Diagnostic Instructions
- Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle
- Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
- An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions
- The following information is for the IOR radio only- This radio has no built-in voice recognition, voice commands are dependent on the connected phone. The push to talk button on the steering wheel control will be inoperative when there is no phone device paired with the vehicle, this is a normal characteristic and no repair attempt should be make. The push to talk button, however, can still answer OnStar® Hands-free calls (if equipped). For the push to talk button to function a phone device must be Bluetooth connected and the native voice recognition app needs to be enabled (e.g. Siri or Google Assistant) on the connected device.