the amplifier X3 terminal 11.
- If greater then specified range, test the circuit for an open/high resistance.