Sound from Wireless Headphones is Difficult to Hear, cannot be Heard, or Quality is Poor [12/2019 - 10/2022]: Procedure

1. Check that the dry-cell battery of the wireless headphone is not depleted.

   OK

   Battery is not depleted.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE WIRELESS HEADPHONE BATTERY 

Result: 

OK 

See step  2

1. Check the wireless headphone settings.
   1. Check that the volume is not set to "0".
   2. Check that mute is off.

      OK

      The volume is not set to "0" and mute is off.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

SET VOLUME TO HIGH OR TURN MUTE OFF 

Result: 

OK 

See step  3

1. Clean the infrared ray receiving portion on the television display assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Example

2. Check if the malfunction recurs.

   OK

   The wireless headphone returns to normal.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

See step  4

1. Replace the wireless headphone with a new or known good one and check if the malfunction recurs.

   OK

   The wireless headphone operates normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (WIRELESS HEADPHONE WAS DEFECTIVE) 

Result: 

NG 

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