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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1827 (Engine Controls - (Hybrid) - Pinpoint Tests DV - JD) >> PINPOINT TEST HX: Evaporative Emission (EVAP) Monitor and System >> Test Procedure

Test Procedure

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. HX1 DIAGNOSTIC TROUBLE CODES (DTCS) P0442, P0443, P0446, P0452, P0453, P0455, P0456, P0457, P0460, P0461, P0462, P0463, P1450, P2418, AND P2450: CHECK FOR SELF-TEST DTCS 
    • Are any of the following DTCs present during PCM or transaxle control module (TCM) self-test: P0442, P0443, P0446, P0452, P0453, P0455, P0456, P0457, P0460, P0461, P0462, P0463, P1450, P2418, or P2450? 
    Yes No
    For continuous memory DTCs P0442 and P0456, GO to  HX47.
    For DTC P0443, GO to  HX2.
    For DTC P0446, GO to  HX33.
    For DTC P0452, GO to  HX18.
    For DTC P0453, GO to  HX23.
    For continuous memory DTCs P0455 and P0457, GO to  HX42.
    For DTC P0460, GO to  HX41.
    For DTCs P0461 through P0463, GO to  HX39.
    For continuous memory DTC P1450, GO to  HX8.
    For DTC P2418, GO to  HX50.
    For continuous memory DTC P2450, GO to  HX56.    		 Unable to duplicate or identify the concern at this time.
    RETURN to the SYMPTOM CHARTS article, Symptom Charts for further direction.
  2. HX2 DTC P0443: CHECK THE PCM OUTPUT TO EVAPCP VALVE 
    • Key in OFF position.
    • EVAPCP Valve connector disconnected.
    • Connect a non-powered test lamp between:
      ( + ) EVAPCP Valve Connector, Harness Side ( - ) EVAPCP Valve Connector, Harness Side
      VPWR - Pin 1 EVAPCP - Pin 2
    • Key ON, engine OFF.
    • Enter output test mode. Refer toOUTPUT TEST MODE (OTM) .
    • Command the outputs ON.
    • Command the outputs OFF.
    • Exit output test mode.
    • Does the test lamp turn on and off when the output(s) is commanded on and off? 
    Yes No
    GO to  HX3. GO to  HX4.
  3. HX3 CHECK THE EVAPCP VALVE SOLENOID RESISTANCE 
    NOTE: The EVAPCP valve resistance reading must be taken with the engine cooled down.
    • Key in OFF position.
    • EVAPCP Valve connector disconnected.
    • Measure the resistance between:
      ( + ) EVAPCP Valve Connector, Component Side ( - ) EVAPCP Valve Connector, Component Side
      EVAPCP - Pin 2 VPWR - Pin 1
    • Is the resistance between 2.5 - 6 ohms? 
    Yes No
    Unable to identify the concern at this time.
    refer to PINPOINT TEST Z .    		 INSTALL a new EVAPCP valve. REFER to EVAPORATIVE EMISSIONS - HYBRID .
    CLEAR the DTCs. REPEAT the self-test.
  4. HX4 CHECK THE VPWR VOLTAGE TO EVAPCP VALVE 
    • Measure the voltage between:
      ( + ) EVAPCP Valve Connector, Harness Side ( - ) Vehicle Battery
      VPWR - Pin 1 Negative terminal
    • Is the voltage greater than 10.5 V? 
    Yes No
    GO to  HX5. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  5. HX5 CHECK THE EVAPCP VALVE CIRCUIT FOR AN OPEN IN THE HARNESS 
    • Key in OFF position.
    • PCM connector disconnected.
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - ) EVAPCP Valve Connector, Harness Side
      EVAPCP - Pin B34 EVAPCP - Pin 2
    • Is the resistance less than 5 ohms? 
    Yes No
    GO to  HX6. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  6. HX6 CHECK THE EVAPCP VALVE CIRCUIT FOR A SHORT TO PWRGND IN THE HARNESS 
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - )
      EVAPCP - Pin B34 Ground
    • Is the resistance greater than 10K ohms? 
    Yes No
    GO to  HX7. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  7. HX7 CHECK THE EVAPCP VALVE CIRCUIT FOR A SHORT TO VOLTAGE IN THE HARNESS 
    • Key ON, engine OFF.
    • Measure the voltage between:
      ( + ) EVAPCP Valve Connector, Harness Side ( - )
      EVAPCP - Pin 2 Ground
    • Is the voltage less than 1 V? 
