For details, refer to the Blue Link® Owner's Guide, Navigation Manual or Audio Manual.
Hyundai Elantra AD (2016-2020) Owners Manual: Rear seat warmers
While the engine is running, push either of the switches to warm the rear seat.
During mild weather or under conditions where the operation of the seat warmer
is not needed, keep the switches in the OFF position.
Each time you push the switch, the temperature setting of the seat is changed
a ...
Hyundai Elantra AD (2016-2020) Service Manual: Components and Components Location
Component Location
[Engine Room]
1. Engine room junction block
[Interior Relay]
1. Smart junction block (SJB)
...