SFI SYSTEM(w/ Canister Pump Module), Diagnostic DTC:P04419C

DTC SUMMARY

DESCRIPTION

The description can be found in EVAP (Evaporative Emission) System.

Click here

1. Purge Flow Monitor

   The purge flow monitor consists of the 2 monitors. The 1st monitor is conducted every time and the 2nd monitor is activated if necessary.

   
   

   • The 1st monitor

     While the engine is running and the purge VSV (Vacuum Switching Valve) is on (open), the ECM monitors the purge flow by measuring the EVAP pressure change. If negative pressure is not created, the ECM begins the 2nd monitor.

   • The 2nd monitor

     The vent valve is turned on (closed) and the EVAP pressure is then measured. If the variation in the pressure is less than 0.154 kPa(gauge) [0.022 psi(gauge)], the ECM interprets this as the purge VSV or No. 1 check valve being stuck closed, illuminates the MIL and store DTC (2 trip detection logic).

   
   

   • Atmospheric pressure check:

   
   

   • In order to ensure reliable malfunction detection, the variation between the atmospheric pressures, before and after of the purge flow monitor, is measured by the ECM.

   

   *1	Canister	*2	to Intake Manifold
   *3	ECM	*4	Soak Timer
   *5	Purge VSV (On)	*6	Fuel Tank Cap
   *7	Canister Filter	*8	Fuel Tank
   *9	Leak Detection Pump (Off)	*10	Canister Pressure Sensor
   *11	Reference Orifice (0.02 inches)	*12	Vent Valve (Off)
   *13	Canister Pump Module	*14	No. 1 Check Valve
   *a	EVAP Purge Flow	-	-

MONITOR DESCRIPTION

• PURGE FLOW MONITOR

  The purge flow monitor consists of 2 monitors. The 1st monitor is conducted every time and the 2nd monitor is activated if necessary.

  
  
  

  • The 1st monitor

    While the engine is running and the purge VSV is on (open), the ECM monitors the purge flow by measuring the EVAP pressure change. If negative pressure is not created, the ECM begins the 2nd monitor.

  • The 2nd monitor

    The vent valve is turned on (closed) and the EVAP pressure is then measured. If the variation in the pressure is less than 0.154 kPa(gauge) [0.022 psi(gauge)], the ECM interprets this as the purge VSV or No. 1 check valve being stuck closed, illuminates the MIL and store DTC (2 trip detection logic).

Atmospheric pressure check:

In order to ensure reliable malfunction detection, the variation between the atmospheric pressures, before and after conduction of the purge flow monitor, is measured by the ECM.

MONITOR STRATEGY

CONFIRMATION DRIVING PATTERN

• 
  

  1. Connect the GTS to the DLC3.

  2. Turn the engine switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the engine switch off and wait for at least 30 seconds.

  5. Turn the engine switch on (IG) and turn the GTS on.

  6. Start the engine and wait 15 minutes or more.

  7. Enter the following menus: Powertrain / Engine / Trouble Codes.

  8. Read the pending DTCs.

     Tech Tips

     
     

     • If a pending DTC is output, the system is malfunctioning.

     • If a pending DTC is not output, perform the following procedure.

  9. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  10. Input the DTC: P04419C.

  11. Check the DTC judgment result.

      GTS Display	Description
      NORMAL	DTC judgment completed System normal
      ABNORMAL	DTC judgment completed System abnormal
      INCOMPLETE	DTC judgment not completed You should perform driving pattern after confirming DTC enabling conditions
      N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

      Tech Tips

      
      

      • If the judgment result shows NORMAL, the system is normal.

      • If the judgment result shows ABNORMAL, the system has a malfunction.

WIRING DIAGRAM

Refer to DTC P045011.

Click here

CAUTION / NOTICE / HINT

PROCEDURE

1. PERFORM ACTIVE TEST USING GTS (ACTIVATE THE EVAP PURGE VSV)

   

   *1	Purge VSV
   *2	Fuel Vapor Feed Hose (to Canister)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the engine switch on (IG).

