XM Radio Preset Memory Is Lost
XM Radio preset memory is lost1. Set each of the XM radio channel preset buttons.
Do each of the XM radio channel preset buttons set properly ?
YES - Go to step 2.
NO - Replace the audio unit.
2. Turn the ignition switch OFF for 1 minute, then turn it back to ON (II).
3. Test all of the XM radio channel preset buttons for proper recall operation.
Do the preset buttons recall the set radio stations?
YES - System is normal at this time. Check connections at the audio unit.
NO - Go to step 4.
4. Turn the ignition switch OFF.
5. Remove the audio-HVAC display module assembly, and disconnect the audio unit connector A (20P).
6. Measure voltage between the audio unit connector A10 terminal and body ground.
Is there battery voltage?
YES - Go to step 7.
NO - An open wire between the under-dash fuse/relay box and audio unit connector A10 terminal.
7. Check for continuity between the audio unit connector A20 terminal and body ground.
Is there continuity?
YES - Replace the audio unit.
NO - An open wire between the audio unit connector A20 terminal and body ground (G504).