SFI SYSTEM(w/ Canister Pump Module), Diagnostic DTC:P143E9C, P143F9C

DTC Code DTC Name
P143E9C Evaporative Emission System Incorrect Purge Flow Bank1 Low/Insufficient Flow
P143F9C Evaporative Emission System Incorrect Purge Flow Bank2 Low/Insufficient Flow

DESCRIPTION

To reduce hydrocarbon (HC) emissions, evaporated fuel from the fuel tank is routed through a charcoal canister to the intake manifold for combustion in the cylinders.

To route the evaporated fuel evenly into each bank, the canister purge line is divided into 2 lines from the purge VSV, which are connected downstream of the throttle valve of each bank.

B006BV3C01
*1 Canister *2 Trap Canister
*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 to Intake Manifold
*15 No. 1 Check Valve (Bank 1) *16 No. 1 Check Valve (Bank 2)
*17 No. 2 Turbo Pressure Sensor (Bank 1) *18 No. 2 Turbo Pressure Sensor (Bank 2)
*a EVAP Purge Flow - -
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P143E9C Evaporative Emission System Incorrect Purge Flow Bank1 Low/Insufficient Flow

Both of the following conditions (a) and (b) are met for 10 seconds or more (2 trip detection logic):

(a) The purge VSV operation duty signal is 18.5 to 45%.

(b) The amplitude of the No. 2 turbo pressure sensor (bank 1) output voltage is at the threshold or lower.

  • No. 1 check valve (bank 1)

  • Purge line

  • Open or short in No. 2 turbo pressure sensor (bank 1) circuit

  • No. 2 turbo pressure sensor (bank 1)

  • Purge VSV

  • ECM

 Comes on DTC stored SAE: P0441
P143F9C Evaporative Emission System Incorrect Purge Flow Bank2 Low/Insufficient Flow

Both of the following conditions (a) and (b) are met for 10 seconds or more (2 trip detection logic):

(a) The purge VSV operation duty signal is 18.5 to 45%.

(b) The amplitude of the No. 2 turbo pressure sensor (bank 2) output voltage is at the threshold or lower.

  • No. 1 check valve (bank 2)

  • Purge line

  • Open or short in No. 2 turbo pressure sensor (bank 2) circuit

  • No. 2 turbo pressure sensor (bank 2)

  • Purge VSV

  • ECM

 Comes on DTC stored SAE: P0441

MONITOR DESCRIPTION

The ECM monitors the No. 2 turbo pressure sensor output voltage during purge VSV operation.

When the amplitude of the No. 2 turbo pressure sensor output voltage is at the threshold or lower during purge VSV operation, a malfunction in the canister purge line is judged, and the ECM illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Required Sensors/Components (Main) No. 2 turbo pressure sensor
Required Sensors/Components (Related)

Mass air flow meter sub-assembly

Purge VSV

Engine coolant temperature sensor
Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN

B006AC3E19

  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 warm it up until the engine coolant temperature is 75°C (167°F) or higher [A].

    Tech Tips

    The A/C switch and all accessory switches should be off.

  7. Idle the engine for 15 minutes or more [B].

    Tech Tips

    Check the EVAP (Purge) VSV item in the Data List. When the value of this item is between 18.5 and 45%, the judgment will be performed.

  8. Enter the following menus: Powertrain / Engine / Trouble Codes [C].

  9. 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.

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

  11. Input the DTC: P143E9C or P143F9C.

  12. 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

    Tech Tips


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

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

    • If the judgment result shows INCOMPLETE, perform steps [D] and [E].

  13. Drive the vehicle at a constant speed between 40 and 60 km/h (25 and 37 mph) for 10 minutes or more [D].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

  14. Enter the following menus: Powertrain / Engine / Trouble Codes [E].

  15. 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.

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

  17. Input the DTC: P143E9C or P143F9C.

  18. 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

    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 P24D511.

