Audio System Symptom Troubleshooting - Radio preset memory is lost

Radio preset memory is lost

1. Inspect the under-dash No. 6 (10 A) fuse.

Is it OK?

YES | - | Go to Step 2 .
NO | - | Replace the fuse and reset. If it fails again, repair the short to ground in the harness.■

1. Remove the audio-HVAC display module.

1. Turn the ignition switch ON (II).

1. Measure voltage between the audio unit connector A10 terminal and body ground.

Is there battery voltage?

YES | - | Go to Step 5 .
NO | - | An open wire between the under-dash fuse/relay box N11 terminal and audio unit A10 terminal.■

1. Check for continuity between the audio unit A20 terminal and body ground.

Is there continuity?

YES | - | Faulty audio unit.■
NO | - | An open wire between the audio unit A20 terminal and body ground (G504).■

1. Operate 1 of 6 preset switches to see the symptom appear.

Does the symptom appear?

YES | - | Faulty audio unit.■
NO | - | Operation is normal.■