Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSHYUNDAI1991SONATA V6-3.0LREPAIR AND DIAGNOSISCRUISE CONTROLDESCRIPTION AND OPERATION
1991 Hyundai Sonata V6-3.0L
Cruise Control: Description and Operation
1991 Hyundai Sonata V6-3.0LSECTION Description and Operation
This speed control system is composed of a vehicle speed sensor which converts vehicle speed to pulse. The electronic control unit (ECU) receives signals from the sensor and control switches which controls all automatic speed control functions. The actuator regulates the throttle valve to set opening signals from the electronic control unit (ECU). This system has an alarm, when Set or Resume switches are On, the alarm sounds to notify driver that the control unit has received the On signal.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.