Radio Preset Memory Is Lost
Radio preset memory is lostNOTE: If only XM stations are lost, go to XM radio preset memory is lost.
1. Set each of the radio station preset buttons.
Do each of the 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 the 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. Inspect the under-dash fuse/relay box No. 6 (10 A) fuse.
Is it OK?
YES - Go to step 5.
NO - Replace the fuse and reset. If it fails again, repair the short to ground in the harness.
5. Remove the audio-HVAC display module.
6. Turn the ignition switch ON (II).
7. Measure voltage between the audio unit connector A (20P) terminal No. 10 and body ground.
Is there battery voltage?
YES - Go to step 8.
NO - An open wire between the under-dash fuse/relay box and audio unit A10 terminal.
8. Check for continuity between the audio unit connector A (20P) terminal No.10 and body ground.
Is there continuity?
YES - Replace the audio unit.
NO - An open wire between the audio unit connector A (20P) terminal No. 10 and body ground (G504).