   3. Turn the GTS on.

   4. Enter the following menus: Powertrain / Engine / Active Test / Activate the EVAP Purge VSV.

      
      Powertrain > Engine > Active Test

      Tester Display
      Activate the EVAP Purge VSV

   5. Disconnect the fuel vapor feed hose (connected to the canister) from the purge VSV.

   6. Start the engine.

   7. Using the GTS, turn on the purge VSV (Activate the EVAP Purge VSV: ON).

   8. Use your finger to confirm that the purge VSV has suction.

      Result
      Test Result Suspected Trouble Area Proceed to Suction applied Problems with EVAP hose between canister and purge VSV Canister (charcoal filter inside canister) clogged A No suction Purge VSV stuck closed No. 1 check valve stuck closed Problems with EVAP hose between purge VSV and intake manifold ECM B

   
   

   B

   INSPECT EVAP HOSE (PURGE VSV - INTAKE MANIFOLD) Click here

   A

2. INSPECT EVAP HOSE (PURGE VSV - CANISTER)

   
   

   1. Check for blockages in the EVAP purge line between the purge VSV and canister.

      OK
      No blockages in the EVAP purge line between the purge VSV and canister.

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE EVAP PURGE LINE (PURGE VSV - CANISTER) Click here

   OK

3. INSPECT CANISTER (CHARCOAL FILTER INSIDE CANISTER)

   
   

   1. Check for filter blockage in the canister.

      Click here

      OK
      No blockages in the canister.

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE CANISTER Click here

   OK

4. REPLACE CANISTER PUMP MODULE

   
   

   1. Replace the canister pump module.

      Click here

      Note

      
      

      • When replacing the canister pump module, check the canister pump module interior, canister interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. If liquids are present in the canister interior, replace the canister, and canister pump module together.

      • Check for filter blockage in the canister. If the charcoal filter inside the canister is clogged, replace the canister and canister pump module together.

      • Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter.

      

      *1	Fuel Tank Vent Hose	*2	Air Inlet Port
      *3	Vent Hose	*4	Fuel Tank
      *5	Canister Pump Module	*6	Canister
      *7	Canister Filter	-	-
      *a	Inspection Area (check for disconnection and/or cracks)	-	-

      Result
      Proceed to NEXT

   
   

   NEXT

   GO TO STEP 21 Click here

5. REPLACE CANISTER

   
   

   1. Replace the canister.

      Click here

      Note

      
      

      • When replacing the canister, check the canister pump module interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose.

      • Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter.

      

      *1	Fuel Tank Vent Hose	*2	Air Inlet Port
      *3	Vent Hose	*4	Fuel Tank
      *5	Canister Pump Module	*6	Canister
      *7	Canister Filter	-	-
      *a	Inspection Area (check for disconnection and/or cracks)	-	-

      Result
      Proceed to NEXT

   
   

   NEXT

   GO TO STEP 21 Click here

6. REPAIR OR REPLACE EVAP PURGE LINE (PURGE VSV - CANISTER)

   Result
   Proceed to NEXT

   
   

   NEXT

   GO TO STEP 21 Click here

7. INSPECT EVAP HOSE (PURGE VSV - INTAKE MANIFOLD)

   

   *1	Purge VSV
   *2	Fuel Vapor Feed Hose (to intake manifold)

   
   

   1. Disconnect the fuel vapor feed hose (connected to the intake manifold) from the purge VSV.

   2. Start the engine.

   3. Use your finger to confirm that the fuel vapor feed hose has suction.

      Result
      Test Result Suspected Trouble Area Proceed to Suction applied EVAP hose between purge VSV and intake manifold normal Purge VSV Purge VSV power source Wire harness or connector between purge VSV and ECM ECM A No suction No. 1 check valve Intake manifold port EVAP hose between purge VSV and intake manifold B

   
   

   B

   INSPECT NO. 1 CHECK VALVE Click here

   A

8. INSPECT PURGE VSV

   

   *1

   Purge VSV

   
   

   1. Remove the purge VSV.

   2. Apply battery voltage to the terminals of the purge VSV.

   3. Confirm that air flows from port E to port F.

      Result
      Test Result Condition Suspected Trouble Area Proceed to Air flows Battery voltage is applied to purge VSV terminals Purge VSV normal Purge VSV power source Wire harness or connector between purge VSV and ECM ECM A No air flow Battery voltage is applied to purge VSV terminals Purge VSV B

   
   

   B

   REPLACE PURGE VSV Click here

   A

9. CHECK TERMINAL VOLTAGE (POWER SOURCE OF PURGE VSV)

   

   *a	Front view of wire harness connector (to Purge VSV)

   
   

