CAUTION / NOTICE / HINT HINT:
PROCEDURE
(a) Check that the same problem does not occur in the sound heard from the speakers of another "Bluetooth" audio compatible vehicle of the same model. OK: The same problem does not occur in the sound heard from the speakers.
(a) Remove additional devices which use radio waves. (b) Play the portable player and check that the same problem does not occur in the sound heard from the speakers. OK: The same problem does not occur in the sound heard from the speakers.
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Seat Heater System(for Hv Model): Lost Communication with Front Seat Temperature Adjustment Switch LIN (B14B5)
DESCRIPTION The seat heater switch (radio and display receiver assembly) communicates with the air conditioning amplifier assembly via LIN communication. If the LIN communication system is malfunctioning, the air conditioning amplifier assembly will not operate even if the seat heater switch (radio ...