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Home >> Ford >> 2021 >> Mustang Mach 1, Automatic Trans >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrumentation, Message Center And Warning Chimes (2 Of 2) >> Diagnosis And Testing >> Instrumentation, Message Center and Warning Chimes >> Pinpoint Tests >> Pinpoint Test AZ: The Steering Mode RTT (RECONFIGURABLE Telltale) RTT (RECONFIGURABLE Telltale) Is Never On

Pinpoint Test AZ: The Steering Mode RTT (RECONFIGURABLE Telltale) RTT (RECONFIGURABLE Telltale) Is Never On

  1. Normal Operation and Fault Conditions 

    See Steering Mode RTT. REFER to: Message Center - System Operation and Component Description .

    If the steering effort status message is missing or deemed invalid by the IPC for less than 5 seconds, the IPC defaults the steering mode RTT to the last indication state (on or off), based upon the last message received.

    If the steering effort status message is missing or if the data is deemed invalid by the IPC for 5 seconds or longer, the IPC defaults the steering mode RTT off.

    Possible Sources 

    • Communication concern
    • EPAS concern
    • GWM concern
    • IPC

  2. AZ1 CHECK THE MESSAGE CENTER OPERATION

    • Ignition ON.

    • Close all doors, the hood and luggage compartment lid.

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

    • Monitor the door ajar RTT.

    • Open the driver door.

    • Clear the message center popup warning.

    • Monitor the door ajar RTT.

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

    Yes  GO to  AZ2
    No  INSTALL a new IPC. Refer to Instrument Panel Cluster (IPC) .

  3. AZ2 VERIFY THE STEERING MODE SYSTEM OPERATES CORRECTLY

    • NOTE: Refer to the Owner's Literature for additional information on selecting the different steering modes.

      Verify the steering effort changes modes.

    Does the steering effort change when selecting different modes? 

    Yes  GO to  AZ3
    No  DIAGNOSE the EPAS steering effort mode selection. REFER to: Power Steering

  4. AZ3 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 DTC Chart: Instrument Panel Cluster (IPC) .
    No  GO to  AZ4

  5. AZ4 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)

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

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to: Communications Network
    No  DIAGNOSE the EPAS. REFER to: Power Steering
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