Click here

CAUTION / NOTICE / HINT

Tech Tips


  • Bank 1 refers to the bank that includes the No. 1 cylinder*.

    *: The No. 1 cylinder is the cylinder which is farthest from the transmission.

  • Bank 2 refers to the bank that does not include the No. 1 cylinder.

  • Read Freeze Frame Data using the GTS. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P143E9C AND/OR P143F9C)


    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 / Trouble Codes.

    5. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      DTC P143E9C and/or P143F9C is output A
      DTC P143E9C and/or P143F9C and P04419C are output B
      DTC P143E9C and/or P143F9C and other DTCs are output C

      Tech Tips

      If any DTCs other than P143E9C and/or P143F9C are output, troubleshoot those DTCs first.


    B

    GO TO DTC P04419C Click here

    C

    GO TO DTC CHART Click here

    A

  2. CHECK EVAP PURGE LINE (NO. 2 TURBO PRESSURE SENSOR - INTAKE MANIFOLD)


    1. B006FJHC01
      *1 No. 2 Turbo Pressure Sensor (bank 1)
      *2 No. 2 Turbo Pressure Sensor (bank 2)
      *3

      Vacuum Hose

      (to intake manifold)

      Disconnect the vacuum hose from the No. 2 turbo pressure sensor.

    2. Start the engine.

    3. Use your finger to confirm that the vacuum hose has suction.

      OK
      Suction applied.
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE EVAP PURGE LINE

    OK

  3. CHECK EVAP PURGE LINE (INTAKE MANIFOLD - JOINT CONNECTOR)


    1. B006A23C01
      *1

      Fuel Vapor Feed Hose

      (to intake manifold)
      *2 Joint Connector

      Disconnect the fuel vapor feed hose from the joint connector.

    2. Start the engine.

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

      OK
      Suction applied.
      Result
      Proceed to
      OK
      NG

    NG

    CHECK NO. 1 CHECK VALVE Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (NO. 2 TURBO PRESSURE SENSOR - ECM)


    1. Disconnect the No. 2 turbo pressure sensor connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D42-3 (VC) - D1-96 (VCPR) Always Below 1 Ω
      D43-3 (VC2) - D1-96 (VCPR) Always Below 1 Ω
      D42-2 (PPG) or D1-114 (PPG) - Body ground and other terminals Always 10 kΩ or higher
      D43-2 (PPG2) or D1-113 (PPG2) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT NO. 2 TURBO PRESSURE SENSOR


    1. Inspect the No. 2 turbo pressure sensor.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    CLEAR DTC Click here

    OK

  6. CLEAR DTC


    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.

      Result
      Proceed to
      NEXT

    NEXT

  7. CHECK WHETHER DTC OUTPUT RECURS (P143E9C OR P143F9C)


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

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


      Powertrain > Engine > Utility
      Tester Display
      All Readiness

    3. Input the DTC: P143E9C or P143F9C.

    4. Check the DTC judgment result.

      Result
      Result Proceed to

      NORMAL

      (DTCs are not output)

      		 A

      ABNORMAL

      (DTC P143E9C or P143F9C is output)

      		 B

    A

    END

    B

    REPLACE ECM Click here

  8. CLEAR DTC


    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.

      Result
      Proceed to
      NEXT

    NEXT

  9. READ OUTPUT DTC (DTC P143E9C OR P143F9C)


    1. Remove the No. 2 turbo pressure sensor, switch bank 1 and bank 2, and then install the No. 2 turbo pressure sensor.

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

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

    4. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      DTC of switched bank is output A
      Same DTC is output B

    A

    REPLACE NO. 2 TURBO PRESSURE SENSOR Click here

    B

    REPLACE ECM Click here

  10. CHECK NO. 1 CHECK VALVE


    1. Check the No. 1 check valve.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE EVAP PURGE LINE

    NG

    REPLACE NO. 1 CHECK VALVE Click here