    Yes No
    GO to  HX57. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  8. HX8 DTC P1450: CHECK FOR VISUAL CAUSES OF EXCESSIVE FUEL TANK VACUUM 
    • Check for kinks or bends in the fuel vapor hoses/tubes (EVAPCP outlet tube and EVAP canister tube).
    • Visually inspect the EVAP canister inlet port, CV solenoid filter, and canister vent hose assembly for contamination or debris.
    • Check the CV solenoid filter for blockage or contamination.
    • Is a concern present? 
    Yes No
    REMOVE any contamination or debris around the fuel vapor hose/tubes and CV solenoid assembly.
    REMOVE kinks or bends in the EVAPCP outlet tube, EVAP canister tube, and canister vent hose assembly.
    CLEAR the DTCs.
    For repair verification, CARRY OUT the evaporative emission leak check monitor repair verification drive cycle.
    REFER toON BOARD DIAGNOSTIC (OBD) DRIVE CYCLE .    		 GO to  HX9.
  9. HX9 CHECK THE FTP SENSOR VOLTAGE WITH THE FUEL FILLER CAP REMOVED 
    • Remove the fuel filler cap.
    • Key ON, engine OFF.
    • Access the PCM and monitor the FTP PID.
    • Is the voltage between 2.4 - 2.8 V? 
    Yes No
    GO to  HX13. GO to  HX10.
  10. HX10 CHECK FOR ANY OTHER DTCS 
    • Key in OFF position.
    • Check for other 3-wire sensor DTCs (KOEO, KOER, or continuous memory) present with the DTC P1450.
    • Are any other DTCs present? 
    Yes No
    DISREGARD the current diagnostic trouble code (DTC) at this time. DIAGNOSE the next DTC. GO toDIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS . GO to  HX11.
  11. HX11 CHECK THE VREF VOLTAGE TO THE FTP SENSOR 
    • FTP Sensor connector disconnected.
    • Key ON, engine OFF.
    • Measure the voltage between:
      ( + ) FTP Sensor Connector, Harness Side ( - ) FTP Sensor Connector, Harness Side
      VREF - Pin 1 SIGRTN - Pin 2
    • Is the voltage between 4 - 6 V? 
    Yes No
    INSTALL a new FTP sensor. REFER to EVAPORATIVE EMISSIONS - HYBRID .
    CLEAR the DTCs.
    For repair verification, CARRY OUT the evaporative emission leak check monitor repair verification drive cycle.
    REFER toON BOARD DIAGNOSTIC (OBD) DRIVE CYCLE .    		 GO to  HX12.
  12. HX12 CHECK THE VREF AND SIGRTN CIRCUIT FOR AN OPEN IN THE HARNESS 
    • Key in OFF position.
    • PCM connector disconnected.
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - ) FTP Sensor Connector, Harness Side
      VREF - Pin B40 VREF - Pin 1
      SIGRTN - Pin B41 SIGRTN - Pin 2
    • Are the resistances less than 5 ohms? 
    Yes No
    GO to  HX57. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  13. HX13 CHECK IF THE ENGINE WILL IDLE 
    • Key ON, engine running.
    • Does the engine stall or cannot maintain idle? 
    Yes No
    GO to  HX14. GO to  HX15.
  14. HX14 CHECK THE EVAP SYSTEM FOR A STUCK OPEN VALVE 
    • Key in OFF position.
    • Disconnect the fuel vapor to intake manifold line at the EVAPCP valve and cap the line at the EVAPCP valve.
    • Key ON, engine running.
    • Does the engine stall or cannot maintain idle? 
    Yes No
    The EVAP system is not the cause of the symptom.
    RETURN to the SYMPTOM CHARTS article, Symptom Charts for further direction.    		 INSTALL a new EVAPCP valve. REFER to EVAPORATIVE EMISSIONS - HYBRID .
    CLEAR the DTCs. REPEAT the self-test.
  15. HX15 CHECK FOR BLOCKAGE IN THE FUEL TANK VENT SYSTEM 
    NOTE: The CV is normally open and venting to the atmosphere.
    • Key ON, engine running.
    • Access the PCM and monitor the EVAPCV, EVMV and FTP PIDs.
    • While monitoring the FTP PID, open the EVAPCP by commanding the EVMV PID to a 100% duty cycle (1,000 mA). Ramp the EVAP canister purge valve open in increments.
