Sound from Wireless Headphones is Difficult to Hear, cannot be Heard, or Quality is Poor [08/2015 - 08/2019]: Procedure

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

   OK

   Battery is not depleted.

Result: 

NG 

REPLACE WIRELESS HEADPHONE (DRY-CELL 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: 

NG 

SET VOLUME TO HIGH AND 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

2. Check whether the same malfunction occurs.

   OK

   The function returns to normal.

Result: 

OK 

END 

Result: 

NG 

See step  4

1. Temporarily replace the wireless headphone with a known good or new one and check if the same problem occurs again.

   OK

   Same problem does not occur.

Result: 

OK 

END (WIRELESS HEADPHONE WAS DEFECTIVE) 

Result: 

NG 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 08/2019] )