SFI SYSTEM(w/o Canister Pump Module), Diagnostic DTC:P040318, P040319, P140018, P140019

DTC Code DTC Name
P040318 Exhaust Gas Recirculation "A" Circuit Current Below Threshold
P040319 Exhaust Gas Recirculation "A" Circuit Current Above Threshold
P140018 Exhaust Gas Recirculation "A" Control Circuit 2 Circuit Current Below Threshold
P140019 Exhaust Gas Recirculation "A" Control Circuit 2 Circuit Current Above Threshold

DESCRIPTION

Refer to DTC P04019C.

Click here

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P040318 Exhaust Gas Recirculation "A" Circuit Current Below Threshold Open or short in EGR A circuit for 1 second or more (1 trip detection logic).

  • Open or short in EGR valve assembly circuit

  • EGR valve assembly

  • ECM

 Comes on DTC stored SAE Code: P0489
P040319 Exhaust Gas Recirculation "A" Circuit Current Above Threshold Short in EGR A circuit for 1 second or more (1 trip detection logic).

  • Short in EGR valve assembly circuit

  • EGR valve assembly

  • ECM

 Comes on DTC stored SAE Code: P0490
P140018 Exhaust Gas Recirculation "A" Control Circuit 2 Circuit Current Below Threshold Open or short in EGR B circuit for 1 second or more (1 trip detection logic).

  • Open or short in EGR valve assembly circuit

  • EGR valve assembly

  • ECM

 Does not come on DTC stored SAE Code: P00489
P140019 Exhaust Gas Recirculation "A" Control Circuit 2 Circuit Current Above Threshold Short in EGR B circuit for 1 second or more (1 trip detection logic).

  • Short in EGR valve assembly circuit

  • EGR valve assembly

  • ECM

 Does not come on DTC stored SAE Code: P0490

MONITOR DESCRIPTION

These DTCs are stored if an open or short in the EGR valve assembly circuit is detected.

Example:


MONITOR STRATEGY

Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN

B007006E48

  1. Connect the GTS to the DLC3.

  2. Turn the ignition switch to ON.

  3. Turn the GTS on.

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

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

  6. Turn the ignition switch to ON [A].

  7. Turn the GTS on.

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

  9. Drive the vehicle at 20 km/h (12 mph) or more for 10 minutes or more [C].

    CAUTION:

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

  10. Enter the following menus: Powertrain / Engine / Trouble Codes [D].

  11. 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.

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

  13. Input the DTC: P040318, P040319, P140018 or P140019.

  14. 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 is NORMAL, the system is normal.

    • If the judgment result is ABNORMAL, the system is malfunctioning.

    • If the judgment result is INCOMPLETE, perform steps [B] through [D] again.

WIRING DIAGRAM

B0071IME04

CAUTION / NOTICE / HINT

Tech Tips

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. PERFORM ACTIVE TEST USING GTS (CONTROL THE EGR STEP POSITION)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

      Tech Tips

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

    5. Enter the following menus: Powertrain / Engine / Active Test / Control the EGR Step Position / Data List / Engine Speed, Intake Manifold Absolute Pressure and Coolant Temperature.


      Powertrain > Engine > Active Test
      Active Test Display
      Control the EGR Step Position
      Data List Display
      Engine Speed
      Intake Manifold Absolute Pressure
      Coolant Temperature

    6. Check the engine idling condition and Intake Manifold Absolute Pressure values in the Data List while performing the Active Test.

      Note


      • Do not leave the EGR valve open for 10 seconds or more during the Active Test.

      • Be sure to return the EGR valve to step 0 when the Active Test is completed.

      • Do not open the EGR valve 30 steps or more during the Active Test.

      OK
      The value of Intake Manifold Absolute Pressure and Engine Speed change in response to EGR step position.
      Standard
      - Control the EGR Step Position (Active Test)
      0 Steps 0 to 30 Steps
      Idling condition Steady idling Idling changes from steady to rough idling or engine stalls

      Intake Manifold Absolute Pressure

      (Data List)

      Intake Manifold Absolute Pressure value is 20 to 40 kPa(abs)

      (2.9 to 5.8 psi(abs))

      (EGR valve is fully closed)

      		 Intake Manifold Absolute Pressure value is at least +10 kPa (1.45 psi) higher than when EGR valve is fully closed

      Tech Tips

      During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in the EGR valve.

      Result
      Proceed to
      OK
      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

  2. INSPECT EGR VALVE ASSEMBLY


    1. Inspect the EGR valve assembly.

      Click here

      Tech Tips

      Perform "Inspection After Repair" after replacing the EGR valve assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE EGR VALVE ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (EGR VALVE ASSEMBLY - ECM)


    1. Disconnect the EGR valve assembly 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
      C90-1 (EGA+) - C57-3 (EGA+) Always Below 1 Ω
      C90-2 (EGA-) - C57-4 (EGA-) Always Below 1 Ω
      C90-4 (EGB+) - C57-6 (EGB+) Always Below 1 Ω
      C90-3 (EGB-) - C57-5 (EGB-) Always Below 1 Ω
      C90-1 (EGA+) or C57-3 (EGA+) - Body ground and other terminals Always 10 kΩ or higher
      C90-2 (EGA-) or C57-4 (EGA-) - Body ground and other terminals Always 10 kΩ or higher
      C90-4 (EGB+) or C57-6 (EGB+) - Body ground and other terminals Always 10 kΩ or higher
      C90-3 (EGB-) or C57-5 (EGB-) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR