CONDITION IN WHICH LANE-KEEP ASSIST SYSTEM DOES NOT OPERATE INCREASES SIGNIFICANTLY [LANE-KEEP ASSIST SYSTEM]

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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].)

Item

CONDITION IN WHICH LANE-KEEP ASSIST SYSTEM DOES NOT OPERATE INCREASES SIGNIFICANTLY

Description

• Condition in which lane-keep assist system does not operate increases significantly, even though white lines can be verified visually.

Possible Causes

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 technical guide.

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

• Windshield malfunction

? Windshield dirty

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

? Sticker adhesion on the windshield

• Object placed on the upper part of the dashboard

• Headlight malfunction

• Non-designated part installed

? Non-designated suspension installed

? Non-designated tire installed

? Non-designated windshield installed

• Forward sensing camera (FSC) lens dirty

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

• Forward sensing camera (FSC) malfunction

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY DTCs • Using the M-MDS, display the DTCs related to the EPS control module, forward sensing camera (FSC) and front body control module (FBCM). (See DTC INSPECTION [ELECTRIC POWER STEERING (EPS)].) (See DTC INSPECTION [FORWARD SENSING CAMERA (FSC)].) (See DTC INSPECTION [FRONT BODY CONTROL MODULE (FBCM)].) • Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [ELECTRIC POWER STEERING (EPS)].) (See DTC TABLE [FORWARD SENSING CAMERA (FSC)].) (See DTC TABLE [FRONT BODY CONTROL MODULE (FBCM)].)
1		No	Go to the next step.
2	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.
2		No	Go to the next step.
3	INSPECT WINDSHIELD • Inspect the windshield visually and verify if any of the following conditions occur. ? Windshield is dirty ? 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 7.
3		No	Go to the next step.
4	VERIFY DASHBOARD • Are there any reflective objects installed on the upper part of the dashboard?	Yes	Verify the malfunctioning location, then go to step 7. (Forward sensing camera (FSC) may not function correctly due to reflecting light)
4		No	Go to the next step.
5	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.
5		No	Go to the next step.
6	PERFORM FORWARD SENSING CAMERA (FSC) AIMING • Perform the forward sensing camera (FSC) aiming. (See FORWARD SENSING CAMERA (FSC) AIMING.)	—	Go to the next step.
7	VERIFY MALFUNCTION SYMPTOM • Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting.(Explain repair contents to customer).
7		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.)