   1. Disconnect the purge VSV connector.

   2. Turn the engine switch on (IG).

   3. Measure the voltage according to the value(s) in the table below.

      Result
      Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to F87-1 - Body ground Engine switch on (IG) 11 to 14 V Purge VSV power source normal Wire harness or connector between purge VSV and ECM A Other than result above Wire harness or connectors between purge VSV and battery B

   
   

   B

   CHECK HARNESS AND CONNECTOR (SEMICONDUCTOR PWR INTEGRATION ECU - PURGE VSV) Click here

   A

10. CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)

    
    

    1. Disconnect the ECM connector.

    2. Disconnect the purge VSV connector.

    3. Measure the resistance according to the value(s) in the table below.

       Standard Resistance
       Tester Connection Condition Specified Condition F87-2 - F78-70 (PRG) Always Below 1 Ω F87-2 or F78-70 (PRG) - Body ground and other terminals Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    NG

    GO TO STEP 14 Click here

    OK

11. REPLACE ECM

    
    

    1. Replace the ECM.

       Click here

       Result
       Proceed to NEXT

    
    

    NEXT

    GO TO STEP 21 Click here

12. CHECK HARNESS AND CONNECTOR (SEMICONDUCTOR PWR INTEGRATION ECU - PURGE VSV)

    
    

    1. Disconnect the semiconductor pwr integration ECU connector.

    2. Disconnect the purge VSV connector.

    3. Measure the resistance according to the value(s) in the table below.

       Standard Resistance
       Tester Connection Condition Specified Condition 2G-1 - F87-1 Always Below 1 Ω 2G-1 or F87-1 - Body ground and other terminals Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

13. REPLACE SEMICONDUCTOR PWR INTEGRATION ECU

    
    

    1. Replace the semiconductor pwr integration ECU.

       Click here

       Result
       Proceed to NEXT

    
    

    NEXT

    GO TO STEP 21 Click here

14. REPAIR OR REPLACE HARNESS OR CONNECTOR

    Result
    Proceed to NEXT

    
    

    NEXT

    GO TO STEP 21 Click here

15. REPLACE PURGE VSV

    
    

    1. Replace the purge VSV.

       Click here

       Result
       Proceed to NEXT

    
    

    NEXT

    GO TO STEP 21 Click here

16. INSPECT NO. 1 CHECK VALVE

    
    

    1. Inspect the No. 1 check valve.

       Click here

       Result
       Proceed to OK NG

    
    

    NG

    REPLACE NO. 1 CHECK VALVE Click here

    OK

17. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

    
    

    1. Stop the engine.

    2. Disconnect the EVAP hose from the intake manifold.

    3. Start the engine.

    4. Use your finger to confirm that the port of the intake manifold has suction.

       Result
       Tester Connection Suspected Trouble Area Proceed to Suction applied EVAP hose between intake manifold and purge VSV A No suction Intake manifold (upper intake manifold) B

    
    

    B

    INSPECT INTAKE MANIFOLD (EVAP PURGE PORT) Click here

    A

18. REPAIR OR REPLACE EVAP PURGE LINE (INTAKE MANIFOLD - PURGE VSV)

    Result
    Proceed to NEXT

    
    

    NEXT

    GO TO STEP 21 Click here

19. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

    
    

    1. Check that the EVAP purge port of the intake manifold is not clogged. If necessary, replace the intake manifold.

       Click here

       Result
       Proceed to NEXT

    
    

    NEXT

    GO TO STEP 21 Click here

20. REPLACE NO. 1 CHECK VALVE

    
    

    1. Replace the No. 1 check valve.

       Click here

       Result
       Proceed to NEXT

    
    

    NEXT

21. CHECK WHETHER DTC OUTPUT RECURS (DTC P04419C)

    
    

    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.

       
       Powertrain > Engine > Clear DTCs

    5. Turn the engine switch off and wait for at least 30 seconds.

    6. Start the engine.

    7. Turn the GTS on.

    8. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

    9. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

       
       Powertrain > Engine > Utility

       Tester Display
       All Readiness

    10. Input the DTC: P04419C.

    11. Check the DTC judgment result.

        GTS Display	Description
        NORMAL	DTC judgment completed System normal
        ABNORMAL	DTC judgment completed System abnormal
        INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
        N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

        Result
        Proceed to NEXT

    
    

    NEXT

    END