Hyundai Sonata: Description and Operation
Cruise Control
The cruise control system is engaged by the cruise "ON/OFF" main switch
located on right of steering wheel column. The system has the capability to
cruise, coast, accelerate and resume speed.
It also has a safety interrupt, engaged upon depressing brake or shifting
select lever.
The ECM is the control module for this system. The main components of
cruise control system are mode control switches, transmission range switch,
brake switch, vehicle speed sensor, ECM and ETS motor that connect throttle
body.
The ECM contains a low speed limit which will prevent system engagement
below a minimum speed of 40km/h (25mph).
The operation of the controller is controlled by mode control switches
located on steering wheel.
Transmission range switch and brake switch are provided to disengage the
The switches are on brake pedal bracket and transmission. When the brake pedal
is depressed or select lever shifted, the cruise control system is electrically
disengaged and the throttle is returned to the idle position.
Cruise main switch (ON/OFF)
The cruise control system is engaged by pressing the cruise "ON/OFF" main
switch. Pressing the cruise "ON/OFF" main switch again releases throttle, clears
cruise memory speed, and puts vehicle in a non-cruise mode.
Set/Coast switch (SET/–)
The "SET/–" switch located on right of steering wheel column has two functions.
The set function - Push the "SET/–" switch and release it at the desired
speed. The SET indicator light in the instrument cluster will illuminate. Release
the accelerator pedal. The desired speed will automatically be maintained.
The coast function - Push the "SET/–" switch and hold it when the cruise
control is on. The vehicle will gradually slow down. Release the switch at the
desired speed. The desired speed will be maintained.
Push the "SET/–" switch and release it quickly. The cruising speed will
decrease by 1.6km/h (1.0mph).
Resume/Accel switch (RES/+)
The "RES/+" switch located on right of steering wheel column has two functions.
The resume function - If any method other than the cruise “ON/OFF” main
switch was used to cancel cruising speed temporarily and the system is still
activated, the most recent set speed will automatically resume when the "RES/+"
switch is pushed. It will not resume, however, if the vehicle speed has dropped
below approximately 40km/h (25mph).
The accel function - Push the "RES/+" switch and hold it when the cruise
control is on. The vehicle will gradually accelerate. Release the switch at
the desired speed. The desired speed will be maintained.
Push the "RES/+" switch and release it quickly. The cruising speed will
increase by 1.6km/h (1.0mph).
Cancel switch (CANCEL)
The cruise control system is temporarily disengaged by pushing the "CANCEL"
switch.
Cruise speed canceled by this switch can be recovered by pushing the "RES/+"
switch.
Schematic Diagrams
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Disconnect the battery negative cable, and wait for at least three
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2.
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Limitation of Active ECO operation
If the following conditions occur while Active ECO is operating, the system operation
is limited even though there is no change in the ECO indicator.
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