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.
Bright-metal maintenance
Aluminum wheel maintenanceHyundai Kona (OS) 2018-2026 Service Manual: Manifold Absolute Pressure Sensor (MAPS) Specifications
Specification
Pressure
[kPa (kgf/cm², psi)]
Output Voltage (V)
32.5 (0.33, 4.71)
0.5
284 (2.90, 41.19)
4.5
...
Hyundai Kona (OS) 2018-2026 Service Manual: Blower Resistor (Manual) Repair procedures
Inspection
1.
Measure the resistance between the terminals.
2.
The measured resistance is not within specification, the blower
resistor must be replaced. (After removing the resistor)
...