Kia Optima: Brake system / Hill-start assist control (HAC)
A vehicle has the tendency to roll back on a steep hill when it starts to go after stopping. The Hill-start Assist Control (HAC) prevents the vehicle from rolling back by applying the brakes automatically for about 2 seconds. The brakes are released when the accelerator pedal is depressed or after about 2 seconds.
The HAC is activated only for about 2 seconds, so when the vehicle is starting off always depress the accelerator pedal.
WARNING - Maintaining Brake Pressure on Incline
HAC does not replace the need to apply brakes while stopped on an incline. While stopped, make sure you maintain brake pressure sufficient to prevent your vehicle from rolling backward and causing an accident. Don’t release the brake pedal until you are ready to accelerate forward.
Vehicle stability management (VSM)
This system provides further enhancements to vehicle stability and steering responses
when a vehicle is driving on a slippery road or a vehicle detects changes in coefficient
of friction between r ...
Good braking practices
Check to be sure the parking brake is not engaged and the parking brake
indicator light is out before driving away.
Driving through water may get the brakes wet. They can also get wet when
...
Other information:
Kia Optima DL3 2019-2025 Service and Repair Manual: Overdrive Clutch Control Solenoid Valve (OD/C_VFS)
Specifications Specification Item Specification Control type N/H (Normal High) Control pressure (kpa (kgf/cm², psi)) 0 - 1,569.06 (0 - 16, 0 - 227.57) Currency (mA) 0 - 1 ...
Kia Optima DL3 2019-2025 Service and Repair Manual: Walk-in Switch
Components and components location Component Location 1. Walk-in switch Repair procedures Removal When prying with a flat-tip screwdriver or use a prying trim tool, ...
