LANE-KEEP ASSIST SYSTEM DOES NOT OPERATE [LANE-KEEP ASSIST SYSTEM]

id1503b4000400

Note

• If there is any vehicle malfunction complaint lodged by a customer, first perform malfunction diagnosis according to the troubleshooting procedure. (See FOREWORD [LANE-KEEP ASSIST SYSTEM].)

Possible malfunction

Note

• The detection performance of the forward sensing camera (FSC) has limitations and the lane-keep assist system may not operate normally. For the detection performance limitations, refer to the [FORWARD SENSING CAMERA (FSC)] in the service highlight.

• The forward sensing camera (FSC) operation record can be verified using the M-MDS.

• Vehicle speed

• Vehicle speed is low

• Steering wheel operation assist is off using personalization feature

• Lane-keep assist system OFF switch is on

• DSC OFF switch is on

• Lane-keep assist system OFF switch malfunction

• DSC OFF switch malfunction

• Brake switch malfunction

• Instrument cluster malfunction

• Connectivity master unit (CMU) malfunction

• DSC malfunction

• EPS CM malfunction

• Headlight malfunction

• Soiling or optical axis deviation of headlights

• Non-designated part installed

― Non-designated suspension installed

― Non-designated tire installed

― Non-designated windshield installed

Around forward sensing camera (FSC)

• Windshield malfunction

― Windshield fogged or dirty

― Occurrence of condensation (water droplets) on windshield or camera

― Foreign matter caught between the windshield and the forward sensing camera (FSC)

― Sticker adhesion on the windshield

• Temperature in forward sensing camera (FSC) is extremely high or low

• Something on windshield around forward sensing camera (FSC) is obstructing

• Forward sensing camera (FSC) lens dirty

• Forward sensing camera (FSC) optical axis adjustment not performed correctly

• Forward sensing camera (FSC) malfunction

Road conditions

• Lane is extremely wide or narrow

• Unclear or no traffic lane lines (solid line, dotted line)

• Detection not possible due to sharp curve or darkened traffic lane lines

• Road surface is reflected while driving towards sun or after rain

• Safe distance between vehicles cannot be kept due to heavy traffic

• Vehicle is driven through intersection, junction, or on forked road

• Surrounding brightness suddenly changes such as when entering or exiting tunnel

Diagnostic Procedure

Step

Inspection

Action

1

VERIFY DTCs

•  Using the M-MDS, display the DTCs related to the DSC HU/CM, EPS control module, instrument cluster, connectivity master unit (CMU) and forward sensing camera (FSC).
(See DTC INSPECTION [DYNAMIC STABILITY CONTROL (DSC)].)

(See DTC INSPECTION [ELECTRIC POWER STEERING (EPS)].)

(See DTC INSPECTION [CONNECTIVITY MASTER UNIT].)

(See DTC INSPECTION [INSTRUMENT CLUSTER].)

(See DTC INSPECTION [FORWARD SENSING CAMERA (FSC)].)

•  Are any DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)].)

(See DTC TABLE [ELECTRIC POWER STEERING (EPS)].)

(See DTC TABLE [CONNECTIVITY MASTER UNIT].)

(See DTC TABLE [INSTRUMENT CLUSTER].)

(See DTC TABLE [FORWARD SENSING CAMERA (FSC)].)

No

Go to the next step.

2

VERIFY INSTRUMENT CLUSTER DISPLAY

•  Is the DSC OFF indicator light turned on?

Yes

The vehicle is normal. (Explain to the customer that the lane-keep assist system does not operate when the DSC operation is cancelled.)

Complete the symptom troubleshooting.

No

Go to the next step.

3

INSPECT PHENOMENON DUE TO DETECTION PERFORMANCE LIMITATIONS

•  Refer to the new vehicle instruction and inspect the detection performance of the forward sensing camera (FSC).

•  Inspect the forward sensing camera (FSC) operation record using the M-MDS.

•  Are the applicable items for the detection performance displayed?

Yes

The vehicle is normal. (Explain to the customer that the lane-keep assist system may not operate due to the detection performance limitations of the forward sensing camera (FSC).)

Complete the symptom troubleshooting.

No

Go to the next step.

4

VERIFY DRIVING CONDITION

•  Ask the customer if the condition was any of the following conditions when the malfunction occurred.

―  Driving at low vehicle speed

―  Steering wheel operation assist was turned off using personalization feature

―  Lane-keep assist system OFF switch was on

―  DSC OFF switch was on

―  Vehicle was driven on extremely narrow or wide road

―  Vehicle is driven on road with unclear or no traffic lane lines (solid line, dotted line)

―  Vehicle is driven on road where detection is not possible due to sharp curve or darkened traffic lane lines.

―  Vehicle is driven on road where road surface is reflected while driving towards sun or after rain.

