LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2021 >> F-150 Raptor >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Pinpoint Tests (Diesel) >> Pinpoint Tests RG: Reductant Pump >> Test Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Test Procedure

  1. RG1 PRELIMINARY DIAGNOSIS 

    Are DTCs P130E, P208A, P208B, P208C, P208D, P20E8, P20E9, P20FF, P204F, P218F, P214E, P21CB, P21CC or U040F present? 

    Yes No
    For Transit Connect, GO to  RG2.
    For all others with DTC P20FF, INSTALL a new Reductant Pump Control Module. REFER to the appropriate Engine Emission Control article.
    CLEAR the DTCs. REPEAT the self-test.
    For all others, GO to  RG7.    		 RETURN to SYMPTOM CHARTS for further direction.
  2. RG2 CHECK THE REDUCTANT PUMP MOTOR FOR INTERNAL SHORTS 
    • Reductant Pump Assembly connector disconnected.
    • Measure the resistance between:
    (+) Reductant Pump Assembly Connector, Component Side (-) Reductant Pump Assembly Connector, Component Side
    RDPC RDPPWR

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  RG3. INSTALL a new Reductant Pump assembly. REFER to the appropriate Engine Emission Control article. Clear the RDCM and PCM DTCs. REPEAT the self-test.
  3. RG3 CHECK THE VPWR CIRCUIT FOR VOLTAGE 
    NOTE: The VPWR voltage will drop soon after the ignition is turned ON. Connect the digital multimeter before turning the ignition ON.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
    (+) Reductant Pump Assembly Connector, Harness Side (-)
    RDPPWR Ground

    Is the voltage greater than 10 V? 

    Yes No
    GO to  RG4. REPAIR the open circuit. Clear the RDCM and PCM DTCs. REPEAT the self-test.
  4. RG4 CHECK THE RDPC AND RDPPWR CIRCUITS FOR AN OPEN 
    • Ignition OFF.
    • Reductant Dosage Control Module connector disconnected.
    • Measure the resistance between:
    (+) Reductant Pump Assembly Connector, Harness Side (-) Reductant Dosage Control Module Connector, Harness Side
    RDPC RDPC - Pin 29
    RDPPWR RDPPWR - Pin 51

    Are the resistances less than 5 ohms? 

    Yes No
    GO to  RG5. For DTC P130E, REPAIR the open circuit.
    CARRY OUT the Selective Catalytic Reduction (SCR) System Procedure. REFER to DRIVE CYCLES . DRIVE the vehicle until the system warning message has cleared from the instrument cluster message center. Clear the RDCM and PCM DTCs. REPEAT the self-test.
    For all others, REPAIR the open circuit. Clear the RDCM and PCM DTCs. REPEAT the self-test.
  5. RG5 CHECK THE RDPC CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between:
    (+) Reductant Pump Assembly Connector, Harness Side (-)
    RDPC Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  RG6. REPAIR the short circuit. Clear the RDCM and PCM DTCs. REPEAT the self-test.
  6. RG6 CHECK THE RDPC CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition ON, engine OFF.
    • Measure the voltage between:
    (+) Reductant Pump Assembly Connector, Harness Side (-)
    RDPC Ground

    Is any voltage present? 

    Yes No
    REPAIR the short circuit. Clear the RDCM and PCM DTCs. REPEAT the self-test. GO to  RG19.
  7. RG7 CHECK THE VOLTAGE TO THE REDUCTANT PUMP CONTROL MODULE 
    • Ignition OFF.
    • Reductant Pump Control Module connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
    (+) Reductant Pump Control Module Connector, Harness Side (-)
    VPWR - Pin 5 Ground

    Is the voltage greater than 10.5 V? 

    Yes No
    GO to  RG8. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  8. RG8 CHECK THE GND CIRCUIT FOR AN OPEN 
    • Measure the resistance between:
    (+) Reductant Pump Control Module Connector, Harness Side (-)
    GND - Pin 1, 8 Ground

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  RG9. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  9. RG9 CHECK THE RDPC AND RDPM CIRCUITS FOR AN OPEN 
    • PCM-T connector disconnected.
    • Measure the resistance between:
    (+) Reductant Pump Control Module Connector, Harness Side (-) PCM-T Connector, Harness Side
    RDPC - Pin 4 RDPC - Pin 17
    RDPM - Pin 3 RDPM - Pin 20

    Are the resistances less than 5 ohms? 

    Yes No
    GO to  RG10. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  10. RG10 CHECK THE RDPC AND RDPM CIRCUITS FOR A SHORT TO GROUND 
    • Measure the resistance between:
    (+) Reductant Pump Control Module Connector, Harness Side (-)
    RDPC - Pin 4 Ground
    RDPM - Pin 3 Ground

    Are the resistances greater than 10K ohms? 

    Yes No
    GO to  RG11. REPAIR the short circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  11. RG11 CHECK THE RDPC AND RDPM CIRCUITS FOR A SHORT TO VOLTAGE 
    • Ignition ON, engine OFF.
    • Measure the voltage between:
    (+) Reductant Pump Control Module Connector, Harness Side (-)
    RDPC - Pin 4 Ground
    RDPM - Pin 3 Ground

    Is any voltage present? 

    Yes No
    REPAIR the short circuit. Clear the PCM DTCs.
    REPEAT the self-test.    		 GO to  RG12.
  12. RG12 CHECK THE REDUCTANT PUMP MOTOR FOR INTERNAL SHORTS 
    • Ignition OFF.
    • Reductant Pump Assembly connector disconnected.
    • Measure the resistance between:
    (+) Reductant Pump Assembly Connector, Component Side (-) Reductant Pump Assembly Connector, Component Side
    RDPAP GND
    RDPBP GND
    RDPCP GND
    RDPAP GND
    RDPBP GND
    RDPCP GND

    Are the resistances greater than 10K ohms? 

