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Pinpoint Test Bu: P0C50

  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 P0C50:00 Drive Motor 'A' Position Sensor Circuit 'A': No Sub Type Information This DTC sets when a wiring concern in the harness between the Inverter System Controller (ISC) and the transmission is detected.

    Possible Causes 

    • Wiring, terminals or connectors
    • Transmission

  2. BU1 CHECK FOR INVERTER SYSTEM CONTROLLER (ISC) DTC (DIAGNOSTIC TROUBLE CODE) P0C51

    NOTE: Wiring overlays or repinning of circuits are NOT appropriate for DTCs P0C50 due to risk of hardware damage.

    • Ignition ON.

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

    Was DTC P0C51 read from the Inverter System Controller (ISC)? 

    Yes  GO to Pinpoint Test AD
    No  GO to  BU2

  3. BU2 CHECK 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  BU3
    No  UPDATE the Inverter System Controller (ISC) to the latest calibration level.

  4. BU3 VISUAL INSPECTION OF THE LOW VOLTAGE SYSTEM

    • Ignition OFF.

    • Visually inspect all the low voltage cables.

    • Make sure all the low voltage connectors are correctly and securely connected and latched.

    • Examine all the low voltage cables and connectors for damaged, burned or overheated insulation and loose or broken conditions.

    Is a concern present? 

    Yes  REPAIR as necessary. CLEAR the Inverter System Controller (ISC) DTC s and REPEAT the self-test.
    No  GO to  BU4

  5. BU4 CHECK FOR INVERTER SYSTEM CONTROLLER (ISC) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Ignition ON.

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

    Was DTC P0A3F, P0C55, P0C57, P0C58, P0C52 or P0C53 read from the Inverter System Controller (ISC)? 

    Yes  For P0A3F, GO to Pinpoint Test BT  For P0C55 GO to Pinpoint Test CE  For P0C57 GO to Pinpoint Test CF  For P0C58 GO to Pinpoint Test CG  For P0C52 GO to Pinpoint Test CC  For P0C53 GO to Pinpoint Test CD 
    No  GO to  BU5

  6. BU5 CHECK THE MOTOR RESOLVER RESISTANCE

    • Use this image as reference when performing the following test.

      Connector C1111 component side 

      GFD828931Courtesy of FORD MOTOR COMPANY

    • Disconnect HF 45 Transmission C1111.

    • Disconnect Inverter System Controller (ISC) C199B.

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      HF45 Transmission C1111 pin 1, component side
      GFD826402Courtesy of FORD MOTOR COMPANY
      		 HF45 Transmission C1111 pin 11, component side

    Is the resistance between 7.6 and 11.4 ohms? 

    Yes  GO to  BU6
    No  INSTALL a new transmission, this does not and should not include a new Inverter System Controller (ISC)/SOBDMC. REFER to: Transmission .
    CLEAR the Inverter System Controller (ISC) DTC s. REPEAT the self-test.

  7. BU6 CHECK THE MOTOR RESOLVER RESISTANCE

    • Use this image as reference when performing the following test.

      Connector C1111 component side 

      GFD828931Courtesy of FORD MOTOR COMPANY

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      HF45 Transmission C1111 pin 3, component side
      GFD826402Courtesy of FORD MOTOR COMPANY
      		 HF45 Transmission C1111 pin 13, component side

    Is the resistance between 11.6 and 17.4 ohms? 

    Yes  GO to  BU7
    No  INSTALL a new transmission, this does not and should not include a new Inverter System Controller (ISC)/SOBDMC. REFER to: Transmission .
    CLEAR the Inverter System Controller (ISC) DTC s. REPEAT the self-test.

  8. BU7 CHECK THE MOTOR RESOLVER RESISTANCE

    • Use this image as reference when performing the following test.

      Connector C1111 component side 

      GFD828931Courtesy of FORD MOTOR COMPANY

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      HF45 Transmission C1111 pin 2, component side
      GFD826402Courtesy of FORD MOTOR COMPANY
      		 HF45 Transmission C1111 pin 12, component side

    Is the resistance between 11.2 and 16.8 ohms? 

    Yes  GO to  BU8
    No  INSTALL a new transmission, this does not and should not include a new Inverter System Controller (ISC)/SOBDMC. REFER to: Transmission .
    CLEAR the Inverter System Controller (ISC) DTC s. REPEAT the self-test.

  9. BU8 CHECK THE MOTOR RESOLVER MS2 CIRCUIT FOR A SHORT

    • Use this image as reference when performing the following test.

      Connector C1111 component side 

      GFD828931Courtesy of FORD MOTOR COMPANY

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1111 pin 13, component side
      GFD826402Courtesy of FORD MOTOR COMPANY
      		 C1111 all pins except pin 3, component side

    Is the resistance greater than 10K ohms? 

    Yes  GO to  BU9
    No  INSTALL a new transmission, this does not and should not include a new Inverter System Controller (ISC)/SOBDMC. REFER to: Transmission .
    CLEAR the Inverter System Controller (ISC) DTC s. REPEAT the self-test.