―  Vehicle is driven on road where safe distance between vehicles cannot be kept due to heavy traffic.

―  Vehicle is driven through intersection, junction, or on forked road

―  Surrounding brightness suddenly changes such as when entering or exiting tunnel

•  Is any of the above driving conditions met?

Yes

The vehicle is normal.

Complete the symptom troubleshooting.

No

Go to the next step.

5

INSPECT WINDSHIELD

•  Inspect the windshield visually and verify if any of the following conditions occur.

―  Windshield fogged or dirty

―  Occurrence of condensation (water droplets) on windshield or camera

―  Foreign matter caught between the windshield and the forward sensing camera (FSC)

―  Sticker adhesion on the windshield

•  Do any of the previous conditions occur?

Yes

Repair the malfunctioning location, then go to step 14.

No

Go to the next step.

6

VERIFY DASHBOARD

•  Are there any reflective objects installed on the upper part of the dashboard?

Yes

Verify the malfunctioning location, then go to step 14.

(Forward sensing camera (FSC) may not function correctly due to reflecting light)

No

Go to the next step.

7

VERIFY FORWARD SENSING CAMERA (FSC) LENS DIRT

•  Verify if the forward sensing camera (FSC) lens is dirty.

•  Is the forward sensing camera (FSC) lens dirty?

Yes

Clean the forward sensing camera (FSC) lens, then go to the next step.

No

Go to the next step.

8

VERIFY HEADLIGHTS

•  Verify the headlights and inspect the windshield visually and verify if any of the following conditions occur.

―  Headlights are dirty

―  Headlight optical axis deviation

•  Do any of the previous conditions occur?

Yes

Repair the malfunctioning location, then go to step 14.

No

Go to the next step.

9

VERIFY INSTALLED NON-DESIGNATED PART

•  Verify that a non-designated part has been installed.

•  Is there a non-designated part installed on the suspension, tire or windshield?

Yes

Explain to the customer that the lane-keep assist system does not operate because a non-designated part has been installed.

No

Go to the next step.

10

INSPECT BRAKE SWITCH

•  Inspect the brake switch.
(See BRAKE SWITCH INSPECTION.)

•  Is the brake switch normal?

Yes

Go to the next step.

No

Replace the brake switch, then go to the Step 14.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

11

INSPECT CLUSTER SWITCH

•  Inspect the Lane-keep assist system OFF switch, DSC OFF switch.
(See LANE-KEEP ASSIST SYSTEM OFF SWITCH INSPECTION.)

(See DSC OFF SWITCH INSPECTION.)

•  Is the Lane-keep assist system OFF switch, DSC OFF switch normal?

Yes

Go to the next step.

No

Replace the brake switch, then go to the Step 14.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

12

INSPECT INSTRUMENT CLUSTER

•  Inspect the instrument cluster.
(See INSTRUMENT CLUSTER INSPECTION.)

•  Is the instrument cluster normal?

Yes

Go to the next step.

No

Replace the instrument cluster, then go to the Step 14.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

13

PERFORM FORWARD SENSING CAMERA (FSC) AIMING

•  Perform the forward sensing camera (FSC) aiming.
(See FORWARD SENSING CAMERA (FSC) AIMING.)

—

Go to the next step.

14

VERIFY MALFUNCTION SYMPTOM

•  Has the malfunction symptom been eliminated?

Yes

Complete the symptom troubleshooting.(Explain repair contents to customer).

No

Repeat the diagnosis from Step 1.

If the malfunction has not been resolved, replace the forward sensing camera (FSC).

(See FORWARD SENSING CAMERA (FSC) REMOVAL/INSTALLATION.)

