SFI SYSTEM(w/ Canister Pump Module), Diagnostic DTC:P043E, P043F, P2401, P2402, P2419

DTC Code DTC Name
P043E Evaporative Emission System Leak Detection Reference Orifice Low Flow
P043F Evaporative Emission System Leak Detection Reference Orifice High Flow
P2401 Evaporative Emission Leak Detection Pump Stuck OFF
P2402 Evaporative Emission Leak Detection Pump Stuck ON
P2419 Evaporative Emission Pressure Switching Valve Stuck ON

DTC SUMMARY

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P043E Evaporative Emission System Leak Detection Reference Orifice Low Flow Reference orifice clogged during key-off EVAP monitor

  • Canister pump module

  • Connector or wire harness (Canister pump module - ECM)

  • ECM

 Comes on DTC stored
P043F Evaporative Emission System Leak Detection Reference Orifice High Flow Reference orifice high-flow during key-off EVAP monitor

  • Canister pump module

  • Connector or wire harness (Canister pump module - ECM)

  • ECM

 Comes on DTC stored
P2401 Evaporative Emission Leak Detection Pump Stuck OFF Leak detection pump off malfunction during key-off EVAP monitor

  • Canister pump module

  • Connector or wire harness (Canister pump module - ECM)

  • ECM

 Comes on DTC stored
P2402 Evaporative Emission Leak Detection Pump Stuck ON Leak detection pump on malfunction during key-off EVAP monitor

  • Canister pump module

  • Connector or wire harness (Canister pump module - ECM)

  • ECM

 Comes on DTC stored
P2419 Evaporative Emission Pressure Switching Valve Stuck ON Vent valve on (closed) malfunction during key-off EVAP monitor

  • Canister pump module

  • Connector or wire harness (Canister pump module - ECM)

  • ECM

 Comes on DTC stored
DTC No. Monitoring Item Detection Timing Detection Logic
P043E Reference orifice clogged While engine switch off 2 trip
P043F Reference orifice high-flow
P2401 Leak detection pump stuck off
P2402 Leak detection pump stuck on
P2419 Vent valve stuck closed

Tech Tips

The reference orifice is located inside the canister pump module.

DESCRIPTION

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

Click here

MONITOR DESCRIPTION

5 hours* after the engine switch is turned off, the leak detection pump creates negative pressure (vacuum) in the EVAP system. The ECM monitors for leaks and actuator malfunctions based on the EVAP pressure.

Tech Tips

*: If the engine coolant temperature is not less than 35°C (95°F) 5 hours after the engine switch is turned off, the monitor check starts 2 hours later. If it is still not less than 35°C (95°F) 7 hours after the engine switch is turned off, the monitor check starts 2.5 hours later.

Sequence Operation Description Duration
- ECM activation Activated by soak timer, 5, 7 or 9.5 hours after engine switch turned off. -
A Atmospheric pressure measurement

Vent valve is turned off (vent) and EVAP system pressure is measured by ECM in order to register atmospheric pressure.

If pressure in EVAP system is not between 70 kPa(abs) and 110 kPa(abs) [525 mmHg(abs) and 825 mmHg(abs)], ECM cancels EVAP system monitor.

 60 seconds
B First reference pressure measurement In order to determine reference pressure, leak detection pump creates negative pressure (vacuum) through reference orifice and then ECM checks if leak detection pump and vent valve operate normally. 360 seconds
C EVAP system pressure measurement

Vent valve is turned on (closed) to shut EVAP system.

Negative pressure (vacuum) is created in EVAP system, and EVAP system pressure is then measured.

Write down measured value as it will be used in leak check

If EVAP pressure does not stabilize within 15 minutes, ECM cancels EVAP system monitor.

 15 minutes*
D Purge VSV monitor

Purge VSV is opened and then EVAP system pressure is measured by ECM.

Large increase indicates normal.

 10 seconds
E Second reference pressure measurement

After second reference pressure measurement, leak check is performed by comparing first and second reference pressure measurements.

If stabilized system pressure is higher than second reference pressure, ECM determines that EVAP system is leaking.

 60 seconds
- Final check Atmospheric pressure is measured and then monitoring result is recorded by ECM. -

*: If only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize.

B000U2EC06
*1 Purge VSV: Off (Closed) *2 Purge VSV: On (Open)
*3 Vent Valve: Off (Vent) *4 Vent Valve: On (Closed)
*5 Leak Detection Pump: Off *6 Leak Detection Pump: On
*7 Reference Orifice (0.02 inch) *8 Canister Pressure Sensor
*9 Canister *10 Fuel Tank
*11 Canister Pump Module *12 Canister Filter
*a

Operation A:

Atmospheric Pressure Measurement

 *b

Operation B, E:

Reference Pressure Measurement
*c

Operation C:

EVAP System Pressure Measurement

 *d

Operation D:

Purge VSV Monitor
*e Atmospheric Pressure *f Negative Pressure

The leak detection pump creates negative pressure through the reference orifice (in operation B and E). When the system is normal, the EVAP pressure is between 97 to 100 kPa(abs) [726 to 750 mmHg(abs)]* and saturated within a minute. If not, the ECM interprets this as a malfunction. The ECM illuminates the MIL and stores a DTC if this malfunction is detected in consecutive drive cycles.

*: Typical value.

B000XDJE05

MONITOR STRATEGY

Required Sensors/Components Canister pump module
Frequency of Operation Once per driving cycle

CONFIRMATION DRIVING PATTERN

Note


  • The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the GTS. It takes a maximum of approximately 24 minutes.

  • Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable.

  • Do not run the engine during this operation.

  • When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the fuel temperature less than 35°C (95°F).


  1. Connect the GTS to the DLC3.

  2. Turn the engine switch on (IG).

  3. Turn the GTS on.

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

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

  6. Turn the engine switch on (IG).

  7. Turn the GTS on.

  8. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.

  9. After the "Evaporative System Check" is completed, check for All Readiness by entering the following menus: Powertrain / Engine / Utility / All Readiness.

  10. Input the DTC: P043E, P043F, P2401, P2402 or P2419.

  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

    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 or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.

PROCEDURE


  1. GO TO EVAP SYSTEM


    1. Refer to EVAP System.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    END