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Pinpoint Test Av: The Low Oil Pressure RTT (RECONFIGURABLE Telltale) Is Never Or Always On (2.3L [Performance], 5.0L [Performance] And 5.2L Engines)

  1. Normal Operation and Fault Conditions 

    See Low Engine Oil Pressure RTT. REFER to: Message Center - System Operation and Component Description .

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

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

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    PCM P0521:00 Engine Oil Pressure Sensor/Switch "A" Circuit Range/Performance: No Sub Type Information Sets in the PCM when the PCM detects signal variation outside of the module parameters on the hardwired input from the engine oil pressure sensor.
    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.
    PCM P0524:00 Engine Oil Pressure Too Low: No Sub Type Information Sets in the PCM when the PCM detects low engine oil pressure.

    Possible Sources 

    • Wiring, terminals or connectors
    • Tachometer concern
    • Engine oil pressure sensor
    • Base engine concern
    • PCM concern
    • IPC

  2. AV1 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  AV2
    No  GO to Pinpoint Test AO 

  3. AV2 CHECK THE TACHOMETER OPERATION

    • Start the engine.

    • Verify the tachometer operates.

    Does the tachometer operate? 

    Yes  GO to  AV3
    No  GO to Pinpoint Test H 

  4. AV3 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  AV4

  5. AV4 CHECK THE ENGINE OIL PRESSURE

    • Test the engine for low engine oil pressure.

    Was a low engine oil pressure concern detected? 

    Yes  REPAIR the low engine oil pressure concern. REFER to: Engine
    No  GO to  AV5

  6. AV5 CHECK FOR VOLTAGE AT THE ENGINE OIL PRESSURE SENSOR

    • Ignition OFF.

    • Disconnect Engine Oil Pressure Sensor C1657 (2.3L and 5.0L Engine).

    • Disconnect Engine Oil Pressure Sensor C1652 (5.2L Engine).

    • Ignition ON.

    • Measure:

      2.3L and 5.0L Engines 

      Positive Lead Measurement / Action Negative Lead
      C1657-3
      GFD604412Courtesy of FORD MOTOR COMPANY
      		 C1657-2

      5.2L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1652-3
      GFD604412Courtesy of FORD MOTOR COMPANY
      		 C1652-2

    Is the voltage approximately 5 volts? 

    Yes  GO to  AV6
    No  GO to  AV9

  7. AV6 CHECK THE ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect PCM C1551E (2.3L Engine).

    • Disconnect PCM C175E (5.0L and 5.2L Engines).

    • Ignition ON.

    • Measure:

      2.3L and 5.0L Engines 

      Positive Lead Measurement / Action Negative Lead
      C1657-1
      GFD604412Courtesy of FORD MOTOR COMPANY
      		 Ground

      5.2L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1652-1
      GFD604412Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  AV7

  8. AV7 CHECK THE ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Measure:

      2.3L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1657-1
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 C1551E-21

      5.0L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1657-1
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 C175E-69

      5.2L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1652-1
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 C175E-57

    Is the resistance less than 3 ohms? 

    Yes  GO to  AV8
    No  REPAIR the circuit.

  9. AV8 CHECK THE ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

    • Measure:

      2.3L and 5.0L Engines 

      Positive Lead Measurement / Action Negative Lead
      C1657-1
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 Ground

      5.2L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1652-1
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  AV13
    No  REPAIR the circuit.

  10. AV9 CHECK THE ENGINE OIL PRESSURE SENSOR VREF CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect PCM C1551E (2.3L Engine).

    • Disconnect PCM C175E (5.0L and 5.2L Engines).

    • Ignition ON.

    • Measure:

      2.3L and 5.0L Engines 

      Positive Lead Measurement / Action Negative Lead
      C1657-3
      GFD604412Courtesy of FORD MOTOR COMPANY
      		 Ground

      5.2L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1652-3
      GFD604412Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  AV10

  11. AV10 CHECK THE ENGINE OIL PRESSURE SENSOR VREF CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Measure:

      2.3L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1657-3
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 C1551E-25

      5.0L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1657-3
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 C175E-118

      5.2L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1652-3
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 C175E-34

    Is the resistance less than 3 ohms? 

    Yes  GO to  AV11
    No  REPAIR the circuit.

  12. AV11 CHECK THE ENGINE OIL PRESSURE SENSOR VREF CIRCUIT FOR A SHORT TO GROUND

    • Measure:

      2.3L and 5.0L Engines 

      Positive Lead Measurement / Action Negative Lead
      C1657-3
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 Ground

      5.2L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1652-3
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  AV12
    No  REPAIR the circuit.

  13. AV12 CHECK THE ENGINE OIL PRESSURE SENSOR RETURN CIRCUIT FOR AN OPEN

    • Measure:

      2.3L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1657-2
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 C1551E-41

      5.0L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1657-2
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 C175E-5

      5.2L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1652-2
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 C175E-49

    Is the resistance less than 3 ohms? 

    Yes  INSTALL a new engine oil pressure sensor. REFER to: the appropriate Serviec Information. CLEAR the Diagnostic Trouble Codes (DTCs). TEST the system for normal operation. If the oil pressure Reconfigurable Telltale is still never or always on, GO to  AV13
    No  REPAIR the circuit.

  14. AV13 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION

    • Ignition OFF.

    • Disconnect and inspect all PCM connectors.

    • Repair:

      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary

    • Reconnect the PCM connectors. Make sure they seat and latch correctly.

    • Operate the system and determine if the concern is still present

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, Refer to PCM Guided Routine .
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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