2010 Toyota Matrix Owners Manual - Page 201

3-2. Using the audio system --- The channel you selected is no longer available. Wait for about 2 seconds until the radio returns to the previous channel or "CH001". If it does not change automatically, select another channel. Contact the XM® Listener Care Center at 1-800-967-2346 (U.S.A.) or 1-877438-9677 (Canada).