SFI SYSTEM, Diagnostic DTC:P0458, P0459

DTC Code DTC Name
P0458 Evaporative Emission System Purge Control Valve Circuit Low
P0459 Evaporative Emission System Purge Control Valve Circuit High

DESCRIPTION

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

The ECM changes the duty signals to the purge valve (Vacuum Switching Valve for Purge Control) so that the intake amount of hydrocarbon emissions is appropriate for the driving conditions (engine load, engine speed, vehicle speed, etc.) after the engine is warmed up.

DTC No. DTC Detection Condition Trouble Area
P0458

The voltage of purge valve circuit is low for 2.5 seconds or more.

(2 trip detection logic)

  • Open or short in purge valve circuit

  • purge valve

  • ECM
P0459

The voltage of purge valve circuit is high for 2.5 seconds or more.

(2 trip detection logic)

MONITOR DESCRIPTION

The ECM monitors the output terminal voltage when the vacuum switching valve assembly is actuated. By turning the FET in the ECM on and off, the purge valve assembly is subject to duty control. If the ECM control value (drive signal) and the output terminal voltage duty cycle continue to not match, then the ECM interprets this as a malfunction in the vacuum switching valve circuit, illuminates the MIL, and stores the DTC.

CONFIRMATION DRIVING PATTERN

A004KP7E03

  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 operation) 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. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.

    Tech Tips

    Check the engine coolant temperature is 20°C (68°F) or less at engine started.

  7. Perform the following the confirmation driving pattern.

    CAUTION:

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


    1. Drive the vehicle at 80 km/h (50 mph) or more for 20 minutes or more [A].

    2. Stop the vehicle.

    3. Idle the engine for 1 minute or more [B].

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

  9. Read 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: P0458 or P0459.

  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
    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.

  13. If the test result is INCOMPLETE or N/A and no 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

A004KYNE07

CAUTION / NOTICE / HINT

Note

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

Tech Tips

Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. 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. PERFORM ACTIVE TEST USING GTS (ACTIVATE THE VSV FOR EVAP CONTROL)


    1. A004KYIE02
      Text in Illustration
      *a Purge valve ON
      *b Purge valve OFF

      Connect a GTS to the DLC3.

    2. Disconnect the vacuum hose (canister side) from the purge valve.

    3. Start the engine.

    4. Turn the GTS on.

    5. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for EVAP Control.

    6. When the purge valve is operated using the GTS, check whether the port of the purge valve applies suction to your finger.

      OK
      Tester Operation Specified Condition
      VSV ON Purge valve port applies suction to finger
      VSV OFF Purge valve port applies no suction to finger
      Result
      Result Proceed to
      NG A
      OK B

    B

    CHECK HARNESS AND CONNECTOR (PURGE VALVE - EFI MAIN1 RELAY) Click here

    A

  2. INSPECT PURGE VALVE


    1. Inspect the purge valve Click here.


    NG

    REPLACE PURGE VALVE Click here

    OK

  3. INSPECT PURGE VALVE (POWER SOURCE)


    1. A004IU0E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Purge valve)

      Disconnect the purge valve connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      d1-1 - Body ground Ignition switch ON 11 to 14 V

    NG

    INSPECT RELAY (EFI MAIN1) Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (PURGE VALVE - ECM)


    1. Disconnect the ECM connector.

    2. Disconnect the purge valve connector.

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

      Standard Resistance (Check for open)
      Tester Connection Condition Specified Condition
      A36-11 (PRG) - d1-2 Always Below 1 Ω
      Standard Resistance (Check for short)
      Tester Connection Condition Specified Condition
      A36-11 (PRG) or d1-2 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK WHETHER DTC OUTPUT RECURS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

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

    6. Turn the ignition switch to ON and turn the tester on.

    7. Start the engine.

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

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

    10. Read DTCs.

      Result
      Result Proceed to
      No DTC is output A
      P0458 or P0459 is output B

      Tech Tips

      If the engine does not start, replace the ECM.


    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

    REPLACE ECM Click here

  6. INSPECT RELAY (EFI MAIN1)


    1. Inspect the EFI MAIN1 relay Click here.


    NG

    REPLACE RELAY (EFI MAIN1)

    OK

  7. CHECK HARNESS AND CONNECTOR (PURGE VALVE - EFI MAIN1 RELAY)


    1. Disconnect the purge valve connector.

    2. Remove the 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
      d1-1 - EFI MAIN1 relay terminal 3 Always Below 1 Ω
      Standard Resistance (Check for short)
      Tester Connection Condition Specified Condition
      d1-1 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