Corrosive materials used for ice and snow removal and dust control may collect on the underbody. If these materials are not removed, accelerated rusting can occur on underbody parts such as the fuel lines, frame, floor pan and exhaust system, even though they have been treated with rust protection.
Thoroughly flush the vehicle underbody and wheel openings with lukewarm or cold water once a month, after off-road driving and at the end of each winter. Pay special attention to these areas because it is difficult to see all the mud and dirt. It will do more harm than good to wet down the road grime without removing it. The lower edges of doors, rocker panels, and frame members have drain holes that should not be allowed to clog with dirt; trapped water in these areas can cause rusting.
WARNING
After washing the vehicle, test the brakes while driving slowly to see if they have been affected by water. If braking performance is impaired, dry the brakes by applying them lightly while maintaining a slow forward speed.
Hyundai Sonata LF 2014-2019 Service Manual: Seat Belt Pretensioner (BPT) Repair procedures
Removal
1.
Disconnect the battery negative cable, and wait for at least three minutes before beginning work.
2.
Remove the door scuff trim.
(Refer to Body - "Interior Trim")
3.
Remove the center pillar trim.
(Refer to Body - "Interior Trim")
4.
Loosen the seat belt pretensioner m ...
Hyundai Sonata LF 2014-2019 Owners Manual: ESC operation
ESC ON condition
When the ignition switch is in the ON position, the ESC and the ESC OFF indicator
lights illuminate for approximately three seconds and goes off, then the ESC is
turned on.
When operating
When the ESC is in operation, the ESC indicator light blinks:
When you apply your brakes u ...