    • Does the FTP sensor voltage drop below 2 volts when the EVAPCP valve is commanded fully open? 
    Yes No
    CHECK for blockage in the vapor line to the CV solenoid. CHECK the CV solenoid filter for blockage or contamination. CHECK the carbon canister for blockage. If OK, INSTALL a new CV solenoid. REFER to EVAPORATIVE EMISSIONS - HYBRID .
    CLEAR the DTCs. REPEAT the self-test.    		 GO to  HX16.
  16. HX16 CHECK THE EVAP SYSTEM FOR A VALVE THAT IS STUCK OPEN 
    • Key ON, engine running.
    • Access the PCM and control the EVMV PID.
    • Close the EVAPCP by commanding the EVMV PID to 0 % duty cycle (0 mA).
    • Access the PCM and control the EVAPCV PID.
    • Close the CV solenoid by commanding the EVAPCV PID to ON (100% duty cycle).
    • Does the FTPV PID decrease, the engine RPM change, or the engine stall, as an indication that the EVAPCP valve is stuck open? 
    Yes No
    INSTALL a new EVAPCP valve. REFER to EVAPORATIVE EMISSIONS - HYBRID .
    CLEAR the DTCs. REPEAT the self-test.    		 GO to  HX17.
  17. HX17 EVAPCP VALVE TEST 
    • Key ON, engine running.
    • Access the PCM and control the EVAPCV PID.
    • Close the CV solenoid by commanding the EVAPCV PID to ON (100% duty cycle).
    • Access the PCM and control the EVMV PID.
    • While monitoring the FTP PID, open the EVAPCP by commanding the EVMV PID to a 100% duty cycle (1,000 mA).
    • Does the FTPV PID decrease, engine RPM change, or engine stall as an indication that the EVAPCP is opening? 
    Yes No
    For DTC P1450, CHECK for the FTIV stuck closed. REPAIR as necessary.
    CLEAR the DTCs. REPEAT the self-test.
    For all others, CHECK the EVAP system for leaks,
    GO to  HX42.    		 CHECK for blockages between the fuel tank, the EVAPCP valve, and the engine intake manifold. CHECK for obstructions in the EVAPCP valve diaphragm and ports. If OK, INSTALL a new EVAPCP valve. REFER to EVAPORATIVE EMISSIONS - HYBRID .
    CLEAR the DTCs. REPEAT the self-test.
  18. HX18 DTC P0452: CHECK FOR FTP SENSOR CONNECTOR CONTAMINATION 
    • Key in OFF position.
    • Visually check for liquid fuel contamination of the FTP sensor and electrical connector.
    • Does the FTP sensor and its connector show any signs of fuel contamination? 
    Yes No
    REPAIR as necessary.
    ADJUST the fuel tank overfill.
    CLEAR the DTCs. REPEAT the self-test.    		 GO to  HX19.
  19. HX19 CHECK FOR LOW FTP SENSOR VOLTAGE 
    NOTE: The FTP sensor voltage with no pressure/vacuum on the fuel tank is between 2.4 and 2.8 volts.
    • Key ON, engine OFF.
    • Access the PCM and monitor the FTP PID.
    • Is the voltage less than 0.22 V? 
    Yes No
    GO to  HX20. The concern that produced the DTC P0452 is intermittent.
    refer to PINPOINT TEST Z .
  20. HX20 CHECK THE OPPOSITE INDUCED HIGH FTP SENSOR SIGNAL 
    • Key in OFF position.
    • FTP Sensor connector disconnected.
    • Connect a 5 amp fused jumper wire between the following:
      Point A FTP Sensor Connector, Harness Side Point B FTP Sensor Connector, Harness Side
      VREF - Pin 1 FTP - Pin 3
    • Key ON, engine OFF.
    • Access the PCM and monitor the FTP PID.
    • Is the voltage between 4 - 6 V? 
    Yes No
    INSTALL a new FTP sensor. REFER to EVAPORATIVE EMISSIONS - HYBRID .
    CLEAR the DTCs. REPEAT the self-test.    		 GO to  HX21.
  21. HX21 CHECK THE VREF VOLTAGE TO THE FTP SENSOR 
    • Key in OFF position.
    • Remove the jumper wire(s).
    • Key ON, engine OFF.
    • Measure the voltage between:
      ( + ) FTP Sensor Connector, Harness Side ( - ) FTP Sensor Connector, Harness Side
      VREF - Pin 1 SIGRTN - Pin 2
    • Is the voltage between 4 - 6 V? 
    Yes No
    GO to  HX22. refer to PINPOINT TEST C .
  22. HX22 CHECK THE FTP CIRCUIT(S) FOR A SHORT TO SIGRTN OR GND IN THE HARNESS 
    • Key in OFF position.
    • PCM connector disconnected.
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - ) PCM Connector, Harness Side
      FTP - Pin B9 SIGRTN - Pin B41
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - ) Vehicle Battery
      FTP - Pin B9 Negative terminal
    • Is the resistance greater than 10K ohms? 
    Yes No
    GO to  HX57. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  23. HX23 DTC P0453: CHECK FOR A HIGH FTP SENSOR VOLTAGE 
    NOTE: The FTP sensor voltage with no pressure/vacuum on the fuel tank is between 2.4 and 2.8 volts.
    • Key ON, engine OFF.
    • Access the PCM and monitor the FTP PID.
    • Is the voltage greater than 4.5 V? 
    Yes No
    GO to  HX24. The concern that produced the DTC P0453 is intermittent.
    refer to PINPOINT TEST Z .
  24. HX24 CHECK THE FTP CIRCUIT FOR A SHORT TO VOLTAGE 
    • Key in OFF position.
    • FTP Sensor connector disconnected.
    • Key ON, engine OFF.
    • Measure the voltage between:
      ( + ) FTP Sensor Connector, Harness Side ( - ) Vehicle Battery
      FTP - Pin 3 Negative terminal
    • Is the voltage greater than 10.5 V? 
    Yes No
    GO to  HX25. GO to  HX26.
  25. HX25 CHECK THE FTP CIRCUIT FOR A SHORT TO VPWR IN THE HARNESS 
    • Key in OFF position.
    • PCM connector disconnected.
    • Key ON, engine OFF.
    • Measure the voltage between:
      ( + ) PCM Connector, Harness Side ( - ) Vehicle Battery
      FTP - Pin B9 Negative terminal
    • Is the voltage greater than 10.5 V? 
    Yes No
    REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test. GO to  HX57.
  26. HX26 INSTALL A JUMPER BETWEEN THE FTP SIGNAL AND THE SIGRTN CIRCUITS 
    • Key in OFF position.
    • Connect a 5 amp fused jumper wire between the following:
      Point A FTP Sensor Connector, Harness Side Point B FTP Sensor Connector, Harness Side
      FTP - Pin 3 SIGRTN - Pin 2
    • Key ON, engine OFF.
    • Access the PCM and monitor the FTP PID.
    • Is the voltage between 4 - 6 V? 
    Yes No
    GO to  HX32. GO to  HX27.
  27. HX27 CHECK THE OPPOSITE INDUCED LOW FTP SIGNAL 
    • Access the PCM and monitor the FTP PID.
    • Is the voltage less than 0.1 V? 
    Yes No
    GO to  HX28. GO to  HX30.
  28. HX28 CHECK THE VOLTAGE BETWEEN THE VREF AND SIGRTN CIRCUITS AT THE FTP SENSOR VEHICLE HARNESS CONNECTOR 
    • Key in OFF position.
    • Remove the jumper wire(s).
    • Key ON, engine OFF.
    • Measure the voltage between:
      ( + ) FTP Sensor Connector, Harness Side ( - ) FTP Sensor Connector, Harness Side
      VREF - Pin 1 SIGRTN - Pin 2
    • Is the voltage between 4 - 6 V? 
    Yes No
    GO to  HX29. refer to PINPOINT TEST C .
  29. HX29 CHECK THE FTP CIRCUIT FOR A SHORT TO VREF 
    • Key in OFF position.
    • PCM connector disconnected.
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - ) PCM Connector, Harness Side
      VREF - Pin B40 FTP - Pin B9
    • Is the resistance greater than 10K ohms? 
    Yes No
    INSTALL a new FTP sensor. REFER to EVAPORATIVE EMISSIONS - HYBRID .
    CLEAR the DTCs. REPEAT the self-test.    		 REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  30. HX30 CHECK THE FTP CIRCUIT FOR AN OPEN IN THE HARNESS 
    • Key in OFF position.
    • Remove the jumper wire(s).
    • PCM connector disconnected.