    Yes No
    GO to  RG13. INSTALL a new Reductant Pump assembly. REFER to the appropriate Engine Emission Control article.
    Clear the PCM DTCs. REPEAT the self-test.
  13. RG13 CHECK THE REDUCTANT PUMP MOTOR RESISTANCE 
    • Measure the resistance between:
    (+) Reductant Pump Assembly Connector, Component Side (-) Reductant Pump Assembly Connector, Component Side
    RDPAP RDPBP
    RDPAP RDPCP
    RDPBP RDPCP

    Are the resistances between 0.36 - 0.42 ohms? 

    Yes No
    GO to  RG14. INSTALL a new Reductant Pump assembly. REFER to the appropriate Engine Emission Control article.
    Clear the PCM DTCs. REPEAT the self-test.
  14. RG14 CHECK THE REDUCTANT PUMP MOTOR DRIVE CIRCUITS FOR AN OPEN 
    • Measure the resistance between:
    (+) Reductant Pump Control Module Connector, Harness Side (-) Reductant Pump Assembly Connector, Harness Side
    RDPAP - Pin 6 RDPAP
    RDPBP - Pin 2 RDPBP
    RDPCP - Pin 7 RDPCP

    Are the resistances less than 5 ohms? 

    Yes No
    GO to  RG15. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  15. RG15 CHECK THE REDUCTANT PUMP MOTOR DRIVE CIRCUITS FOR A SHORT TO GROUND 
    • Measure the resistance between:
    (+) Reductant Pump Assembly Connector, Harness Side (-)
    RDPAP Ground
    RDPBP Ground
    RDPCP Ground

    Are the resistances greater than 10K ohms? 

    Yes No
    For DTCs P208A, P208B, P208C or P208D, GO to  RG16.
    For all others, GO to  RG17.    		 REPAIR the short circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  16. RG16 CHECK FOR THE RDPAP, RDPBP AND RDPCP CIRCUITS SHORTED TOGETHER 
    • Ignition OFF.
    • Reductant Pump Assembly connector disconnected.
    • Measure the resistance between:
    (+) Reductant Pump Assembly Connector, Harness Side (-) Reductant Pump Assembly Connector, Harness Side
    RDPAP RDPBP
    RDPAP RDPCP
    RDPBP RDPCP

    Are the resistances greate than 10K ohms? 

    Yes No
    INSTALL a new Reductant Pump assembly. REFER to the appropriate Engine Emission Control article.
    Clear the PCM DTCs. REPEAT the self-test.    		 REPAIR as necessary.
    Clear the PCM DTCs. REPEAT the self-test.
  17. RG17 CHECK THE REDUCTANT PUMP MOTOR DRIVE CIRCUITS FOR A SHORT TO VOLTAGE 
    • Ignition ON, engine OFF.
    • Measure the voltage between:
    (+) Reductant Pump Assembly Connector, Harness Side (-)
    RDPAP Ground
    RDPBP Ground
    RDPCP Ground

    Is any voltage present? 

    Yes No
    REPAIR the short circuit. Clear the PCM DTCs.
    REPEAT the self-test.    		 GO to  RG18.
  18. RG18 INTERMITTENT CHECK 
    • Measure the resistance between:
      (+) Reductant Pump Control Module Connector, Harness Side (-) PCM-T Connector, Harness Side
      RDPC - Pin 4 RDPC - Pin 17
      RDPM - Pin 3 RDPM - Pin 20
    • While monitoring the resistance measurement, wiggle, shake, and bend small sections of the wiring harness while working from the reductant pump control module to the PCM.
    • Measure the resistance between:
      (+) Reductant Pump Control Module Connector, Harness Side (-) Reductant Pump Assembly Connector, Harness Side
      RDPAP - Pin 6 RDPAP
      RDPBP - Pin 2 RDPBP
      RDPCP - Pin 7 RDPCP
    • While monitoring the resistance measurement, wiggle, shake, and bend small sections of the wiring harness while working from the reductant pump control module to the reductant pump assembly.

    Is a concern present? 

    Yes No
    REPAIR as necessary.
    Clear the PCM DTCs. REPEAT the self-test.    		 For DTC U040F, INSTALL a new Reductant Pump Control Module. REFER to the appropriate Engine Emission Control article.
    Clear the PCM DTCs. REPEAT the self-test.
    For all others, GO to  RG19.
  19. RG19 CHECK FOR CORRECT REDUCTANT PUMP OPERATION 
    • For Transit Connect,
    • Reductant Pump Assembly connector connected.
    • Reductant Dosage Control Module connector connected.
    • Ignition ON, engine OFF.
    • Access the DCU and monitor the REDUCT_TNK_P (PRESS) PID.
    • Carry out the SCR Leak Test on the scan tool to pressurize the system.
    • For all others,
    • PCM-T connector connected.
    • Reductant Pump Assembly connector connected.
    • Reductant Pump Control Module connector connected.
    • Ignition ON, engine OFF.
    • Access the PCM and monitor the REDUCT_TNK_P (PRESS) PID.
    • Carry out the SCR Leak Test on the scan tool to pressurize the system.

    Does the REDUCT_TNK_P PID value increase to greater than 65 psi? 

    Yes No
    The system is operating correctly at this time.
    The concern may have been caused by a loose or corroded connector.    		 INSTALL a new Reductant Pump assembly.
    REFER to the appropriate Engine Emission Control article.
    Clear the RDCM and PCM DTCs. REPEAT the self-test.
scientia non olet · About LEMON Manuals