Hyundai Sonata LF: Cruise Control System / Description and Operation
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 cruise control system. 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 (CRUISE) |
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.
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 2km/h or 1mph.
| 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 2km/h or 1mph.
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.
System Block Diagram
Component Parts And Function Outline
Component partFunctionVehicle-speed sensor, ESP/ABS Control ModuleConverts vehicle speed to pulse...
Other information:
Description
RCV (Recirculation Valve) Control Solenoid Valve is installed
on the cooling pan motor top and operates the RCV actuator which
controls the by-pass passage of the turbo-charger compressor.
When the throttle valve is closed during engine running
[Tip-out], crash noise of the impeller will occur because of rapid
increasing of the boost pressure...
Description
Crankshaft Position Sensor (CKPS) detects the crankshaft
position and is one of the most important sensors of the engine control
system. If there is no CKPS signal input, the engine may stop because of
CKPS signal missing.
This sensor is installed in ladder frame and generates
alternating current by magnetic flux field which is made by the sensor
and the target wheel when the engine rotates...
Schematic Diagrams