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - ) FTP Sensor Connector, Harness Side
      FTP - Pin B9 FTP - Pin 3
    • Is the resistance less than 5 ohms? 
    Yes No
    GO to  HX31. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  31. HX31 CHECK THE SIGRTN CIRCUIT FOR AN OPEN IN THE HARNESS 
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - ) FTP Sensor Connector, Harness Side
      SIGRTN - Pin B41 SIGRTN - Pin 2
    • Is the resistance less than 5 ohms? 
    Yes No
    GO to  HX32. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  32. HX32 CHECK THE FTP CIRCUIT FOR A SHORT TO VREF 
    • Key in OFF position.
    • Remove the jumper wire(s).
    • PCM connector disconnected.
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - ) PCM Connector, Harness Side
      FTP - Pin B9 VREF - Pin B40
    • Is the resistance greater than 10K ohms? 
    Yes No
    GO to  HX57. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  33. HX33 DTC P0446: CHECK THE PCM OUTPUT TO THE CV SOLENOID 
    • Key in OFF position.
    • CV Solenoid connector disconnected.
    • Connect a non-powered test lamp between:
      ( + ) CV Solenoid Connector, Harness Side ( - ) CV Solenoid Connector, Harness Side
      CANV - Pin 2 VPWR - Pin 1
    • Key ON, engine OFF.
    • Enter output test mode. Refer toOUTPUT TEST MODE (OTM) .
    • Command the outputs ON.
    • Command the outputs OFF.
    • Exit output test mode.
    • Does the test lamp turn on and off when the output(s) is commanded on and off? 
    Yes No
    GO to  HX34. GO to  HX35.
  34. HX34 CHECK THE CV SOLENOID RESISTANCE 
    • Key in OFF position.
    • Measure the resistance between:
      ( + ) CV Solenoid Connector, Component Side ( - ) CV Solenoid Connector, Component Side
      VPWR - Pin 1 CANV - Pin 2
    • Is the resistance between 48 - 65 ohms? 
    Yes No
    Unable to identify the concern at this time.
    refer to PINPOINT TEST Z .    		 INSTALL a new CV solenoid. REFER to EVAPORATIVE EMISSIONS - HYBRID .
    CLEAR the DTCs. REPEAT the self-test.
  35. HX35 CHECK THE VPWR VOLTAGE TO CV SOLENOID 
    • Measure the voltage between:
      ( + ) CV Solenoid Connector, Harness Side ( - )
      VPWR - Pin 1 Ground
    • Is the voltage greater than 10.5 V? 
    Yes No
    GO to  HX36. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  36. HX36 CHECK THE CANV CIRCUIT FOR AN OPEN IN THE HARNESS 
    • Key in OFF position.
    • PCM connector disconnected.
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - ) CV Solenoid Connector, Harness Side
      CANV - Pin B13 CANV - Pin 2
    • Is the resistance less than 5 ohms? 
    Yes No
    GO to  HX37. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  37. HX37 CHECK THE CANV CIRCUIT FOR A SHORT TO PWRGND IN THE HARNESS 
    • Measure the resistance between:
      ( + ) CV Solenoid Connector, Harness Side ( - ) Vehicle Battery
      CANV - Pin 2 Negative terminal
    • Is the resistance greater than 10K ohms? 
    Yes No
    GO to  HX38. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  38. HX38 CHECK THE CANV CIRCUIT FOR A SHORT TO VOLTAGE IN THE HARNESS 
    • Key ON, engine OFF.
    • Measure the voltage between:
      ( + ) CV Solenoid Connector, Harness Side ( - )
      CANV - Pin 2 Ground
    • Is the voltage less than 1 V? 
    Yes No
    GO to  HX57. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  39. HX39 DTCS P0461, P0462 AND P0463: CHECK THE INSTRUMENT CLUSTER MODULE FOR DTCS 
    • Key ON, engine OFF.
    • Carry out the instrument cluster self-test.
    • Are any DTCs present? 
    Yes No
    REFER to INSTRUMENT CLUSTER to continue diagnosis. GO to  HX40.
  40. HX40 CHECK THE FLI PID 
    • Access the PCM and monitor the FLI PID.
    • Does the FLI PID match the fuel gauge? 
    Yes No
    GO to  HX41. GO to  HX57.
  41. HX41 DTC P0460: CHECK FOR FUEL TANK FLOAT LEVEL RESPONSE 
    • Key ON, engine OFF.
