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Home >> Ford >> 2018 >> Transit-350 Base, Van Cargo Extended, 3.2L Eng VIN V >> Repair and Diagnosis >> Electrical >> Gauges >> Information Center - Instrumentation, Message Center And Warning Chimes (2 Of 2) >> Diagnosis And Testing >> Instrumentation, Message Center and Warning Chimes >> Pinpoint Tests >> Pinpoint Test X : The Low Oil Pressure Warning Indicator Is Never Or Always On

Pinpoint Test X : The Low Oil Pressure Warning Indicator Is Never Or Always On

  1. NOTE: If DTC U0100:00 sets in the IPC, other observable symptoms can be an inoperative speedometer, tachometer, temperature gauge or odometer.

    Refer to Instrument Cluster for schematic and connector information.

    Normal Operation and Fault Conditions 

    If the IPC fails to receive the oil pressure warning message from the BCM for less than 2 seconds, the IPC defaults the low oil pressure warning indicator to the last state (on or off), based upon the last known good oil pressure status message

    If the BCM fails to receive the oil pressure warning message from the PCM for 2 seconds or longer, the BCM and the IPC sets DTC U0100:00 and the IPC defaults the low oil pressure warning indicator on.

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

    Possible Sources 

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

    Visual Inspection and Pre-checks 

    • engine for noise that indicates a low engine oil pressure concern
    • engine oil pressure switch for signs of external damage.
    • engine oil pressure switch connector for signs of corrosion and inspect the harness for damage indicating a cut, open or circuit shorted to ground

  2. X1 CARRY OUT THE IPC (INSTRUMENT PANEL CLUSTER) INDICATOR LAMP CONTROL ACTIVE COMMAND USING A DIAGNOSTIC SCAN TOOL

    • Ignition ON.

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

    • Select the IPC low oil pressure warning indicator (OIL_P_LOW) PID.

    • Command low oil pressure warning indicator on then off while observing the low oil pressure warning indicator.

    Does the low oil pressure warning indicator illuminate when commanded on and turn off when commanded off? 

    Yes  GO to  X2
    No  Refer to IPC Guided Routine Testing .

  3. X2 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST

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

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to DTC Chart: IPC .
    No  If the low oil pressure warning indicator is never on, GO to  X3 If the low oil pressure warning indicator is always on, GO to  X6

  4. X3 CHECK FOR A STUCK CLOSED ENGINE OIL PRESSURE SWITCH

    • Ignition OFF.

    • Disconnect Engine Oil Pressure Switch C1642 (3.2L and 3.5L Engines).

    • Disconnect Engine Oil Pressure Switch C103 (3.7L Engine).

    • Ignition ON.

    • Observe the low oil pressure warning indicator.

    Does the low oil pressure warning indicator turn on? 

    Yes  INSTALL a new engine oil pressure switch. Refer to the appropriate Engine article for the procedure.
    No  GO to  X4

  5. X4 CHECK THE OIL PRESSURE INPUT CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.

    • Disconnect PCM C1232E (3.2L Engine).

    • Disconnect PCM C1551E (3.5L Engine).

    • Disconnect PCM C175E (3.7L Engine).

    • Measure:

      3.2L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1232E-5
      GFD311333Courtesy of FORD MOTOR COMPANY
      		 Ground

      3.5L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1551E-9
      GFD311333Courtesy of FORD MOTOR COMPANY
      		 Ground

      3.7L Engine 

      Positive Lead Measurement / Action Negative Lead
      C175E-48
      GFD311333Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  X5
    No  REPAIR the circuit.

  6. X5 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE PCM (POWERTRAIN CONTROL MODULE) KOEO (KEY ON, ENGINE OFF) SELF-TEST

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

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  Refer to the appropriate Engine article for the procedure.
    No  GO to  X9

  7. X6 CHECK FOR A STUCK OPEN ENGINE OIL PRESSURE SWITCH

    • Ignition OFF.

    • Disconnect Engine Oil Pressure Switch C1642 (3.2L and 3.5L).

    • Disconnect Engine Oil Pressure Switch C103 (3.7L).

    • Connect a fused jumper wire:

      3.7L Engine 

      Lead 1 Measurement / Action Lead 2
      C103-1
      GFD311133Courtesy of FORD MOTOR COMPANY
      		 Ground

      3.2L and 3.5L Engines 

      Lead 1 Measurement / Action Lead 2
      C1642-1
      GFD311133Courtesy of FORD MOTOR COMPANY
      		 Ground

    • Start the engine.

    • Observe the low oil pressure warning indicator.

    Does the low oil pressure indicator turn off? 

    Yes  REMOVE the fused jumper wire. GO to  X7
    No  LEAVE the fused jumper wire connected. GO to  X8

  8. X7 CHECK THE OIL PRESSURE

    • Test the engine for low oil pressure.

    Was a low oil pressure concern detected? 

    Yes  REPAIR the low oil pressure concern. Refer to the appropriate Engine article for the procedure.
    No  INSTALL a new engine oil pressure switch. Refer to the appropriate Engine article for the procedure.

  9. X8 CHECK THE ENGINE OIL PRESSURE INPUT CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Disconnect PCM C1232E (3.2L Engine).

    • Disconnect PCM C1551E (3.5L Engine).

    • Disconnect PCM C175E (3.7L Engine).

    • Measure:

      3.2L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1232E-5
      GFD311333Courtesy of FORD MOTOR COMPANY
      		 C1642-1

      3.5L Engine 

      Positive Lead Measurement / Action Negative Lead
      C1551E-9
      GFD311333Courtesy of FORD MOTOR COMPANY
      		 C1642-1

      3.7L Engine 

      Positive Lead Measurement / Action Negative Lead
      C175E-48
      GFD311333Courtesy of FORD MOTOR COMPANY
      		 C103-1

    Is the resistance less than 3 ohms? 

    Yes  REMOVE the fused jumper wire. GO to  X9
    No  REMOVE the fused jumper wire. REPAIR the circuit.

  10. X9 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, Refer to PCM Guided Routine Testing .
    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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