LANE-KEEP ASSIST SYSTEM OPERATES [LANE-KEEP ASSIST SYSTEM (E)]

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Note

• Due to environmental effects, the system behavior may differ from the driver’s intentions even though the vehicle has no malfunction. To perform symptom troubleshooting, an understanding of the applicable system from the new vehicle instruction is required. For details on the control conditions of the system, refer to the [LANE-KEEP ASSIST SYSTEM] operation in the service highlights/technical guide.

Outline

Description

•  Lane-keep assist system operates unintentionally.

Possible cause

•  Cruising & traffic support (CTS) is on

•  BCM malfunction

Diagnostic Procedure

Step

Inspection

Results

Action

1

VERIFY ALL SYSTEM DTCs

•  Perform the DTC inspection.
(See DTC INSPECTION.)

•  Are any DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

Go to the next step.

2

VERIFY IF CRUISING & TRAFFIC SUPPORT (CTS) IS ON

•  Is the cruising & traffic support (CTS) stand-by indicator light turned on?

Yes

Complete the symptom troubleshooting. (Explain to the customer that when cruising & traffic support (CTS) is turned on, multiple systems turn on in conjunction with it.)

No

Go to the next step.

Repair completion verification

VERIFY THAT VEHICLE IS REPAIRED

•  Install/connect the part removed/disconnected during the troubleshooting procedure.

•  Has the malfunction symptom been eliminated?

Yes

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

No

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

If the CAN communication is normal, perform the diagnosis from Step 1.

•  If the malfunction is not resolved, replace the BCM.
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)

Description	• Lane-keep assist system operates unintentionally.
Possible cause	• Cruising & traffic support (CTS) is on • BCM malfunction

Step	Inspection	Results	Action
1	VERIFY ALL SYSTEM DTCs • Perform the DTC inspection. (See DTC INSPECTION.) • Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
1		No	Go to the next step.
2	VERIFY IF CRUISING & TRAFFIC SUPPORT (CTS) IS ON • Is the cruising & traffic support (CTS) stand-by indicator light turned on?	Yes	Complete the symptom troubleshooting. (Explain to the customer that when cruising & traffic support (CTS) is turned on, multiple systems turn on in conjunction with it.)
2		No	Go to the next step.
Repair completion verification	VERIFY THAT VEHICLE IS REPAIRED • Install/connect the part removed/disconnected during the troubleshooting procedure. • Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting. (Explain contents of repair to customer)
Repair completion verification		No	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. • If the malfunction is not resolved, replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)