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.
Speed Control Actuator
The speed control module provides signals to the actuator. The actuator moves the throttle by means of an internal geartrain and an actuator cable. The vehicle speed sensor generates the reference signal that the actuator compares to the set speed selected by the driver. If a discrepancy exists the speed control actuator will adjust the throttle, correcting the vehicle speed.
The speed control actuator is mounted behind the LH headlamp. The speed control actuator incorporates the following components:
- An electronic module
- An actuator consisting of a stepper motor and geartrain electromagnetic coupling and reduction gearing
The speed control actuator evaluates the incoming speed signal from the speed sensor and switch inputs. It adjusts the throttle to maintain a constant vehicle speed.
If the clutch pedal (vehicles with manual transaxle) or the brake pedal is pressed, the speed control actuator deactivates the speed control. The actuator will enter a stand-by mode.
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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.