Kia Optima DL3: 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.
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 right wheels and left wheels when braking.
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.
Other information:
Kia Optima DL3 2019-2026 Service and Repair Manual: Temperature Control Actuator
Components and components location Components Location 1. Temperature control actuator [LH] 2. Temperature control actuator [RH] Description and operation Description The temperature control actuator is located at the heater unit.
Kia Optima DL3 2019-2026 Service and Repair Manual: Mode Control Actuator
Components and components location Components Location 1. Mode control actuator Description and operation Description The mode control actuator is located at the heater unit. It adjusts the position of the mode door by operating the mode control actuator based on the signal of the A/C co
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