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Home >> Ford >> 2018 >> Transit Connect XL, Van Cargo >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission, Transfer Case And Power Transfer Unit (2 Of 2) >> Diagnosis And Testing >> Automatic Transmission, Transfer Case and Power Transfer Unit - 2.5L Duratec (125kW/170PS) >> Pinpoint Tests >> Pinpoint Test I : DTCS P0748, P0960, P0961, P0962, P0963

Pinpoint Test I : DTCS P0748, P0960, P0961, P0962, P0963

  1. Refer to Transmission Controls - 6F35 for schematic and connector information.

    Normal Operation and Fault Conditions 

    The PCM controls the hydraulic line pressure by varying the amount of current applied to the LPC solenoid. When no current is applied to the LPC Solenoid, the LPC Solenoid is fully opened, resulting in the maximum amount of hydraulic pressure to the main pressure regulator valve. When maximum current is applied, the LPC Solenoid is fully closed, resulting in minimum pressure to the main pressure regulator valve.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    PCM P0748:00 Pressure Control Solenoid "A" Electrical: No Sub Type Information LPC solenoid electrical circuit general fault. May set along with DTC P0960, P0962 and P0963.
    PCM P0960:00 Pressure Control Solenoid "A" Control Circuit/Open: No Sub Type Information Open circuit in solenoid or solenoid circuitry.
    PCM P0961:00 Pressure Control Solenoid "A" Control Circuit Range/Performance: No Sub Type Information Intermittent short to ground in solenoid or solenoid circuitry.
    PCM P0962:00 Pressure Control Solenoid "A" Control Circuit Low: No Sub Type Information Short to ground in solenoid or solenoid circuitry.
    PCM P0963:00 Pressure Control Solenoid "A" Control Circuit High: No Sub Type Information Short to power in solenoid circuitry.

    Possible Sources 

    • Connectors damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals
    • LPC Solenoid
    • Transmission internal wiring harness frame
    • PCM

  2. I1 RETRIEVE AND RECORD ALL DTCS

    • Using the diagnostic scan tool, retrieve all diagnostic trouble codes (DTCs).

    Are diagnostic trouble codes (DTCs) P0748, P0960, P0961, P0962 and/or P0963 present? 

    Yes  For diagnostic trouble codes (DTCs) P0748 and P0960, GO to  I2 For diagnostic trouble codes (DTCs) P0748, P0961 and P0962, GO to  I5 For diagnostic trouble codes (DTCs) P0748 and P0963, GO to  I7
    No  REFER to: Diagnosis By Symptom .

  3. I2 CHECK THE LINE PRESSURE CONTROL (LPC) SOLENOID CONTROL CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Disconnect Transmission Vehicle Harness C168A.

    • Disconnect PCM C175E.

    • Inspect the connectors for damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C168A-3
      GFD304648Courtesy of FORD MOTOR COMPANY
      		 C175E-78

    Is the resistance less than 3 ohms? 

    Yes  GO to  I3
    No  REPAIR the circuit.

  4. I3 CHECK THE LINE PRESSURE CONTROL (LPC) SOLENOID FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      Component side resistance pin 5.
      GFD304648Courtesy of FORD MOTOR COMPANY
      		 Component side resistance pin 3.

    Is the resistance between 4.0 and 7.2 ohms? 

    Yes  INSTALL a new PCM. REFER to: Powertrain Control Module (PCM) . CARRY OUT the Transmission Strategy Download, REFER to: Transmission Strategy Download .
    No  GO to  I4

  5. I4 CHECK THE LINE PRESSURE CONTROL (LPC) SOLENOID RESISTANCE

    • Remove the transmission internal wiring harness frame. REFER to: Transmission Internal Wiring Harness Frame . Inspect for metal shavings on the exposed metal contacts or other components and clean the solenoid and transmission internal wiring harness frame terminals.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      LPC Solenoid pin A.
      GFD304648Courtesy of FORD MOTOR COMPANY
      		 LPC Solenoid pin B.

    Is the resistance between 4.0 and 7.2 ohms? 

    Yes  INSTALL a new transmission internal wiring harness frame. REFER to: Transmission Internal Wiring Harness Frame .
    No  INSTALL a new LPC Solenoid A. REFER to: Solenoid .

  6. I5 CHECK THE LINE PRESSURE CONTROL (LPC) SOLENOID CONTROL CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.

    • Disconnect Transmission Vehicle Harness C168A.

    • Disconnect PCM C175E.

    • Inspect the connectors for damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C168A-3
      GFD304648Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  I6
    No  REPAIR the circuit.

  7. I6 CHECK THE LINE PRESSURE CONTROL (LPC) SOLENOID FOR A SHORT TO GROUND

    • Remove the transmission internal wiring harness frame. REFER to: Transmission Internal Wiring Harness Frame . Inspect for metal shavings on the exposed metal contacts or other components and clean the solenoid and transmission internal wiring harness frame terminals.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      LPC Solenoid pin A.
      GFD304648Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 3 ohms? 

    Yes  INSTALL a new LPC. REFER to: Solenoid .
    No  INSTALL a new transmission internal wiring harness frame. REFER to: Transmission Internal Wiring Harness Frame .

  8. I7 CHECK THE LINE PRESSURE CONTROL (LPC) SOLENOID FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect Transmission Vehicle Harness C168A.

    • Disconnect PCM C175E.

    • Inspect the connectors for damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C168A-3
      GFD304649Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  Refer to PCM Guided Routine Testing .
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