1997 Cadillac Catera Owner's Manual - Page 159

CHEK DOOR or CD CHANGER DOOR OPEN is displayed when the CD changer door isleft open. Completely close the changer door to restore normal operation. CD CHANGER NO DISCS is displayed when an empty magazine is inserted in the CD changer. Try the magazine again witha disc loaded on one of the trays. (This message does notappear in thedisplay on the standard AM-FM Stereo radios.) Audio Steering Wheel Controls If any error occurs repeatedly or if an errorcannot be corrected, please contact your dealer.If your radio displays an error number, writeit down and provide it to your dealer when reporting the problem. Theft-Deterrent Feature Your Catera has a "built-in" theft-deterrent feature on each radio that is automatic -- there is no programming required. The radio in yourCatera cannot be used in any other vehicle besides another Catera if it were to be removed. Some audio controls can be adjusted at the steering wheel. They include the following: +: Pressing this buttonincreases volume. -: Pressing this buttondecreases volume. o (SOURCE): To change to a tape or CD, press this button. 3-20