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Pinpoint Test Cr : P0E5A, P0E5B

  1. NOTE: The Inverter System Controller (ISC) is referred to as the SOBDMC (Secondary On-Board Diagnostic Control Module C) in the scan tool.

    Normal Operation and Fault Conditions 

    REFER to: Electric Powertrain Control - System Operation and Component Description .

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    SOBDMC P0E5A:00 DC/DC Converter Temperature Sensor "C" Circuit Low: No Sub Type Information This DTC sets if the transmission inductor temperature sensor circuit is open.
    SOBDMC P0E5B:00 DC/DC Converter Temperature Sensor "C" Circuit High: No Sub Type Information This DTC sets if the transmission inductor temperature sensor is shorted.

    Possible Sources 

    • Transmission inductor
    • Wiring, terminals or connectors

  2. CR1 VERIFY THE INVERTER SYSTEM CONTROLLER (ISC) CALIBRATION LEVEL

    • Verify the Inverter System Controller (ISC) is at the latest calibration level.

    Is the Inverter System Controller (ISC) at the latest calibration level? 

    Yes  GO to  CR2
    No  UPDATE the Inverter System Controller (ISC) to the latest calibration level.

  3. CR2 CHECK FOR INVERTER SYSTEM CONTROLLER (ISC) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Ignition OFF.

    • Wait 5 minutes.

    • Ignition ON.

    • Clear the Inverter System Controller (ISC) DTCs

    • Ignition OFF.

    • Wait 5 seconds.

    • Ignition ON.

    • Using a diagnostic scan tool, perform the Inverter System Controller (ISC) self-test.

    Is DTC P0E5A or P0E5B present? 

    Yes  GO to  CR3
    No  The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

  4. CR3 CHECK THE INDUCTOR CIRCUITS FOR AN OPEN

    • Ignition OFF.

    • Disconnect HF 45 Transmission C1111.

    • Disconnect Inverter System Controller (ISC) C199B.

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1111-15
      GFD472563Courtesy of FORD MOTOR COMPANY
      		 C199B-18
      C1111-5
      GFD472563Courtesy of FORD MOTOR COMPANY
      		 C199B-17

    Is the resistance less than 5 ohms? 

    Yes  GO to  CR4
    No  With the aid of the wiring diagram, REPAIR the open circuit. CLEAR the Inverter System Controller (ISC) DTCs. REPEAT the self-test.

  5. CR4 CHECK THE INDUCTOR CIRCUITS FOR A SHORT TO GROUND

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1111-15
      GFD472563Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1111-5
      GFD472563Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance above 10K ohms? 

    Yes  GO to  CR5
    No  With the aid of the wiring diagram, REPAIR the short circuit. CLEAR the Inverter System Controller (ISC) DTCs. REPEAT the self-test.

  6. CR5 CHECK THE INDUCTOR CIRCUITS FOR A SHORT TO VOLTAGE

    • Ignition ON.

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1111-15
      GFD472564Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1111-5
      GFD472564Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  With the aid of the wiring diagram, REPAIR the short circuit. CLEAR the Inverter System Controller (ISC) DTCs and REPEAT the self-test.
    No  GO to  CR6

  7. CR6 CHECK THE TRANSMISSION INDUCTOR RESISTANCE

    • Ignition OFF.

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      GFD475092Courtesy of FORD MOTOR COMPANY

      C1111 pin 15, component side
      GFD472563Courtesy of FORD MOTOR COMPANY
      GFD475092Courtesy of FORD MOTOR COMPANY

      C1111 pin 5, component side

    • Record the measurement result and compare with the expected temperature values below:

      • -40°F (-40°C) 1480 K ohms - 2008 K ohms
      • -31°F (-35°C) 1068 K ohms - 1429 K ohms
      • -22°F (-30°C) 779.9 K ohms - 1029 K ohms
      • -13°F (-25°C) 575.9 K ohms - 749.9 K ohms
      • -4°F (-20°C) 429.7 K ohms - 552.5 K ohms
      • 5°F (-15°C) 323.8 K ohms - 246.3 K ohms
      • 14°F (-10°C) 246.3 K ohms - 309.2 K ohms
      • 23°F (-5°C) 189 K ohms - 234.7 K ohms
      • 32°F (deg.C) 146.3 K ohms - 179.7 K ohms
      • 41°F (5°C) 114.1 K ohms - 138.6 K ohms
      • 50°F (10°C) 89.47 K ohms - 107.8 K ohms
      • 59°F (15°C) 70.93 K ohms - 84.52 K ohms
      • 68°F (20°C) 56.56 K ohms - 66.76 K ohms
      • 77°F (25°C) 45.4 K ohms - 53.11 K ohms
      • 86°F (30°C) 35.69 K ohms - 42.54 K ohms
      • 95°F (35°C) 29.83 K ohms - 34.3 K ohms
      • 104°F (40°C) 24.4 K ohms - 27.82 K ohms

    Is the resistance within specification? 

    Yes  GO to  CR7
    No  REMOVE the transmission REFER to: Transmission . DISASSEMBLE the transmission REFER to: Transmission High Voltage Terminals . INSPECT for internal inductor circuit issues, pinched or chaffed wires, pin issues. If wiring issues are found, INSTALL a new transmission REFER to: Transmission . If no wiring issues are found INSTALL a new inductor, REFER to: Transmission High Voltage Terminals .

  8. CR7 CHECK THE LOW VOLTAGE WIRING FOR AN INTERMITTENT CONCERN

    • Connect Inverter System Controller (ISC) C199B.

    • Connect HF45 Transmission C1111.

    • Verify the connectors seat and latch correctly.

    • Ignition ON.

    • Clear the Inverter System Controller (ISC) DTCs

    • Carefully wiggle all accessible wiring and connectors associated with the low voltage wiring from the Inverter System Controller (ISC) to the transmission.

    • Using a diagnostic scan tool, perform the Inverter System Controller (ISC) self-test.

    Is DTC P0E5A or P0E5B present? 

    Yes  REPAIR the low voltage harness between the Inverter System Controller (ISC) and transmission.
    No  The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition. CLEAR the Inverter System Controller (ISC) DTCs. REPEAT the self-test.
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