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Home >> Ford >> 2018 >> Transit Connect XL, Van Cargo >> Repair and Diagnosis >> Electrical >> Charging Systems >> Charging System - General Information >> Diagnosis And Testing >> Charging System - 2.5L Duratec (125kW/170PS) >> Pinpoint Tests >> Pinpoint Test E : DTC U012D, U042E >> Pinpoint Test E : DTC U012D, U042E

Pinpoint Test E : DTC U012D, U042E

NOTE: Make sure battery voltage is greater than 12.2 volts prior to and during this pinpoint test.
NOTE: Do not have a battery charger attached during vehicle testing.

  1. E1 COMPARE THE GENERATOR B+ CIRCUIT TO BATTERY VOLTAGE

    • Ignition OFF.

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      GFD305586Courtesy of FORD MOTOR COMPANY
      GFD305559Courtesy of FORD MOTOR COMPANY
      GFD305587Courtesy of FORD MOTOR COMPANY

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C1104A-1
      GFD305559Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage within 0.5 volt of the recorded battery voltage? 

    Yes  GO to  E2
    No  TIGHTEN or INSTALL a new generator B+ nut as needed. REFER to: Generator - 2.5L Duratec (125kW/170PS) . VERIFY high current BJB fuse MEGA 2 (150A) is OK. If OK, REPAIR the circuit. If not OK, REFER to OEM Electrical Wiring Diagram Introduction to identify the possible causes of the circuit short.

  2. E2 CHECK THE GENERATOR LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect Generator C1104B.

    • Disconnect PCM C175B.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C1104B-2
      GFD305559Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  E3

  3. E3 CHECK THE GENERATOR LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C1104B-2
      GFD305589Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  E4
    No  REPAIR the circuit.

  4. E4 CHECK THE GENERATOR LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C1104B-2
      GFD305589Courtesy of FORD MOTOR COMPANY
      		 C175B-74

    Is the resistance less than 3 ohms? 

    Yes  INSTALL a new generator. REFER to: Generator - 2.5L Duratec (125kW/170PS) . REPEAT the PCM self-test. If DTC U012D is retrieved again, GO to  E5
    No  REPAIR the affected circuit.

  5. E5 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 the 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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