    • Access the PCM and monitor the FLI PID.
    • Key in OFF position.
    • If the fuel level is less than 1/4 (25% on FLI), add approximately 1/4 tank of fuel.
    • If the fuel level is greater than 3/4 (75% on FLI), drain approximately 1/4 tank of fuel.
    • Key ON, engine OFF.
    • Access the PCM and monitor the FLI PID.
    • Does the FLI PID indicate a movement upward or downward as fuel is either added or drained? 
    Yes No
    Unable to duplicate or identify the concern at this time.
    refer to PINPOINT TEST Z .    		 REFER to INSTRUMENT CLUSTER to diagnose the incorrect fuel gauge indication symptom.
  42. HX42 DTCS P0455 OR P0457: CHECK THE FUEL FILLER CAP 
    NOTE: Many EVAP leaks are caused by a loose or damaged fuel filler cap. If the fuel filler cap is suspect during visual inspection, do not disturb the fuel filler cap until the repair verification method is complete. If the repair verification method fails, reposition or install a new fuel filler cap and repeat the test. This action isolates the fuel filler cap from the rest of the EVAP system as a potential concern.
    • Visually inspect the fuel filler cap without initially disturbing it.
    • Check for a missing or loose fuel filler cap.
    • Check the fuel filler cap for damage.
    • Is a concern present with the proper installation of the fuel filler cap? 
    Yes No
    For repair verification, CARRY OUT the Smoke Machine PHASE 1 - Leak Verification Pressure Test.
    CONNECT or INSTALL a new fuel filler cap.
    GO to  HX47.    		 GO to  HX43.
  43. HX43 CHECK THE OPERATION OF THE FUEL GAUGE 
    NOTE: A fuel gauge that always indicates a fuel level less than a 1/2 tank or always a full tank, may be caused by an FLI concern.
    • Check the operation of the fuel gauge.
    • Is the fuel gauge functioning properly? 
    Yes No
    GO to  HX44. CHECK the functionality of the FLI circuit. REFER to INSTRUMENT CLUSTER to diagnose the fuel level indicator.
  44. HX44 EVAPORATIVE EMISSION SYSTEM VISUAL INSPECTION 
    • Key in OFF position.
    • Visually inspect for:
      • EVAP system lines/hoses (check for proper connections, damage or blockage)
      • loose fuel vapor hose/tube connections to the EVAP system components
      • blocked vacuum hose between the EVAPCP valve and the engine intake manifold
      • damaged fuel tank or fuel filler pipe
    • Are any concerns present during the visual inspection? 
    Yes No
    REPAIR as necessary.
    For repair verification, CARRY OUT the Smoke Machine PHASE 1 - Leak Verification Pressure Test.
    GO to  HX47.    		 GO to  HX45.
  45. HX45 CHECK THE FTP SENSOR VOLTAGE WITH THE FUEL FILLER CAP REMOVED 
    • Remove the fuel filler cap.
    • Key ON, engine OFF.
    • Access the PCM and monitor the FTP PID.
    • Is the voltage between 2.4 - 2.8 V? 
    Yes No
    CONNECT the fuel filler cap.
    GO to  HX46.    		 INSTALL a new FTP sensor. REFER to EVAPORATIVE EMISSIONS - HYBRID . REPEAT the test and VERIFY the results.
    For repair verification, CARRY OUT the Smoke Machine PHASE 1 - Leak Verification Pressure Test.
    GO to  HX47.
  46. HX46 EVAPCP VALVE TEST 
    NOTE: Access the fuel tank isolation valve and verify that it is not stuck closed before continuing.
    • Key ON, engine running.
    • Access the PCM and monitor the EVAPCV, FTP and EVMV PIDs.
    • Access the PCM and control the EVAPCV PID.
    • Close the EVAPCV by commanding the EVAPCV PID to ON (100% duty cycle).
    • While monitoring the FTP PID, open the EVAPCP by commanding the EVMV PID to a 100% duty cycle (1,000 mA).
    • Does the FTPV PID decrease, engine RPM change, or engine stall as an indication that the EVAPCP is opening? 
    Yes No
    GO to  HX47. INSTALL a new EVAPCP valve. REFER to EVAPORATIVE EMISSIONS - HYBRID . REPEAT the test and VERIFY the results.
