Set bass, mid-range and treble to the initial values and check that sound is normal.
Malfunction disappears.
The bass, mid-range and treble settings are independent for each mode (e.g., radio, CD, etc.).
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Compare with another vehicle of the same model which does not have trouble to see if there is any difference in the sound quality.
No difference is found.
| Proceed to |
|---|
| OK |
| NG |
OK
NG