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Pinpoint Test A: Slow To Fill

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  1. Normal Operation and Fault Conditions 

    REFER to: Fuel System - Overview .

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    PCM P144B:00 EVAP System Secondary Purge Vapor Line Restricted/Blocked: No Sub Type Information Evaporative Emission System Secondary Purge Vapor Line Restricted/Blocked
    PCM P24C0:00 EVAP System Leak Detection Pump Switching Valve Stuck On: No Sub Type Information Evaporative Emission System Leak Detection Pump Switching Valve Stuck On

    Possible Sources 

    • Fuel tank filler pipe

  2. A1 CHECK THE FUEL SYSTEM COMPONENTS FOR SIGNS OF DAMAGE

    • Visually inspect the following components for signs of damage:

      • Fuel tank filler pipe
      • Fuel tank filler pipe vent tube, (if equipped)
      • EVAP system (look for kinked or bent vapor lines)
      • Fuel tank inlet check valve (part of the fuel tank)
      • Fuel level vent valve (part of the fuel tank)
      • EVAP canister (may be saturated with liquid)

    Are any of the components damaged? 

    Yes  REPAIR or INSTALL a new components to correct the concern.
    No  GO to  A2

  3. A2 CHECK THE SYSTEM FOR ANY INDICATION TYPE DTC (DIAGNOSTIC TROUBLE CODE) S

    • Using a diagnostic scan tool, perform the PCM self-test.

    • Check for any of the following indication DTCs: P25B0, P0461, P0462, P0463.

    Are any indication DTCs present? 

    Yes  If DTC's are present, refer to REFER to: FUEL TANK AND LINES .
    No  If no DTC's proceed to check for EVAPDTCs. GO to  A3

  4. A3 CHECK THE SYSTEM FOR ANY EVAP (EVAPORATIVE EMISSION) DTCS

    • Using a diagnostic scan tool, perform the PCM self-test.

    • Check the PCM for any of the EVAPDTCs: P00FE, P04B4, P04F0, P04F1, P0496, P24BD, P24BE, P24BF, P24C1, P144B, P2418, P2419, P2420, P2450, P2451, P0451, P0452 and P0453.

    Are any EVAP system DTC's present? 

    Yes  REFER to: FUEL TANK AND LINES .
    No  GO to  A4

  5. A4 MONITOR THE FTP WHILE FILLING THE FUEL TANK

    • Monitor the fuel tank pressure (FTP) for typical diagnostic reference values while filling the fuel tank.

      Access the PCM and monitor the FTP_V (V) PID

    Is the FTP less than 1" H2O / 0.25 kPa? 

    Yes  GO to  A5
    No  Is the FTP less than 12" H2O / 3.0 kPa? Yes : GO to  A6 No : GO to  A7

  6. A5 INSPECT THE FUEL FILLER PIPE and VAPOR RECIRCULATION LINE ASSEMBLY

    • Disconnect the fuel filler pipe from the fuel tank.

    • Inspect the fuel filler pipe for damage or blockage.

    Is the fuel filler pipe assembly blocked or damaged? 

    Yes  Replace the fuel filler pipe assembly. REFER to: Fuel Tank Filler Pipe .
    No  Replace the fuel tank assembly. REFER to: Fuel Tank .

  7. A6 REFUEL USING A DIFFERENT FUEL FILL NOZZLE

    • Using a different fuel pump nozzle, monitor the fuel tank pressure (FTP) for typical diagnostic reference values while filling the fuel tank.

      Access the PCM and monitor the FTP_V (V) PID

    Is the FTP less than 12" H2O / 3.0 kPa? 

    Yes  System Normal - Unable to identify the root cause at this time.
    No  GO to  A7

  8. A7 DIAGNOSE THE FRESH AIR HOSE

    • Disconnect the fresh air line from evaporative leak detection pump (ELDP).

    Is the fresh air hose blocked or damaged? 

    Yes  Repair / Replace the fresh air hose.
    No  GO to  A8

  9. A8 DIAGNOSE THE EVAPORATIVE LEAK DETECTION PUMP (ELDP)

    • Disconnect the evaporative leak detection pump (ELDP) from the EVAP canister.

    • Monitor the fuel tank pressure (FTP) to typical diagnostic reference values while filling the fuel tank.

      Access the PCM and monitor the FTP_V (V) PID

    Is the FTP less than 12" H2O / 3.0 kPa? 

    Yes  Remove / Replace the evaporative leak detection pump (ELDP). REFER to: Evaporative Emission System Leak Test .
    No  GO to  A9

  10. A9 DIAGNOSE THE EVAP CANISTER

    • Disconnect the EVAP canister from the fuel vapor load line.

    • Monitor the fuel tank pressure (FTP) to typical diagnostic reference values while filling the fuel tank.

      Access the PCM and monitor the FTP_V (V) PID

    Is the FTP less than 12" H2O / 3.0 kPa? 

    Yes  Remove / Replace the EVAP canister. REFER to: Evaporative Emission Canister .
    No  Remove / Replace the fuel vapor line including the fuel vapor vent valve (FVVV) and fuel tank isolation valve (FTIV).
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