Radio Preset Memory Is Lost
Radio preset memory is lost1. 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-HVAC display module.
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 A10 terminal 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 A20 terminal and body ground.
Is there continuity?
YES - Replace the audio-HVAC display module.
NO - An open wire between the audio unit A20 terminal and body ground (G504).