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 technical guide.

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

• DSC OFF switch is on

• Lane is extremely wide or narrow

• Lane-keep assist system off switch malfunction

• Instrument cluster malfunction

• Connectivity master unit (CMU) malfunction

• Forward sensing camera (FSC) malfunction

• EPS CM malfunction

Diagnostic Procedure

Step

Inspection

Action

1

VERIFY DTCs

•  Using the M-MDS, display the DTCs related to the EPS control module, instrument cluster, connectivity master unit (CMU) and forward sensing camera (FSC).
(See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS.)

(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 ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS.)

(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.

―  DSC OFF switch was on

―  Vehicle was driven on extremely narrow or wide road

•  Is any of the above driving conditions met?

Yes

The vehicle is normal. (Explain to the customer that the lane-keep assist system does not operate when the DSC operation is cancelled or the vehicle is driven on an extremely narrow or wide road.)

Complete the symptom troubleshooting.

No

Go to the next step.

5

INSPECT LANE-KEEP ASSIST SYSTEM OFF SWITCH

•  Inspect the lane-keep assist system off switch.
(See LANE-KEEP ASSIST SYSTEM OFF SWITCH INSPECTION.)

•  Is the lane-keep assist system switch normal?

Yes

Go to the next step.

No

Replace the cluster switch, then go to step 7.

(See CLUSTER SWITCH REMOVAL/INSTALLATION.)

6

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 7.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

7

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 EPS control module, instrument cluster, connectivity master unit (CMU) and forward sensing camera (FSC). (See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS.) (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 ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS.) (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. ― DSC OFF switch was on ― Vehicle was driven on extremely narrow or wide road • Is any of the above driving conditions met?	Yes	The vehicle is normal. (Explain to the customer that the lane-keep assist system does not operate when the DSC operation is cancelled or the vehicle is driven on an extremely narrow or wide road.) Complete the symptom troubleshooting.
4		No	Go to the next step.
5	INSPECT LANE-KEEP ASSIST SYSTEM OFF SWITCH • Inspect the lane-keep assist system off switch. (See LANE-KEEP ASSIST SYSTEM OFF SWITCH INSPECTION.) • Is the lane-keep assist system switch normal?	Yes	Go to the next step.
5		No	Replace the cluster switch, then go to step 7. (See CLUSTER SWITCH REMOVAL/INSTALLATION.)
6	INSPECT INSTRUMENT CLUSTER • Inspect the instrument cluster. (See INSTRUMENT CLUSTER INSPECTION.) • Is the instrument cluster normal?	Yes	Go to the next step.
6		No	Replace the instrument cluster, then go to the Step 7. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
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.)