SFI SYSTEM, Diagnostic DTC:P2401, P2402, P2419, P2420

DTC Code DTC Name
P2401 Evaporative Emission System Leak Detection Pump Control Circuit Low
P2402 Evaporative Emission Leak Detection Pump Stuck ON
P2419 Evaporative Emission System Switching Valve Control Circuit Low
P2420 Evaporative Emission Pressure Switching Valve Stuck OFF

DTC SUMMARY

DTC No. Monitoring Item Malfunction Detection Condition Trouble Area Detection Timing Detection Logic
P2401 Leak detection pump stuck OFF

P2401, P2402, P2419 and P2420 stored when one of following conditions met during EVAP monitor:


  • Leak detection pump OFF malfunction

  • Leak detection pump ON malfunction

  • Vent valve ON (closed) malfunction

  • Vent valve OFF (opened) malfunction

  • Canister pump module

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

  • ECM

 Ignition switch ON or while EVAP monitor 1 trip
P2402 Leak detection pump stuck ON
P2419 Vent valve circuit low
P2420 Vent valve circuit high

DESCRIPTION

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

MONITOR DESCRIPTION

While the ECM monitors the EVAP system, it also monitors the status of the leak detection pump and the vent valve within the canister pump module. If the ECM detects an abnormality in the leak detection pump or vent valve operational statuses, the ECM stores the DTC, and illuminates the MIL.

CONFIRMATION DRIVING PATTERN

Note


  • The Evaporative System Check (Automatic Mode) consists of 5 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 more, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the fuel temperature below 35°C (95°F) and the coolant temperature below 45°C (113°F).


  1. Connect the GTS to the DLC3.

  2. Turn the ignition switch to ON and turn the GTS on.

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

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

  5. Turn the ignition switch to ON and turn the GTS on.

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

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

  8. Input the DTC: P2401, P2402, P2419 or P2420.

  9. 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.

  10. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs Click here.

    Tech Tips


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

    • If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

Refer to DTC P0451 Click here.

CAUTION / NOTICE / HINT

Note


  • Do not disassemble the canister pump module.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. INSPECT CANISTER PUMP MODULE (POWER SOURCE)


    1. A004KX8E03
      Text in Illustration
      *a

      Component without harness connected

      (Canister Pump Module)

      Turn the ignition switch off.

    2. Disconnect the canister pump module connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G8-3 - Body ground Ignition switch ON 11 to 14 V
      G8-5 - Body ground Ignition switch ON 11 to 14 V

    NG

    INSPECT RELAY (EFI MAIN1) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM)


    1. Turn the ignition switch off.

    2. Disconnect the canister pump module connector.

    3. Disconnect the ECM connector.

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

      Standard Resistance (Check for open)
      Tester Connection Condition Specified Condition
      A35-8 (MPMP) - G8-4 Always Below 1 Ω
      A35-1 (VPMP) - G8-1 Always Below 1 Ω
      Standard Resistance (Check for short)
      Tester Connection Condition Specified Condition
      A35-8 (MPMP) or G8-4 - Body ground Always 10 kΩ or higher
      A35-1 (VPMP) or G8-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT CANISTER PUMP MODULE


    1. Inspect the canister pump module Click here.


    OK

    CHECK INTERMITTENT PROBLEMS Click here

    NG

    REPLACE CANISTER PUMP MODULE Click here

  4. INSPECT RELAY (EFI MAIN1)


    1. Inspect the EFI MAIN1 relay Click here.


    NG

    REPLACE RELAY (EFI MAIN1)

    OK

  5. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - EFI MAIN1 RELAY)


    1. Turn the ignition switch off.

    2. Remove EFI MAIN1 relay from the engine room relay block assembly.

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

      Standard Resistance (Check for open)
      Tester Connection Condition Specified Condition
      G8-3 - EFI MAIN1 relay terminal 3 Always Below 1 Ω
      G8-5 - EFI MAIN1 relay terminal 3 Always Below 1 Ω
      Standard Resistance (Check for short)
      Tester Connection Condition Specified Condition
      G8-3 or EFI MAIN1 relay terminal 3 - Body ground Always 10 kΩ or higher
      G8-5 or EFI MAIN1 relay terminal 3 - Body ground Always 10 kΩ or higher

    OK

    GO TO ECM POWER SOURCE CIRCUIT Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR