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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 B : DTCS P0755, P0758, P0759, P0976, P0977

Pinpoint Test B : DTCS P0755, P0758, P0759, P0976, P0977

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

    Normal Operation and Fault Conditions 

    The PCM applies and releases the various clutches in the transmission by actuating the shift solenoids in the solenoid body. SSB is a Variable Force Solenoid (VFS).

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    PCM P0755:00 Shift Solenoid "B": No Sub Type Information Open circuit in the solenoid or wire harness.
    PCM P0758:00 Shift Solenoid "B" Electrical: No Sub Type Information Open circuit in the solenoid or wire harness.
    PCM P0759:00 Shift Solenoid "B" Intermittent: No Sub Type Information Intermittent circuit in the solenoid or wire harness open, shorted to ground or shorted to power.
    PCM P0976:00 Shift Solenoid "B" Control Circuit Low: No Sub Type Information Short to ground in the solenoid or wire harness.
    PCM P0977:00 Shift Solenoid "B" Control Circuit High: No Sub Type Information Open circuit or short to power in the solenoid or wire harness.

    Possible Sources 

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

  2. B1 RETRIEVE AND RECORD ALL DTCS

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

    Are diagnostic trouble codes (DTCs) P0755, P0758, P0759, P0976 and/or P0977 present? 

    Yes  For diagnostic trouble codes (DTCs) P0755, P0758 and P0759, GO to  B2 For DTC P0976, GO to  B5 For DTC P0977, GO to  B7
    No  REFER to: Diagnosis By Symptom .

  3. B2 CHECK THE SHIFT SOLENOID B (SSB) 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-9
      GFD304648Courtesy of FORD MOTOR COMPANY
      		 C175E-87

    Is the resistance less than 3 ohms? 

    Yes  GO to  B3
    No  REPAIR the circuit.

  4. B3 CHECK THE SHIFT SOLENOID B (SSB) FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      Component side resistance pin 9.
      GFD304648Courtesy of FORD MOTOR COMPANY
      		 Component side resistance pin 5.

    Is the resistance between 4.2 and 7.2 ohms? 

    Yes  Refer to PCM Guided Routine Testing .
    No  GO to  B4

  5. B4 CHECK SHIFT SOLENOID B (SSB) 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
      SSB pin A.
      GFD304648Courtesy of FORD MOTOR COMPANY
      		 SSB pin B.

    Is the resistance between 4.2 and 7.2 ohms? 

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

  6. B5 CHECK THE SHIFT SOLENOID B (SSB) 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-9
      GFD304648Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  B6
    No  REPAIR the circuit.

  7. B6 CHECK SHIFT SOLENOID B (SSB) 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
      SSB pin A.
      GFD304648Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 3 ohms? 

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

  8. B7 CHECK THE SHIFT SOLENOID B (SSB) CONTROL CIRCUIT FOR A SHORT TO POWER

    • 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.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C168A-9
      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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