Hyundai Elantra CN7: Cruise Control System (CC) - Advanced Driver Assistance System (ADAS) - Hyundai Elantra CN7 2021-2024 Workshop ManualHyundai Elantra CN7: Cruise Control System (CC)

Description and operation

Description
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.
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 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.
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.

Troubleshooting

Trouble Symptom Charts
Trouble Symptom 1

Trouble Symptom 2
Trouble symptom
Probable cause
Remedy
The set vehicle speed varies greatly upward or downward
"Surging" (repeated alternating acceleration and deceleration) occurs after setting
Malfunction of the vehicle speed sensor circuit
Repair the vehicle speed sensor system, or replace the part
Malfunction of ECM
Check input and output signals at ECM

Trouble Symptom 3
Trouble symptom
Probable cause
Remedy
The CC system is not canceled when the brake pedal is depressed
Damaged or disconnected wiring of the brake pedal switch
Repair the harness or replace the brake pedal switch
Malfunction of the ECM signals
Check input and output signals at ECM

Trouble Symptom 4
Trouble symptom
Probable cause
Remedy
The CC system is not canceled when the shift lever is moved to the "N" position (It is canceled, however, when the brake pedal is depressed)
Damaged or disconnected wiring of inhibitor switch input circuit
Repair the harness or repair or replace the inhibitor switch
Improper adjustment of inhibitor switch
Malfunction of the ECM signals
Check input and output signals at ECM

Trouble Symptom 5
Trouble symptom
Probable cause
Remedy
Cannot decelerate (coast) by using the "SET/–" switch
Temporary damaged or disconnected wiring of "SET/–" switch input circuit
Repair the harness or replace the "SET/–" switch
Malfunction of the ECM signals
Check input and output signals at ECM

Trouble Symptom 6
Trouble symptom
Probable cause
Remedy
Cannot accelerate or resume speed by using the "RES/+" switch
Damaged or disconnected wiring, or short circuit, or "RES/+" switch input circuit
Repair the harness or replace the "RES/+" switch
Malfunction of the ECM signals
Check input and output signals at ECM

Trouble Symptom 7
Trouble symptom
Probable cause
Remedy
CC system can be set while driving at a vehicle speed of less than 40km/h (25mph), or there is no automatic cancellation at that speed
Malfunction of the vehicle-speed sensor circuit
Repair the vehicle speed sensor system, or replace the part
Malfunction of the ECM signals
Check input and output signals at ECM

Trouble Symptom 8
Trouble symptom
Probable cause
Remedy
The cruise main switch indicator lamp does not illuminate (But CC system is normal)
Damaged or disconnected bulb of cruise main switch indicator lamp
Repair the harness or replace the part.
Harness damaged or disconnected

Components and components location

Components

1. Remote control switch (Audio swtich)
2. Remote control switch (Cruise control switch)


Schematic diagrams

Schematic Diagrams

Repair procedures

Inspection
1.
Check for resistance between terminals in each switch position (LH).

[LH : Audio + Hands free]
Switch
Resistance (±5%)
SEEK Up
430 Ω
SEEK Down
1.11 kΩ
MODE
2.11 kΩ
MUTE
3.11 kΩ
Volume (+)
4.61 kΩ
Volume (-)
6.81 kΩ
Voice
10.71 kΩ
SEND
18.91 kΩ
END
40.91 kΩ

2.
Check for resistance between terminals in each switch position (RH).

[Cruise]
Switch
Resistance (±3%)
Paddle shift (Up)
390 Ω
Cruise CANCEL
610 Ω
Cruise SET&Speed down
910 Ω
Cruise RES&Speed up
1.38 kΩ
Cruise ON/OFF
2.13 kΩ
Cruise speed limit ON/OFF
3.63 kΩ
SCC distance adjustment
7.63 kΩ

[Trip]
Switch
Resistance (±3%)
Paddle shift (Down)
390 Ω
Trip group/Trip
610 Ω
Trip (Up)
910 Ω
Trip (Down)
1.38 kΩ
OK
2.13 kΩ
BACK
3.63 kΩ
LFA
7.93 kΩ

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(Switch (A)) after loosening the screws.

Installation
1.
Install the steering wheel remote control after connecting the connector.
2.
Install the steering wheel.
3.
Connect the negative (-) battery terminal.
Front Radar System
General safety information and caution General Safety Information and Caution1.Be careful when driving the vehicle using the smart cruise control system as follows.(1)On curves or inclines/declines ...

Rear Corner Radar System
Description and operation DescriptionRear Corner Radar is a system that measures the relative speed and distance from the following vehicles by using two electromagnetic wave radar sensors attached ...