LANE-KEEP ASSIST SYSTEM MALFUNCTIONS [LANE-KEEP ASSIST SYSTEM]

id1503b4000700

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

LANE-KEEP ASSIST SYSTEM MALFUNCTIONS

Description

• Lane-keep assist system operation differs from driver's intentions in driving situation.

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.

• Lane-keep assist system operates incorrectly due to effects of road conditions

? Partially erased white lines remain on road

? Lane is extremely wide or narrow

? Lane branches off such as at fork in road

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

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY DTCs • Using the M-MDS, display the DTCs related to the EPS control module and forward sensing camera (FSC). (See DTC INSPECTION [ELECTRIC POWER STEERING (EPS)].) (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 [ELECTRIC POWER STEERING (EPS)].) (See DTC TABLE [FORWARD SENSING CAMERA (FSC)].)
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	PERFORM FORWARD SENSING CAMERA (FSC) AIMING • Perform the forward sensing camera (FSC) aiming. (See FORWARD SENSING CAMERA (FSC) AIMING.)	—	Go to the next step.
4	VERIFY MALFUNCTION SYMPTOM • Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting.(Explain repair contents to customer).
4		No	Repeat the diagnosis from Step 1. If the malfunction is not resolved, explain to the customer that the lane- keep assist system operates incorrectly due to the effects of road conditions.