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Home >> Ford >> 2015 >> Transit-150 Base, 3.2L Eng VIN V >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Pinpoint Tests (Diesel) >> Pinpoint Test AR: Misfire >> Test Procedure

Test Procedure

  1. AR1 CHECK FOR DTCS 

    Are DTCs P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 or P0308 present? 

    Yes No
    GO to  AR3. GO to AR2  .
  2. AR2 RECREATE THE MISFIRE SYMPTOM USING FREEZE FRAME AND CUSTOMER INFORMATION 
    NOTE: To recreate the original conditions that set the DTC or caused the symptom, the vehicle may require driving.
    • Access the misfire freeze frame data (if available) and record the operating conditions.
    • Obtain information from the customer information worksheet or any other available data from the customer.
    • Recreate the misfire symptom using the freeze frame and customer information.

    Can the symptom be recreated? 

    Yes No
    GO to AR3  . Unable to duplicate or identify the concern at this time. REFER to NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART INDEX , if a driveability concern exists.
  3. AR3 CHECK FOR OTHER NON-MISFIRE CONTINUOUS MEMORY DTCS 

    Are there any non-misfire continuous memory DTCs present? 

    Yes No
    DISREGARD the current diagnostic trouble code (DTC) at this time. DIAGNOSE the next DTC. GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS . GO to AR4  .
  4. AR4 CHECK FOR DTCS 
    • Carry out the PCM KOEO self-test.
    • Carry out the PCM KOER self-test.
    • Carry out the injector electrical self-test.

    Are any DTCs present? 

    Yes No
    DISREGARD the current diagnostic trouble code (DTC) at this time. DIAGNOSE the next DTC. GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS . GO to AR5  .
  5. AR5 CHECK THE LOW PRESSURE FUEL SYSTEM 
    NOTE: The FP runs for 30 seconds then shut off at ignition ON, engine OFF.
    • For vehicles with a LP_FUEL_SW PID,
    • Ignition ON, engine OFF.
    • Access the PCM and monitor the LP_FUEL_SW (MODE) PID.
    • Access the PCM and control the FPL_CMD (MODE) PID.
    • Command the fuel pump ON.
    • For all others,
    • Ignition OFF.
    • Connect the low pressure fuel supply line to the secondary fuel filter.
    • Disconnect the injection pump fuel supply tube from the fuel filter to fuel injection pump supply tube quick connect coupling.
    • Install the Fuel Line Adapter 310-159 or equivalent and the DSL ENG Pressure Test Kit 014-00761 or equivalent to the fuel filter to fuel injection pump supply tube quick connect coupling at the fuel injection pump supply tube.
    • Ignition ON, engine OFF.
    • Access the PCM and control the FPL_CMD (MODE) PID.
    • Command the FP ON.

    Does the PID state change (vehicles with the LP_FUEL_SW PID) or is the low pressure fuel system pressure greater than 379 kPa (55 psi) (all others)? 

    Yes No
    GO to AR6  . GO to PINPOINT TEST MA .
  6. AR6 RELATIVE COMPRESSION TEST 
    • Carry out the Relative Compression Test. Refer to the scan tool manufacturer's manual for specific information on the scan tool setup, operation, and specific cables and adapters required.

    Do all cylinders pass the test? 

    Yes No
    GO to AR7  . GO to  AR9.
  7. AR7 CYLINDER POWER BALANCE CHECK 
    • Carry out the Power Balance Test. Refer to the scan tool manufacturer's manual for specific information on the scan tool setup, operation, and specific cables and adapters required.

    Are all cylinders contributing correctly during the power balance test? 

    Yes No
    GO to PINPOINT TEST M . GO to AR8  .
  8. AR8 CHECK THE SUSPECT FUEL INJECTOR RESISTANCE AT THE FUEL INJECTOR 
    NOTE: Only diagnose the fuel injectors for the cylinders identified as weak during the power balance test.
    • Suspect Fuel Injector connector disconnected.
    • Measure the resistance between:
      (+) Suspect Fuel Injector Connector, Component Side (-) Suspect Fuel Injector Connector, Component Side
      Fuel Injector, Ground Fuel Injector, Power

    Is the resistance between 150K - 210K ohms? 

    Yes No
    GO to AR9  . GO to PINPOINT TEST P .
  9. AR9 CARRY OUT A CYLINDER COMPRESSION TEST ON THE SUSPECT CYLINDER 
    • Carry out a visual inspection for the following mechanical concerns:
      • push rods
      • rocker arms
      • valves
      • valve springs
    • Carry out a cylinder compression test on the suspect cylinder. Refer to the service information , Engine System - General Information.

    Are any concerns present? 

    Yes No
    REPAIR as necessary.
    Clear the PCM DTCs. REPEAT the self-test.    		 GO to AR10  .
  10. AR10 CHECK FOR A LEAKING FUEL INJECTOR 
    • Disconnect all the fuel injector electrical connectors.
    • Remove the glow plug from the suspect cylinder.
    • Crank the engine.
    • Observe the glow plug hole for a fuel mist.

    Is there any fuel mist from the glow plug hole? 

    Yes No
    INSTALL a new Fuel Injector. REFER to the service information , Fuel Charging and Controls.
    Clear the PCM DTCs. REPEAT the self-test.    		 GO to PINPOINT TEST M .
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