LANE-KEEP ASSIST SYSTEM DOES NOT OPERATE [LANE-KEEP ASSIST SYSTEM] - MAZDA CX-9 TC 2016

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].)

Item	LANE-KEEP ASSIST SYSTEM DOES NOT OPERATE
Description	—
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. • DSC OFF switch is on • Lane is extremely wide or narrow • LDWS switch malfunction • Instrument cluster malfunction • Connectivity master unit (CMU) malfunction • Forward sensing camera (FSC) malfunction • EPS CM malfunction • DSC HU/CM malfunction

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 [ELECTRIC POWER STEERING (EPS)].) (See DTC INSPECTION [CONNECTIVITY MASTER UNIT].) (See DTC INSPECTION [INSTRUMENT CLUSTER].) (See DTC INSPECTION [FORWARD SENSING CAMERA (FSC)].) (See DTC INSPECTION [DSC HU/CM].) • 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 [CONNECTIVITY MASTER UNIT].) (See DTC TABLE [INSTRUMENT CLUSTER].) (See DTC TABLE [FORWARD SENSING CAMERA (FSC)].) (See DTC TABLE [DSC HU/CM].)
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 LDWS SWITCH • Inspect the LDWS switch. (See LDWS SWITCH INSPECTION.) • Is the LDWS switch normal?	Yes	Go to the next step.
5		No	Replace the cluster switch, then go to step 6. (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.)