    For repair verification, CARRY OUT the Smoke Machine PHASE 1 - Leak Verification Pressure Test.
    GO to  HX47.
  47. HX47 DTCS P0442 OR P0456: HOOK UP THE SMOKE MACHINE 
    CAUTION: Removing the Schrader valve from the test port will permanently damage the valve.
    • Key in OFF position.
    • Disconnect the fuel vapor to intake manifold line at the EVAPCP valve and cap the line at the EVAPCP valve.
    • Connect the smoke machine power cables to the vehicle battery. Check to see that the smoke machine power indicator lamp is on, indicating a good battery contact.
    • Locate the evaporative emissions test port and remove the green cap. The cap is located on the EVAPCP valve.
    • Install the evaporative emissions port adapter (provided with the smoke machine) to the test port.
    • Is the smoke machine hook up complete? 
    Yes No
    For leak detection, GO to  HX48.
    For leak repair verification, GO to  HX49.    		 REFER to the smoke machine operator manual for additional instructions and for helpful tips.
  48. HX48 CARRY OUT SMOKE MACHINE PHASE 2 - LEAK DETECTION SMOKE TEST 
    NOTE: If the leak is not detected from the top, check the EVAP system for leaks from under the vehicle.
    • Check the EVAP hoses, EVAPCP, EVAPCV, carbon canister, fuel tank, the components around the fuel tank area, and at the fuel filler cap.
    • Wiggle the components and connections to simulate road bumps while looking for signs of leaking smoke.

    If the leak is in the fuel filler neck between the check valve and the fuel filler cap, smoke under pressure may not reach the leak. If leaking smoke is not found, a thorough visual inspection of the fuel filler neck and fuel filler cap should be carried out.

    • Position the control lever located on the smoke machine to SMOKE.
    • Remove the fuel filler cap.
    • Connect the smoke supply hose (black hose) nozzle tip into the evaporative emission test port.
    • Key ON, engine OFF.
    • Access the PCM and control the EVAPCV PID.
    • Close the CV solenoid by commanding the EVAPCV PID to ON (100% duty cycle). The CV solenoid reopens after 9 minutes of continuous operation.
    • Press the remote starter button on the smoke machine. Smoke will be introduced into the EVAP system. If smoke does not exit the fuel filler neck after the system is pressurized, command the EVAPCV PID open to allow air to purge the CV solenoid. Once smoke is seen at the CV solenoid, command the EVAPCV PID close.
      • Secure the fuel filler cap once smoke is observed exiting the fuel tank neck area.
      • Continue to introduce smoke into the system for 60 seconds to obtain pressure.
      • Press and release the remote starter button in intervals of approximately 15 seconds on and 15 seconds off while checking for exiting smoke.
      • Use the halogen spotlight provided with the smoke machine to follow the EVAP system path and look for smoke exiting at the source of the leak.
    • Is the source of the EVAP leak located? 
    Yes No
    REPAIR as necessary. CONNECT all the disconnected components.
    For repair verification, CARRY OUT the Smoke Machine PHASE 1 - Leak Verification Pressure Test.
    GO to  HX49.    		 Test passed. CONNECT all the disconnected components.
    CARRY OUT the Smoke Machine PHASE 1 - Leak Verification Pressure Test.
    GO to  HX49.
  49. HX49 CARRY OUT SMOKE MACHINE PHASE 1 - LEAK VERIFICATION PRESSURE TEST 
    • Position the control lever located on the smoke machine to METER.
    • Calibrate the smoke machine flowmeter using the 0.020 standard as follows:
      • Insert the air supply hose (transparent hose) nozzle tip into the 0.020 EVAP system standard located on the front of the smoke machine.
      • Press the remote starter button on the smoke machine. Observe the position of the flowmeter indicator ball.
      • Position the flowmeter red pointer flag so that it aligns with the measurement of the indicator ball.
      • Release the button and remove the air supply hose nozzle tip from the EVAP system standard.
    • Connect the air supply hose (transparent hose) nozzle tip into the evaporative emission test port adapter.
    • Key ON, engine OFF.
    • Access the PCM and control the EVAPCV PID.
    • Close the EVAPCV by commanding the EVAPCV PID to ON (100% duty cycle).
    • Press the remote starter button on the smoke machine. Notice that the ball in the flowmeter is all the way at the top. This indicates the system is being pressurized.
