Description of Cruise Control System Components and Functions

WARNING: This page is about a different car, the 2010 Suzuki Kizashi. However, it is still accessible from the selected car via links, so may be relevant.

COMPONENT FUNCTION CHART

Component	Function
ECM and electric throttle body	ECM executes centralized control over all functions including setting a constant speed, resuming it, setting coast, and cancelling cruise control minimum limit speed. ECM controls electric throttle valve opening to keep actual vehicle speed at set (target) speed.
MAIN (ON/OFF) switch	This switch has a momentary contact type button to turn cruise control function ON and OFF.
SET/COAST switch	When this switch is pressed (ON) and then released (OFF) while vehicle is running at a speed 40 km/h (25 mile/h) or higher, vehicle speed at that OFF moment is stored in memory and it is maintained (constant cruising). When this switch (ON) is continuously pressed during constant cruising, vehicle speed will continually decrease as long as switch is ON. When it is released (OFF), vehicle speed at that moment is stored in memory and vehicle starts constant cruising. Pressing this switch (ON) during constant cruising decreases vehicle speed according to number of times the switch is pressed.
RES/ACC switch	When this switch is pressed (ON) during constant cruising, vehicle speed will continually increase as long as switch is ON. When it is released (OFF), vehicle speed at that moment is stored in memory and vehicle starts constant cruising. If vehicle speed is higher than 40 km/h (25 mile/h) after cruise control is canceled, pressing this switch ON momentarily will resume vehicle running at the speed. Pressing this switch (ON) during constant cruising increases vehicle speed according to number of times the switch is pressed.
CANCEL switch	When this switch is pressed (ON), cruise control (throttle valve control) is canceled.
Wheel speed sensor (vehicle speed signal)	ECM receives speed sensor signal from ESP® control module through CAN communication and calculates vehicle speed using that signal.
Brake light switch	Brake light switch has 2 contact points. One contact point closes when brake pedal is depressed to light brake light and provide a voltage signal to the ECM. The other contact point (brake pedal position switch) opens when brake pedal is depressed to shut off power to cruise control of ECM, thereby cancelling cruise control (throttle valve control). This switch is installed to cancel cruise control (constant cruising).
Clutch pedal position switch (M/T model)	When clutch pedal is depressed, clutch pedal position switch closes and provides a ground signal to ECM. ECM cancels cruise control (throttle valve control) when this signal is inputted.
TCM (CVT model)	TCM sends shift position signal and manual mode gear position signal through CAN communication to ECM.
"CRUISE" indicator light	In the state with ignition mode of keyless push start system in "ON" and cruise control system OFF, pressing MAIN (ON/OFF) switch once and releasing it will activate the cruise control system and ECM will cause indicator light to light up.
"SET" indicator light	Lights up when cruise control (throttle valve control) is functioning.