General Safety Information and Caution

General Safety Information and Caution

Be careful when driving the vehicle using the smart cruise control system as follows.

• The smart cruise control system may have limits to detect distance to the vehicle ahead due to road and traffic conditions. • On curves or inclines/declines - On curves or inclines/declines, the smart cruise control system may not detect a moving vehicle in your lane, and then your vehicle may accelerate to the set speed directly. Also, the vehicle speed may slow down abruptly when the vehicle ahead is recognized. Select the appropriate set speed on curves or inclines/declines and control the vehicle speed by applying the brake pedal if necessary. - Your vehicle speed can be reduced due to a vehicle in the adjacent lane. Apply the accelerator pedal and select the appropriate set speed. Check to be sure that the road conditions permit. • Lane changing - A vehicle which moves into your lane from an adjacent lane cannot be recognized by the sensor until it is in the sensor's detection range. - Be always cautious because a vehicle which suddenly moves into your lane can be recognized late by the sensor. - If the vehicle which moves into your lane is slower than your vehicle, the speed may decrease to maintain the distance to the vehicle ahead. - If the vehicle which moves into your lane is faster than your vehicle, your vehicle will maintain the selected speed even the vehicle is in the sensor's detection range. • Vehicle recognition - Even though a vehicle is in the same lane, a vehicle which is out of the sensor’s detection range cannot be recognized by the sensor. 1) Small vehicle such as motorcycle, bicycle and cultivator 2) A vehicle offset to one side 3) A slow-moving vehicle or sudden-decelerating vehicle 4) A stopped vehicle 5) A vehicle with small rear profile such as trailer with no loads - In this following situation, the front vehicle can’t be recognized correctly so control the vehicle speed by applying the brake pedal or accelerator pedal if necessary. 1) When the vehicle is pointing upwards due to overloading in the trunk 2) While making turns by steering 3) When driving to one side of the lane 4) When driving on narrow lanes or on curves • If the smart cruise control is left on (CRUISE indicator light ON), the smart cruise control can be switched on accidentally. Keep the smart cruise control system off (CRUISE indicator light OFF) when the smart cruise control is not in use, to avoid inadvertently setting a speed. • Observe a regulation speed on road when setting the cruise speed. • Use the smart cruise control system only when traveling on open highways in good weather. Do not use the smart cruise control when it may not be safe to keep the car at a constant speed, for instance, driving in heavy or varying traffic, or on slippery (rainy, icy or snow-covered) or winding roads or over 6% up-hill or down-hill roads. • Pay particular attention to the driving conditions whenever using the smart cruise control system. • The vehicle cannot be stopped by using the smart cruise control system. If emergency stop is necessary, you should apply the brakes. • Keep the safety distance according to road conditions and vehicle speed. If the following distance is too close at a high speed driving, it is dangerous. • The smart cruise control system can not recognize a stopped vehicle, pedestrians or an oncoming vehicle. Always look ahead cautiously to prevent unexpected and sudden situations from occurring. • The smart cruise control system is not a substitute for safe driving practices but a supplementary function only. It is the responsibility of the driver to always check the speed and the distance to the vehicle ahead. • In front of you, vehicles moving with a frequent lane change may cause a delay in the system's reaction or may cause the system to react to a vehicle actually in adjacent lane. Always look ahead cautiously to prevent unexpected and sudden situations from occurring. • Your vehicle may accelerate when a vehicle ahead of you disappears. When you are warned that the vehicle ahead of you is not detected, drive with caution. • When vehicles are at a standstill and the vehicle in front of you changes to the next lane, be careful when your vehicle starts to move because it may not recognize the stopped vehicle in front of you. • Always look out for pedestrians when your vehicle is maintaining a distance with the vehicle ahead. • Always be cautious for vehicles with higher height or vehicles carrying loads that sticks out to the back of the vehicle.