    • Continue to press the remote starter button until the ball stops descending. Once the ball stops descending, observe if it is above or below the red pointer flag. If the measurement is below the indicator flag, the system has passed the pressure test. If the measurement is above the indicator flag, the EVAP system has an unacceptable leak.
    • Does the EVAP system pass the smoke machine leak verification pressure test? 
    Yes No
    The test passed and no concerns are present.
    CLEAR the DTCs. REPEAT the self-test.    		 GO to  HX48.
  50. HX50 DTC P2418: CHECK THE PCM OUTPUT TO FTIV 
    • Key in OFF position.
    • FTIV Solenoid connector disconnected.
    • Connect a non-powered test lamp between:
      ( + ) FTIV Solenoid Connector, Harness Side ( - ) FTIV Solenoid Connector, Harness Side
      VPWR - Pin 1 FTIV - Pin 2
    • Key ON, engine OFF.
    • Enter output test mode. Refer toOUTPUT TEST MODE (OTM) .
    • Command the outputs ON.
    • Command the outputs OFF.
    • Exit output test mode.
    • Does the test lamp turn on and off when the output(s) is commanded on and off? 
    Yes No
    GO to  HX51. GO to  HX52.
  51. HX51 CHECK THE FTIV SOLENOID RESISTANCE 
    • Key in OFF position.
    • Measure the resistance between:
      ( + ) FTIV Solenoid Connector, Component Side ( - ) FTIV Solenoid Connector, Component Side
      FTIV - Pin 2 VPWR - Pin 1
    • Is the resistance between 17 - 21 ohms? 
    Yes No
    Unable to identify the concern at this time.
    refer to PINPOINT TEST Z .    		 INSTALL a new FTIV solenoid. REFER to EVAPORATIVE EMISSIONS - HYBRID .
    CLEAR the DTCs. REPEAT the self-test.
  52. HX52 CHECK THE VPWR VOLTAGE TO FUEL TANK ISOLATION VALVE 
    • Measure the voltage between:
      ( + ) FTIV Solenoid Connector, Harness Side ( - )
      VPWR - Pin 1 Ground
    • Is the voltage greater than 10.5 V? 
    Yes No
    GO to  HX53. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  53. HX53 CHECK THE FTIV CIRCUIT FOR AN OPEN IN THE HARNESS 
    • Key in OFF position.
    • PCM connector disconnected.
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - ) FTIV Solenoid Connector, Harness Side
      FTIV - Pin B29 FTIV - Pin 2
    • Is the resistance less than 5 ohms? 
    Yes No
    GO to  HX54. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  54. HX54 CHECK THE FTIV CIRCUIT FOR A SHORT TO PWRGND IN THE HARNESS 
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - )
      FTIV - Pin B29 Ground
    • Is the resistance greater than 10K ohms? 
    Yes No
    GO to  HX55. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  55. HX55 CHECK THE FTIV CIRCUIT FOR A SHORT TO VOLTAGE IN THE HARNESS 
    • Key ON, engine OFF.
    • Measure the voltage between:
      ( + ) FTIV Solenoid Connector, Harness Side ( - )
      FTIV - Pin 2 Ground
    • Is the voltage less than 1 V? 
    Yes No
    GO to  HX57. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  56. HX56 CONTINUOUS MEMORY DTC P2450: CHECK FOR A STUCK OPEN FTIV 
    • Disconnect the FTIV and inspect for damaged or pushed out pins, corrosion, and loose wires.
    • Check for kinks or bends in the fuel vapor hoses/tubes (FTIV to the fuel tank tube).
    • Are there any concerns with the wiring or the FTIV connection? 
    Yes No
    REPAIR as necessary.
    CARRY OUT an evaporative emission leak check monitor repair verification drive cycle. REFER toON BOARD DIAGNOSTIC (OBD) DRIVE CYCLE .    		 INSTALL a new FTIV solenoid. CARRY OUT an evaporative emission leak check monitor repair verification drive cycle. REFER toON BOARD DIAGNOSTIC (OBD) DRIVE CYCLE .
  57. HX57 CHECK FOR CORRECT PCM OPERATION 
    • Disconnect all the PCM connectors.
    • Visually inspect for:
      • pushed out pins
      • corrosion
    • Connect all the PCM connectors and make sure they seat correctly.
    • Carry out the PCM self-test and verify the concern is still present.
    • Is the concern still present? 
    Yes No
    INSTALL a new PCM. REFER toFLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) . The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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