Pinpoint Test A : The Lane Keeping System Does Not Turn On Or Activate: Notes

WARNING: This page is about a different car, the 2018 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.

Normal Operation and Fault Conditions

REFER to: Lane Keeping System - System Operation and Component Description .

Possible Causes

Dirty, scratched or obstructed windshield and/or camera
IPMA overheating condition
Communication network concern
Lane keeping system switch (integral to the LH steering column multifunction switch)
IPMA concern
PSCM concern
SASM concern
BCM concern
PCM concern
RCM concern
IPC concern

Visual Inspection and Diagnostic Pre-Checks

Certain lane keeping system concerns can be caused by the IPMA being to cold or overheating due to heavy sunload. Prior to diagnosing a lane keeping system concern, allow the vehicle to warm up or remove the vehicle from direct sunlight. RECHECK after 10 minutes.