Schematic Diagrams

Trouble Symptom Charts

Component Parts And Function Outline

Component part	Function
Cruise Control Switch	Input the set speed and distance to the SCC ECU.
Instrument Cluster	Display various information inputted from SCC.
Smart Cruise Control Unit	Recognize and track the vehicle ahead. Calculate the target speed and distance Request the acceleration and retardation to ESP
VDC (HECU)	Automatic braking and request the engine torque control to the engine (ECM) Request the EPB torque control to the Electronic Parking Brake (EPB) Request the stop lamp indicator ON
Engine (ECM)	Control the engine torque
Stop lamp	Stop lamp indicator ON

Description and Operation

Description

The smart cruise control system allows a driver to program the vehicle to control the speed and following distance detecting the vehicle ahead without depressing the brake pedal and the accelerator pedal.

1.	Cruise speed control: The vehicle maintains the selected speed if there are not vehicles ahead.

2.	Retardation control: The vehicle decelerates if a vehicle ahead is detected.

3.	Following distance control: The vehicle maintains the selected following distance.

4.	Acceleration control: The vehicle accelerates to the selected speed if a vehicle ahead is not detected.

5.

Control on curves (1) The sensor may not detect a vehicle ahead or may detect a vehicle on other lanes because the detection range of the sensor is limited. (2) On curves, if the vehicle equipped the SCC is driving at high speed, the vehicle can slip outside. Therefore reduce the speed on curves even there is not a vehicle ahead. (There is no brake control by SCC.) (3) While the vehicle follows a vehicle ahead on straight road, if the vehicle ahead enters on curve, the vehicle equipped the SCC may accelerate to follow the vehicle ahead. (4) On curves, if a vehicle ahead followed is out of range, the vehicle does not accelerate to the set speed and maintain the following speed to prevent from accelerating and decelerating repeatedly. (If the vehicle equipped the SCC changes the lane or apply the accelerator pedal, the vehicle will accelerate.)

6.

Warning alarm If the vehicle equipped the SCC decelerates because a vehicle ahead decelerates or moves into your lane, the warning will operate. (1) In case that the vehicle equipped with SCC is able to decelerate properly by the system – No warning (2) In case that the vehicle equipped with SCC is not able to decelerate properly by the system A. Indicator in the cluster will blink and the warning buzzer will sound. (The warning and deceleration by the system will go on until the brake pedal is applied.) (3) If the vehicle ahead (vehicle speed: less than 30km/h) disappears to the next lane during following distance control, the warning chime will sound and a message will appear. Adjust your vehicle speed for vehicles or objects that can suddenly appear in front of you.

7.

Accelerating by driver Even the vehicle is being decelerated by the SCC system, the vehicle can be accelerated by applying the accelerator pedal. If the vehicle is accelerated above the set speed, the indicator in the cluster will blink. • Smart cruise control operating conditions - Vehicle speed at approximately 0 ~ 160km/h (0 ~ 99.4mph) - Transmission in D or Sports mode - "ESP OFF" switch OFF - "ESP OFF" switch OFF - "CRUISE" switch ON (CRUISE indicator ON) Under the above conditions, activate the cruise system using the "SET/–" or "RES/+" switch. • Smart cruise control disabling conditions - "CRUISE" switch OFF - "CANCLE" switch ON - Brake pedal applied - Driver’s door opened - Vehicle speed at more than approximately 170km/h (105mph) - Transmission in N or P or R - ESP/ TCS / ABS operating - An accelerator pedal applied for more than 5min - ESP OFF" switch ON (ESP OFF indicator ON) - Parking brake applied - System failure (The warning indicator ON) - Crack, damage or wrong installation of smart cruise control unit cover (The warning indicator ON)

8.

Function of cruise control The driver may choose to only use the cruise control mode (speed control function) by doing as follows: With the smart cruise control system on (the cruise indicator light will be on but the system will not be activated), push the distance to distance switch for more than 2 seconds. "Smart cruise control (SCC) mode" and "Cruise control (CC) mode" can be selected.The speed control of the cruise control mode is the same as that of the smart cruise control mode. When using the cruise control mode, the driver must manually access the distance to other vehicles as the system will not automatically brake to slow down for other vehicles.

Cruise main switch (CRUISE)

The smart cruise control system is engaged by pressing the cruise "ON/OFF" main switch. When the smart cruise control system is engaged, the CRUISE indicator in the cluster illuminates.

