Push the OFF button of the front to turn off the air climate control system. You can still operate the mode and air intake buttons as long as the ignition switch is in the ON position.
Hyundai Sonata LF 2014-2019 Service Manual: External AMP Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Open the trunk, remove the right luggage side trim.
(Refer to Body - "Trunk Trim")
3.
Remove the external amplifier (B) after disconneting the connector (A) and loosening the mounting nuts.
Installation
1.
Install the exte ...
Hyundai Sonata LF 2014-2019 Service Manual: Special Service Tools
Special Service Tools
Tool(Number and Name)IllustrationUse09495-3K000Band installerInstallation of ear type boot band09495-33000PullerRemoval of spider assembly from a drive shaft.09495-39100Band installerInstallation of hook type boot band
...