An electronic throttle control actuator is responsible for metering air flow into the engine which controls engine speed. A throttle control sensor located near the foot pedal supplies feedback data to the computer which activates the actuator. The throttle control system is integrated into the ABS, cruise control and traction control systems. In older vehicles throttle action was performed by a manually controlled throttle cable which is actuated by the driver's right foot.
Only electricity really isn’t magic. Like most seemingly complicated things, automotive electrical systems are collections of very simple assemblies. And lucky for us, there’s no secret as to how these things work. It boils down to basic technique. Do a few things right and you’re assured many trouble-free years of service.
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