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.

At low speed of 10 ~ 30 km/h (0 ~20 mph), there should be a vehicle in front of driver’s vehicle. The target speed is set to 30km/h (20 mph).

The coast function - Push the "SET/–" switch and hold it when the smart 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 1.0km/h or 1.0mph.

• If the vehicle speed is above the set speed by applying the accelerator pedal, the vehicle speed will be the set speed.

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.

The accel function - Push the "RES/+" switch and hold it when the smart 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 1.0km/h or 1.0mph.

Cancel switch (CANCEL)

The cruise control system is temporarily disengaged by pushing the "CANCEL" switch.

Following distance control switch

This system assists you can set the distance from the vehicle ahead and maintain the selected distance even if you did not push the accelerator or the brake pedal.

Select the appropriate following distance according to road conditions and vehicle speed.

Each time the button is pressed, the following distance changes as follows:

Ex) Distance 4 > Distance 3 > Distance 2 > Distance 1> Distance 4

If you drive at 90 km/h (55.9mph), the distance maintain as follows;

Distance 4 - approximately 52.5m (172.2ft)

Distance 3 - approximately 40m (131.2ft)

Distance 2 - approximately 32.5m (106.6ft)

Distance 1 - approximately 25m (82.0ft)

The following distance of each stage is changed according to the speed of the vehicle ahead.

Display in the cluster

Display	Description
	Distance 1 - with a vehicle ahead
	Distance 2 - with a vehicle ahead
	Distance 3 - with a vehicle ahead
	Distance 4 - with a vehicle ahead
	SCC system malfunction

Smart Cruise Control Unit Description and Operation

Description

The smart cruise control unit is installed on the front of the chassis.A radar sensor is embedded in the front section of the unit. This sensor detects vehicles and objects in front of the vehicle. The alarm goes off when the vehicle deviates from the horizontal and vertical alignment reference points during operation. This sensor communicates with the dashboard, warning buzzer, smart cruise control switch, Electronic Stability Program (ESP), ECM, and TCM via CAN communication.The sensor controls vehicle speed through CAN communication between the Electronic Stability Program (ESP) system and the ECM and TCM.

Smart Cruise Control Unit Specifications

Specification

Item	Specification
Power supply(V)	12
Operation voltage (V)	9 ~ 16

Smart Cruise Control Unit Schematic Diagrams

Circuit Diagram

Smart Cruise Control Unit Repair procedures

Removal

1.	Remove the bumper. (Refer to Body - "Front Bumper")

2.	Disconnect the smart cruise control unit connector (A).

3.	Remove the smart cruise control unit assembly (B) from vehicle after loosening mounting bolts.

Installation

1.	Install in the reverse order of removal.

2.	Align the smart cruise control sensor. (Refer to Engine Electrical System - "Smart Cruise Control(SCC) Alignment")

3.	Install the bumper cover. (Refer to Body - "Front Bumper Cover")

Smart Cruise Control (SCC) Sensor Alignment

The objective of the alignment is to ensure correct SCC performance. In order for the sensor to perform correctly, the sensor must be aligned correctly. The sensor alignment has major impact on road estimation, lane prediction, and target processing. When the sensor is misaligned, the performance of SCC cannot be guaranteed. Therefore, when the sensor is reinstalled or a new sensor is installed on a vehicle, the sensor shall be aligned by service personnel.

• The sensor must be aligned when; - The sensor is reinstalled after removing. - A new sensor is installed on a vehicle. - The sensor or nearby parts are impacted in a collision. - The sensor can not recognize a vehicle ahead.

• The sensor can not recognize a vehicle ahead. - Remove heavy objects, such as luggage in the trunk, from the vehicle. - Remove heavy objects, such as luggage in the trunk,from the vehicle. - Check wheel alignment. - Check the pollution condition of sensor cover

Smart Cruise Control (SCC) Radar Alignment

1.

