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Home >> Ford >> 2021 >> Explorer Limited Hybrid, RWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Electric Powertrain Control - 3.3L DURATEC-V6 - Hybrid (BP) (2 Of 2) >> Diagnosis And Testing >> Electric Powertrain Control >> Pinpoint Tests >> Pinpoint Test W : P0A4D

Pinpoint Test W : P0A4D

  1. 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 P0A4D:00 Generator Position Sensor Circuit Low: No Sub Type Information This DTC sets when a circuit fault is detected in the resolver excitation circuit.

    Possible Sources 

    • Wiring, terminals or connectors

  2. W1 CHECK THE TRANSMISSION SENSOR SPEED RESOLVER FOR AN OPEN

    • Ignition OFF.

    • Disconnect Inverter System Controller (ISC) C1458A.

    • Disconnect Transmission Sensor Speed Resolver C1280.

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1458A-A1 
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1280-3
      C1458A-B1
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1280-4
      C1458A-A2
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1280-1
      C1458A-B2
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1280-5
      C1458A-A3
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1280-2
      C1458A-B3
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1280-6

    Are the resistances less than 5 ohms? 

    Yes  GO to  W2
    No  REPAIR the open circuit. CLEAR the DTCs and REPEAT the self-test.

  3. W2 CHECK THE TRANSMISSION SENSOR SPEED RESOLVER CIRCUITS FOR A SHORT TO GROUND

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1458A-A1
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1458A-B1
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1458A-A2
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1458A-B2
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1458A-A3
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1458A-B3
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10K ohms? 

    Yes  GO to  W3
    No  REPAIR the short circuit. CLEAR the DTCs and REPEAT the self-test.

  4. W3 CHECK THE INVERTER SYSTEM CONTROLLER (ISC) CIRCUITS FOR SHORTED TOGETHER

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1458A-A1
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1458A-B1
      C1458A-A1
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1458A-A2
      C1458A-A1
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1458A-B2
      C1458A-A1
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1458A-A3
      C1458A-A1
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1458A-B3
      C1458A-B1
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1458A-A2
      C1458A-B1
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1458A-B2
      C1458A-B1
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1458A-A3
      C1458A-B1
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1458A-B3
      C1458A-A2
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1458A-B2
      C1458A-A2
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1458A-A3
      C1458A-A2
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1458A-B3
      C1458A-B2
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1458A-A3
      C1458A-B2
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1458A-B3
      C1458A-A3
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1458A-B3

    Are the resistances greater than 10K ohms? 

    Yes  GO to  W4
    No  REPAIR the short circuit. CLEAR the DTCs and REPEAT the self-test.

  5. W4 CHECK THE INVERTER SYSTEM CONTROLLER (ISC) CIRCUITS FOR A SHORT TO VOLTAGE

    • Ignition ON.

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1458A-A1
      GFD513962Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1458A-B1
      GFD513962Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1458A-A2
      GFD513962Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1458A-B2
      GFD513962Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1458A-A3
      GFD513962Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1458A-B3
      GFD513962Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the short circuit. CLEAR the DTCs and REPEAT the self-test.
    No  GO to  W5

  6. W5 CHECK THE TRANSMISSION SENSOR SPEED RESOLVER RESISTANCE

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1280 pin 3, component side
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1280 pin 4, component side

    Is the resistance between 8 and 18 ohms? 

    Yes  GO to  W6
    No  INSTALL a new electric motor. REFER to: Hybrid Drive Unit .

  7. W6 CHECK THE TRANSMISSION SENSOR SPEED RESOLVER RESISTANCE

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1280 pin 1, component side
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1280 pin 5, component side

    Is the resistance between 27 and 37 ohms? 

    Yes  GO to  W7
    No  INSTALL a new electric motor. REFER to: Hybrid Drive Unit .

  8. W7 CHECK THE TRANSMISSION SENSOR SPEED RESOLVER RESISTANCE

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1280 pin 2, component side
      GFD513961Courtesy of FORD MOTOR COMPANY
      		 C1280 pin 6, component side

    Is the resistance between 32 and 42 ohms? 

    Yes  Refer to Pinpoint Tests Z: Intermittent to continue diagnostics.
    No  INSTALL a new electric motor. REFER to: Hybrid Drive Unit .
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