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Pinpoint Test AF: The Low Engine Oil Pressure Warning RTT (RECONFIGURABLE Telltale) Indicator Is Never Or Always On

  1. Refer to INSTRUMENT CLUSTER for schematic and connector information.

    Normal Operation and Fault Conditions 

    See Low Engine Oil Pressure Warning. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .

    If the engine rpm data or engine oil pressure warning indicator request message is missing less than 5 seconds, the IPC defaults the low engine oil pressure warning RTT indicator to the last state (on or off), based upon the last message received.

    If the engine rpm data or engine oil pressure warning indicator request message is missing for 5 seconds or longer, the IPC defaults the low engine oil pressure warning RTT indicator on.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    PCM P0522:00 Engine Oil Pressure Sensor/Switch "A" Circuit Low: No Sub Type Information Sets in the PCM when the PCM detects a short to ground on the hardwired input from the engine oil pressure sensor.
    PCM P0523:00 Engine Oil Pressure Sensor/Switch "A" Circuit High: No Sub Type Information Sets in the PCM when the PCM detects an open on the hardwired input from the engine oil pressure sensor.

    Possible Sources 

    • Wiring, terminals or connectors
    • Instantaneous invalid sensor signal
    • Low engine oil pressure
    • Engine oil pressure sensor
    • GWM
    • PCM
    • IPC

  2. AF1 CHECK THE ENGINE OIL PRESSURE SENSOR STATUS

    NOTE: Make sure the engine temperature is warm or hot when performing this step.

    • Ignition ON.

    • Using a diagnostic scan tool, view PCM Parameter Identifications (PIDs).

    • Access the PCM and monitor the EOP_URPID

    Is an engine oil pressure sensor circuit fault present? 

    Yes  GO to  AF7
    No  GO to  AF2

  3. AF2 PERFORM THE PCM (POWERTRAIN CONTROL MODULE) SELF-TEST

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

    • Check for recorded Diagnostic Trouble Codes (DTCs).

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  For DTC P0522 and P0523, GO to  AF7
    For DTC P0521 and P0524, REFER to the appropriate Electronic Engine Controls article .. For all other Diagnostic Trouble Codes (DTCs), REFER to the Diagnostic Trouble Code (DTC) Chart .
    No  GO to  AF3

  4. AF3 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 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  AF4
    No  GO to Pinpoint Test A 

  5. AF4 CHECK THE TACHOMETER OPERATION

    • Start the engine.

    • Verify the tachometer operates.

    Does the tachometer operate? 

    Yes  GO to  AF5
    No  GO to Pinpoint Test B 

  6. AF5 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  AF6

  7. AF6 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)

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

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to: Controller Area Network (CAN) Module Communications Network .
    No  GO to  AF7

  8. AF7 CHECK FOR VOLTAGE AT THE ENGINE OIL PRESSURE SENSOR

    • Ignition OFF.

    • Disconnect Engine Oil Pressure Sensor C1149 (2.3L Engine).

    • Disconnect Engine Oil Pressure Sensor C1642 (2.7L Engine).

    • Ignition ON.

    • Measure:

      2.3L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1149-3
      GFD623860Courtesy of FORD MOTOR COMPANY
      		 C1149-2

      2.7L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1642-3
      GFD623860Courtesy of FORD MOTOR COMPANY
      		 C1642-2

    Is the voltage approximately 5 volts? 

    Yes  GO to  AF8
    No  GO to  AF11

  9. AF8 CHECK THE ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect PCM C175E (2.3L Engine).

    • Disconnect PCM C1551E (2.7L Engine).

    • Ignition ON.

    • Measure:

      2.3L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1149-1
      GFD623860Courtesy of FORD MOTOR COMPANY
      		 Ground

      2.7L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1642-1
      GFD623860Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  AF9

  10. AF9 CHECK THE ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Measure:

      2.3L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1149-1
      GFD623861Courtesy of FORD MOTOR COMPANY
      		 C175E-56

      2.7L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1642-1
      GFD623861Courtesy of FORD MOTOR COMPANY
      		 C1551E-29

    Is the resistance less than 3 ohms? 

    Yes  GO to  AF10
    No  REPAIR the circuit.

  11. AF10 CHECK THE ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

    • Measure:

      2.3L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1149-1
      GFD623861Courtesy of FORD MOTOR COMPANY
      		 Ground

      2.7L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1642-1
      GFD623861Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  INSTALL a new engine oil pressure sensor.. For 2.3L, REFER to: Engine Oil Pressure (EOP) Sensor - 2.3L EcoBoost (199kW/270PS). . For 2.7L, REFER to: Engine Oil Pressure (EOP) Sensor - 2.7L EcoBoost (238kW/324PS) . CLEAR the Diagnostic Trouble Codes (DTCs). TEST the system for normal operation. If the engine oil pressure RTT indicator is still always on, REFER to the appropriate Electronic Engine Controls service information .
    No  REPAIR the circuit.

  12. AF11 CHECK THE ENGINE OIL PRESSURE SENSOR VREF CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect PCM C175E (2.3L Engine).

    • Disconnect PCM C1551E (2.7L Engine).

    • Ignition ON.

    • Measure:

      2.3L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1149-3
      GFD623860Courtesy of FORD MOTOR COMPANY
      		 Ground

      2.7L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1642-3
      GFD623860Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  AF12

  13. AF12 CHECK THE ENGINE OIL PRESSURE SENSOR VREF CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Measure:

      2.3L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1149-3
      GFD623861Courtesy of FORD MOTOR COMPANY
      		 C175E-112

      2.7L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1642-3
      GFD623861Courtesy of FORD MOTOR COMPANY
      		 C1551E-117

    Is the resistance less than 3 ohms? 

    Yes  GO to  AF13
    No  REPAIR the circuit.

  14. AF13 CHECK THE ENGINE OIL PRESSURE SENSOR VREF CIRCUIT FOR A SHORT TO GROUND

    • Measure:

      2.3L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1149-3
      GFD623861Courtesy of FORD MOTOR COMPANY
      		 Ground

      2.7L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1642-3
      GFD623861Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  AF14
    No  REPAIR the circuit.

  15. AF14 CHECK THE ENGINE OIL PRESSURE SENSOR RETURN CIRCUIT FOR AN OPEN

    • Measure:

      2.3L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1149-2
      GFD623861Courtesy of FORD MOTOR COMPANY
      		 C175E-119

      2.7L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1642-2
      GFD623861Courtesy of FORD MOTOR COMPANY
      		 C1551E-112

    Is the resistance less than 3 ohms? 

    Yes  INSTALL a new engine oil pressure sensor.. For 2.3L, REFER to: Engine Oil Pressure (EOP) Sensor . . For 2.7L, REFER to: Engine Oil Pressure (EOP) Sensor . CLEAR the Diagnostic Trouble Codes (DTCs). TEST the system for normal operation. If the low engine oil pressure RTT indicator is still always on, REFER to the appropriate Electronic Engine Controls service information .
    No  REPAIR the circuit.
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