Stop the vehicle horizontally at a flat place. • Adjustment may not be accurate if the installation surface height and angle of the vehicle and reflector are different. • Perform in an area with minimum clearance of 8m front, 4m sides, and 1.2m above the vehicle. • Remove heavy objects from inside of the vehicle (seating area and trunk). • Ensure that all tires are filled with spec air pressure. • Remove objects (metal plates, resins, etc.) that may cause electric signal interference from the area where sensor alignment is performed. • Be sure that the vehicle is not moved and free from vibration when performing sensor alignment (getting in/out or opening/closing doors). • Check that radiator grill and sensor cover is not dirty. • Check that the wheel alignment is normal. • Do not turn OFF the power when performing sensor alignment. • Power supplied to the radar sensor must be between 9V~16V. • Temperature in the area where sensor alignment is performed must be between -30~60°C.

2.	Mark the center point of emblem (A) and the center point on top of wind glass (B).

3.	Connect the SCC Calibration Laser (SST No. : 09964-C1200) to the Tri-Pod (SST No. : 09964-C1300).

4.	Match the vertical line of laser to (A) and (B) using the SCC calibration laser pointer.

5.	Mark (C) located in 1.0~ 3.8m from (A) in front of the vehicle.

6.	Disconnect the SCC Calibration Laser (SST No. : 09964-C1200) from the Tri-Pod (SST No. : 09964-C1300).

7.	Align the vertical weight of the with the point (C).

8.	Connect the reflector(SST No. : 09964-C1100) to the tripod(SST No. : 09964-C1300) and set the reflector center height to 344mm.

9.	Set the reflector horizontal using the leveler which is built in the tripod(SST No. : 09964-C1300). • Balance the level so that the bubble in the level is set between the spec lines.

10.	Remove the vertical weight. • Visually check that the reflecting side of the reflector is levelled with the front of the vehicle.

11.	Check again the radar sensor and the surface of front bumper for the following items with the eyes. • Make sure that there is no debris, or reflecting object on the surface of the radar. • Make sure that there is no debris, or reflecting object on the radiator grill.

12.	Connect the GDS to the DLC of the vehicle and start sensor alignment. • If the engine is running, the vibration may cause inaccurate sensor alignment, so perform sensor alignment in IG ON mode.

13.	After correctly selecting the vehicle model, select "SCC Alignment" from the auxiliary functions in GDS Menu.

14.	Perform sensor alignment by following the directions shown in the GDS monitor.

15.	In case of sensor alignment failure, check the alignment conditions. Turn the ignition key OFF, then reperform the sensor alignment procedure.

Inspection

Inspection procedures for A smart cruise control system failure

1.	Check the bumper appearance and accidents. (Visual appearance of the vehicle, Maintenance and bumper replacement history) > If the vehicle has been crashed, SCC mounting part is highly likely to be twisted.

2.	Check whether the radar sensor cover of the bumper is dirty. > If the cover is dirty, SCC is highly likely to be released by the foreign substance during operation.

3.	After engine starting, check SCC warning massage in the cluster and DTC code. (Refer to DTC guide)

Smart Cruise Control Switch Components and Components Location

Components

1. SET - switch 2. RES + switch 3. SCC switch

4. CANCEL switch 5. CRUISE switch

Smart Cruise Control Switch Schematic Diagrams

Circuit Diagram

Smart Cruise Control Switch Repair procedures

Inspection

[Measuring Resistance]

1.	Disconnect the cruise control switch connector from the control switch.

2.	Measure resistance between terminals on the control switch when each function switch is ON (switch is depressed). Function switch Terminal Resistance SET - 2 - 5 550?±5% RES + 2 - 5 880?±5% CANCEL 2 - 5 330?±5% CRUISE 2 - 5 1.4k?±5% SCC 2 - 5 5.54k?±5%

3.	If not within specification, replace switch.

Removal

1.	Disconnect the negative (-) battery terminal.

2.	Remove the steering wheel assembly. (Refer to Steering System - "Steering Wheel")

3.	Remove the steering back cover (A).

4.	Remove the steering remote control connector (A).

5.	Remove the steering remote control after loosening the screws.

Installation

1.	Install in the reverse order of removal.