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Pinpoint Test AJ: The Lane Centering Aid RTT (RECONFIGURABLE Telltale) Indicator Is Never 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 

    Lane Centering Aid RTT Indicator. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .

    If the traffic jam assist status message is missing or deemed invalid by the IPC for less than 5 seconds, the IPC defaults the lane centering aid RTT indicator to the last indication state (on or off), based upon the last message received.

    If the traffic jam assist status message is missing or if the data is deemed invalid by the IPC for 5 seconds or longer, the IPC defaults the lane centering aid RTT indicator off.

    Possible Sources 

    • Communication concern
    • Adaptive cruise control concern
    • Lane centering aid concern (part of the adaptive cruise control system)
    • IPMA concern
    • GWM
    • IPC

  2. AJ1 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  AJ2
    No  GO to Pinpoint Test A 

  3. AJ2 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  AJ3

  4. AJ3 PERFORM THE IPMA (IMAGE PROCESSING MODULE A) SELF-TEST

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

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to the Master DTC Chart.
    No  GO to  AJ4

  5. AJ4 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 centering aid system. REFER to: Cruise Control .
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