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Home >> Ford >> 2021 >> Explorer Limited, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Lane Keeping System >> Diagnosis And Testing >> Lane Keeping System >> Symptom Chart

Symptom Chart

Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .

Condition Possible Sources Action
A module does not communicate with the diagnostic scan tool Fuse
Wiring, terminals or connectors
Module
GO to Pinpoint Test AY 
The lane keeping aid or lane keeping alert does not turn on or activate REFER to the Pinpoint Test GO to Pinpoint Test A 
The lane keeping aid or lane keeping alert does not provide driver feedback once activated REFER to the Pinpoint Test GO to Pinpoint Test B 
The display lines in the IPC do not turn green after the Lane Keeping System (LKS) is turned on Road conditions GO to Pinpoint Test AZ 
The lane keeping aid or lane keeping alert provides early feedback on one side of the lane and late feedback on the other side of the lane Dirty or cracked windshield
Loose or incorrectly installed IPMA
Camera alignment
GO to Pinpoint Test BA 
Degraded performance from the lane keeping aid or lane keeping alert system Dirty or cracked windshield
Camera alignment
GO to Pinpoint Test BB 
LANE KEEPING SYSTEM MALFUNCTION - SERVICE REQUIRED message in the IPC PSCM concern GO to Pinpoint Test BC 
FRONT CAMERA TEMPORARILY NOT AVAILABLE message in the IPC Temporary over temperature condition GO to Pinpoint Test BD 
FRONT CAMERA LOW VISIBILITY - CLEAN SCREEN message in the IPC Dirty or cracked windshield
Dirt or debris in between the camera and the windshield
Camera windshield defrost heater
GO to Pinpoint Test BE 
FRONT CAMERA MALFUNCTION - SERVICE REQUIRED message in the IPC REFER to the Pinpoint Test GO to Pinpoint Test D 
The lane keeping aid and lane keeping alert will not turn off MyKey® in use GO to Pinpoint Test BF