Step	Inspection		Action
1	VERIFY DTCs • Using the M-MDS, display the DTCs related to the DSC HU/CM, EPS control module, instrument cluster, connectivity master unit (CMU) and forward sensing camera (FSC). (See DTC INSPECTION [DYNAMIC STABILITY CONTROL (DSC)].) (See DTC INSPECTION [ELECTRIC POWER STEERING (EPS)].) (See DTC INSPECTION [CONNECTIVITY MASTER UNIT].) (See DTC INSPECTION [INSTRUMENT CLUSTER].) (See DTC INSPECTION [FORWARD SENSING CAMERA (FSC)].) • Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)].) (See DTC TABLE [ELECTRIC POWER STEERING (EPS)].) (See DTC TABLE [CONNECTIVITY MASTER UNIT].) (See DTC TABLE [INSTRUMENT CLUSTER].) (See DTC TABLE [FORWARD SENSING CAMERA (FSC)].)
1		No	Go to the next step.
2	VERIFY INSTRUMENT CLUSTER DISPLAY • Is the DSC OFF indicator light turned on?	Yes	The vehicle is normal. (Explain to the customer that the lane-keep assist system does not operate when the DSC operation is cancelled.) Complete the symptom troubleshooting.
2		No	Go to the next step.
3	INSPECT PHENOMENON DUE TO DETECTION PERFORMANCE LIMITATIONS • Refer to the new vehicle instruction and inspect the detection performance of the forward sensing camera (FSC). • Inspect the forward sensing camera (FSC) operation record using the M-MDS. • Are the applicable items for the detection performance displayed?	Yes	The vehicle is normal. (Explain to the customer that the lane-keep assist system may not operate due to the detection performance limitations of the forward sensing camera (FSC).) Complete the symptom troubleshooting.
3		No	Go to the next step.
4	VERIFY DRIVING CONDITION • Ask the customer if the condition was any of the following conditions when the malfunction occurred. ― Driving at low vehicle speed ― Steering wheel operation assist was turned off using personalization feature ― Lane-keep assist system OFF switch was on ― DSC OFF switch was on ― Vehicle was driven on extremely narrow or wide road ― Vehicle is driven on road with unclear or no traffic lane lines (solid line, dotted line) ― Vehicle is driven on road where detection is not possible due to sharp curve or darkened traffic lane lines. ― Vehicle is driven on road where road surface is reflected while driving towards sun or after rain. ― Vehicle is driven on road where safe distance between vehicles cannot be kept due to heavy traffic. ― Vehicle is driven through intersection, junction, or on forked road ― Surrounding brightness suddenly changes such as when entering or exiting tunnel • Is any of the above driving conditions met?	Yes	The vehicle is normal. Complete the symptom troubleshooting.
4		No	Go to the next step.
5	INSPECT WINDSHIELD • Inspect the windshield visually and verify if any of the following conditions occur. ― Windshield fogged or dirty ― Occurrence of condensation (water droplets) on windshield or camera ― Foreign matter caught between the windshield and the forward sensing camera (FSC) ― Sticker adhesion on the windshield • Do any of the previous conditions occur?	Yes	Repair the malfunctioning location, then go to step 14.
5		No	Go to the next step.
6	VERIFY DASHBOARD • Are there any reflective objects installed on the upper part of the dashboard?	Yes	Verify the malfunctioning location, then go to step 14. (Forward sensing camera (FSC) may not function correctly due to reflecting light)
6		No	Go to the next step.
7	VERIFY FORWARD SENSING CAMERA (FSC) LENS DIRT • Verify if the forward sensing camera (FSC) lens is dirty. • Is the forward sensing camera (FSC) lens dirty?	Yes	Clean the forward sensing camera (FSC) lens, then go to the next step.
7		No	Go to the next step.
8	VERIFY HEADLIGHTS • Verify the headlights and inspect the windshield visually and verify if any of the following conditions occur. ― Headlights are dirty ― Headlight optical axis deviation • Do any of the previous conditions occur?	Yes	Repair the malfunctioning location, then go to step 14.
8		No	Go to the next step.
9	VERIFY INSTALLED NON-DESIGNATED PART • Verify that a non-designated part has been installed. • Is there a non-designated part installed on the suspension, tire or windshield?	Yes	Explain to the customer that the lane-keep assist system does not operate because a non-designated part has been installed.
9		No	Go to the next step.
10	INSPECT BRAKE SWITCH • Inspect the brake switch. (See BRAKE SWITCH INSPECTION.) • Is the brake switch normal?	Yes	Go to the next step.
10		No	Replace the brake switch, then go to the Step 14. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
11	INSPECT CLUSTER SWITCH • Inspect the Lane-keep assist system OFF switch, DSC OFF switch. (See LANE-KEEP ASSIST SYSTEM OFF SWITCH INSPECTION.) (See DSC OFF SWITCH INSPECTION.) • Is the Lane-keep assist system OFF switch, DSC OFF switch normal?	Yes	Go to the next step.
11		No	Replace the brake switch, then go to the Step 14. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
12	INSPECT INSTRUMENT CLUSTER • Inspect the instrument cluster. (See INSTRUMENT CLUSTER INSPECTION.) • Is the instrument cluster normal?	Yes	Go to the next step.
12		No	Replace the instrument cluster, then go to the Step 14. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
13	PERFORM FORWARD SENSING CAMERA (FSC) AIMING • Perform the forward sensing camera (FSC) aiming. (See FORWARD SENSING CAMERA (FSC) AIMING.)	—	Go to the next step.
14	VERIFY MALFUNCTION SYMPTOM • Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting.(Explain repair contents to customer).
14		No	Repeat the diagnosis from Step 1. If the malfunction has not been resolved, replace the forward sensing camera (FSC). (See FORWARD SENSING CAMERA (FSC) REMOVAL/INSTALLATION.)