  10. BU9 CHECK THE MOTOR RESOLVER MS1 CIRCUIT FOR A SHORT

    • Use this image as reference when performing the following test.

      Connector C1111 component side 

      GFD828931Courtesy of FORD MOTOR COMPANY

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1111 pin 12, component side
      GFD826402Courtesy of FORD MOTOR COMPANY
      		 C1111 all pins except pin 2, component side

    Is the resistance greater than 10K ohms? 

    Yes  GO to  BU10
    No  INSTALL a new transmission, this does not and should not include a new Inverter System Controller (ISC)/SOBDMC. REFER to: Transmission .
    CLEAR the Inverter System Controller (ISC) DTC s. REPEAT the self-test.

  11. BU10 CHECK THE MOTOR RESOLVER MR2 CIRCUIT FOR A SHORT

    • Use this image as reference when performing the following test.

      Connector C1111 component side 

      GFD828931Courtesy of FORD MOTOR COMPANY

    • Measure and record:
      C1111 pin 11, component side
      GFD826402Courtesy of FORD MOTOR COMPANY
      		 C1111 all pins except pin 1, component side

    Is the resistance greater than 10K ohms? 

    Yes  GO to  BU11
    No  INSTALL a new transmission, this does not and should not include a new Inverter System Controller (ISC)/SOBDMC. REFER to: Transmission .
    CLEAR the Inverter System Controller (ISC) DTC s. REPEAT the self-test.

  12. BU11 CHECK THE MOTOR RESOLVER SENSOR FOR A SHORT TO GROUND

    • Use this image as reference when performing the following test.

      Connector C1111 component side 

      GFD828931Courtesy of FORD MOTOR COMPANY

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1111 pin 13, component side
      GFD826402Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1111 pin 3, component side
      GFD826402Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1111 pin 12, component side
      GFD826402Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1111 pin 2, component side
      GFD826402Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1111 pin 1, component side
      GFD826402Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1111 pin 11, component side
      GFD826402Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10K ohms? 

    Yes  GO to  BU12
    No  INSTALL a new transmission, this does not and should not include a new Inverter System Controller (ISC)/SOBDMC. REFER to: Transmission .
    CLEAR the Inverter System Controller (ISC) DTC s. REPEAT the self-test.

  13. BU12 CHECK THE MOTOR RESOLVER HARNESS CIRCUITS FOR AN OPEN

    Is the resistance less than 3 ohms? 

    Yes  GO to  BU13
    No  INSTALL a new harness.

  14. BU13 CHECK THE MOTOR RESOLVER HARNESS CIRCUITS FOR A SHORT TOGETHER

    Is the resistance greater than 10K ohms? 

    Yes  GO to  BU14
    No  INSTALL a new harness.

  15. BU14 CHECK THE MOTOR RESOLVER HARNESS CIRCUITS FOR A SHORT TO GROUND

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1111 Pin 13
      GFD826402Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1111 Pin 3
      GFD826402Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1111 Pin 12
      GFD826402Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1111 Pin 2
      GFD826402Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1111 Pin 1
      GFD826402Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1111 Pin 11
      GFD826402Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance above 10K ohms? 

    Yes  GO to  BU15
    No  INSTALL a new harness.

  16. BU15 CHECK THE MOTOR RESOLVER HARNESS CIRCUITS FOR A SHORT TO VOLTAGE

    • Ignition ON.

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1111 Pin 13
      GFD826403Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1111 Pin 3
      GFD826403Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1111 Pin 12
      GFD826403Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1111 Pin 2
      GFD826403Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1111 Pin 1
      GFD826403Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1111 Pin 11
      GFD826403Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  INSTALL a new harness.
    No  GO to  BU16

  17. BU16 CHECK THE MOTOR RESOLVER CIRCUITS FOR A SHORT TO THE EXTERNAL CABLE SHIELD

    • Ignition OFF.

    Is the resistance more than 10, 000 ohms? 

    Yes  GO to  BU17
    No  INSTALL a new harness.

  18. BU17 CHECK FOR CORRECT INVERTER SYSTEM CONTROLLER (ISC) OPERATION

    • Ignition OFF.

    • Disconnect and inspect all Inverter System Controller (ISC) 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 Inverter System Controller (ISC) connectors. Make sure they seat and latch correctly.

    • Connect HF45 Transmission C1111.

    • Ignition ON.

    • Ignition OFF.

    • Wait 5 minutes.

    • Ignition ON.

    • Clear the Inverter System Controller (ISC) DTC s

    • Ignition OFF.

    • Start the engine.

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

    Is the concern still present? 

    Yes  GO to  BU18
    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.

  19. BU18 CHECK FOR APPLICABLE SERVICE ARTICLES

    • CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA.

    Was a service article found? 

    Yes  DISCONTINUE this test and FOLLOW the service article instructions.
    No  REFER to: Powertrain Control Module (PCM) Input and Output Controls .
    Pinpoint Test Z.
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