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Home >> Ford >> 2021 >> Bronco First Edition, 4D Utility >> Repair and Diagnosis >> Electrical >> Gauges >> Instrumentation, Message Center And Warning Chimes (2 Of 2) >> Diagnosis And Testing >> Instrumentation, Message Center and Warning Chimes >> Pinpoint Tests >> Pinpoint Test Y: The Four-Wheel Drive (2H, 4L, 4H Or 4A) RTT (RECONFIGURABLE Telltale) Indicator Is Never Or Always On (Electronic 4WD (Four-Wheel Drive))

Pinpoint Test Y: The Four-Wheel Drive (2H, 4L, 4H Or 4A) RTT (RECONFIGURABLE Telltale) Indicator Is Never Or Always On (Electronic 4WD (Four-Wheel Drive))

  1. Normal Operation and Fault Conditions 

    See Four-Wheel Drive RTT Indicators. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .

    If the 4x2 indicator request, 4x4 low indicator request, 4x4 high indicator request or 4x4 auto indicator request message is missing for less than 5 seconds, the IPC defaults the specific 4x4 RTT indicator to its last state (on or off) based upon the last message received.

    If the 4x2 indicator request, 4x4 low indicator request, 4x4 high indicator request or 4x4 auto indicator request message is missing for 5 seconds or longer, the IPC defaults the specific 4x4 RTT indicator off.

    Possible Sources 

    • Communication concern
    • Message center concern
    • AWD module concern
    • GWM concern
    • IPC

  2. Y1 CHECK THE MESSAGE CENTER OPERATION

    • Ignition ON.

    • Close all doors, tailgate and the hood.

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

    • Monitor the door ajar RTT indicator.

    • Open the driver door.

    • Clear the message center popup warning.

    • Monitor the door ajar RTT indicator.

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

    Yes  GO to  Y2
    No  GO to Pinpoint Test A 

  3. Y2 PERFORM THE IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST

    • Ignition ON.

    • 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  Y3

  4. Y3 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 four-wheel drive system.. For 4x4 with part time engagement, REFER to: Four-Wheel Drive Systems . . For advanced 4x4 with 4A mode, REFER to: Four-Wheel Drive Systems .
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