Poor Sound Quality in All Modes (Low Volume) [12/2019 - 10/2022]: Procedure

1. Set treble, middle and bass to the initial values and check that the sound is normal.

   OK

   The sound returns to normal.

   HINT: 

   Sound quality adjustment measures vary according to the type of amplifier.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

See step  2

1. Compare with another vehicle of the same model which is not malfunctioning to see if there is any difference in the sound quality.

   OK

   No difference is found.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [12/2019 - 10/2022]