Symptom Troubleshooting

Audio System Symptom Troubleshooting - Radio preset memory is lost

Radio preset memory is lost

NOTE:

- Check the vehicle battery condition first Battery Test.
- Check the connectors for poor connections or loose terminals.
- If only XM stations are lost, go to XM radio preset memory is lost Symptom Troubleshooting.
- Make sure the remotes are linked. Do this by checking to see if the MID displays "Welcome Drv 1" or "Welcome Drv 2" when you turn the ignition switch to ON (II).

1. Turn the ignition switch to ON (II).

2. Turn on the audio unit, and set each of the radio station preset buttons.

Does each preset button set properly?

YES -

Go to step 4.

NO -

Go to step 3.

3. Measure the voltage between audio unit connector A (20P) terminal No. 10 and body ground.





Is there battery voltage?

YES -

Go to step 4.

NO -

Repair an open in the wire between the No. 5 (7.5 A) fuse and driver's under-dash fuse/relay box and audio unit connector A (20P) terminal No. 10.

4. Measure the voltage between audio unit connector A (20P) terminal No. 20 and body ground.





Is there less than 0.2 V?

YES -

Go to step 5.

NO -

Repair an open in the wire between audio unit connector A (20P) terminal No. 20 and body ground (G504).

5. Turn the ignition switch to LOCK (0) for 1 minute, then back to ON (II).

6. Test 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 -

Substitute a known-good audio unit Audio Unit Removal / Installation, and recheck. If the symptom/indication goes away, replace the original audio unit Audio Unit Removal / Installation.