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Pinpoint Test AK: The Lane Keeping System RTT (RECONFIGURABLE Telltale) Indicator Is Never Or Always On

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
  1. Normal Operation and Fault Conditions 

    See Lane Keeping System. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .

    If the lane keeping system status display message is missing for less than 5 seconds, the IPC defaults the lane keeping system RTT indicator to the last indication state (on or off), based upon the last message received.

    If the lane keeping system status display message is missing for 5 seconds or longer, the IPC defaults the lane keeping system RTT indicator off.

    Possible Sources 

    • Lane keeping system concern
    • Communication concern
    • IPMA concern
    • GWM
    • IPC

  2. AK1 CHECK THE MESSAGE CENTER OPERATION

    • Ignition ON.

    • Close all doors and the hood.

    • Clear all message center warnings by pressing the OK button for each warning present.

    • Monitor the door ajar RTT warning indicator.

    • Open the driver door.

    • Clear the message center popup warning.

    • Monitor the door ajar RTT warning indicator.

    Is the door ajar RTT warning indicator off with the door closed, and on with the door open? 

    Yes  GO to  AK2
    No  GO to Pinpoint Test A 

  3. AK2 CHECK THE LANE DEPARTURE SWITCH OPERATION

    • Press the lane departure switch to turn the system on then off again.

    Does the lane departure RTT indicator turn on then off again? 

    Yes  The system is operating correctly at this time. The system was turned off.
    No  GO to  AK3

  4. AK3 PERFORM THE IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST

    • Using a diagnostic scan tool, perform the IPC self-test.

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to the Diagnostic Trouble Code (DTC) Chart .
    No  GO to  AK4

  5. AK4 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Using a diagnostic scan tool, check the GWM Continuous Memory Diagnostic Trouble Codes (DTCs).

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to: Controller Area Network (CAN) Module Communications Network .
    No  DIAGNOSE the lane keeping system. REFER to: Lane Keeping System .
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