SFI SYSTEM, Diagnostic DTC:P040314, P140000, P140596, P141004

DTC Code DTC Name
P040314 Exhaust Gas Recirculation "A" Control Circuit 1 Open
P140000 Exhaust Gas Recirculation "A" Control Circuit 2 Open
P140596 Exhaust Gas Recirculation "A" Control Circuit 3 Open
P141004 Exhaust Gas Recirculation "A" Control Circuit 4 Open

DESCRIPTION

Refer to DTC P04019C Click here.

DTC No. DTC Detection Condition Trouble Area
P040314 Open or short in EGR1 circuit for 1 second or more (1 trip detection logic).

  • Open or short in EGR valve assembly circuit

  • EGR valve assembly

  • No. 1 integration relay

  • ECM
P140000 Open or short in EGR2 circuit for 1 second or more (1 trip detection logic).

  • Open or short in EGR valve assembly circuit

  • EGR valve assembly

  • No. 1 integration relay

  • ECM
P140596 Open or short in EGR3 circuit for 1 second or more (1 trip detection logic).

  • Open or short in EGR valve assembly circuit

  • EGR valve assembly

  • No. 1 integration relay

  • ECM
P141004 Open or short in EGR4 circuit for 1 second or more (1 trip detection logic).

  • Open or short in EGR valve assembly circuit

  • EGR valve assembly

  • No. 1 integration relay

  • ECM

MONITOR DESCRIPTION

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


MONITOR STRATEGY

Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN

A01W4GRE35

  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 [A].

  6. Start the engine and warm it up [B].

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

    CAUTION:

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

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

  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: P040314, P140000, P140596 or P141004.

  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.

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

WIRING DIAGRAM

A01W1FEE04

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. 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 engine switch on (IG).

    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 / All Data / Engine Speed and Intake Manifold Absolute Pressure.

    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
      Intake Manifold Absolute Pressure and Engine Speed change in response to EGR step position.
      Standard
      - 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)

      (150 to 300 mmHg(abs))

      (EGR valve is fully closed)

      		 Intake Manifold Absolute Pressure value is at least +10 kPa (75 mmHg) 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.


    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.


    NG

    REPLACE EGR VALVE ASSEMBLY Click here

    OK

  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF EGR VALVE ASSEMBLY)


    1. A01W4ZXE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to EGR Valve Assembly)

      Disconnect the EGR valve assembly connector.

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D85-2 (+B1) - Body ground Engine switch on (IG) 11 to 14 V
      D85-5 (+B2) - Body ground Engine switch on (IG) 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - EGR VALVE ASSEMBLY) Click here

    OK

  4. 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
      D85-4 (EGR1) - D87-36 (EGR1) Always Below 1 Ω
      D85-3 (EGR2) - D87-33 (EGR2) Always Below 1 Ω
      D85-6 (EGR3) - D87-37 (EGR3) Always Below 1 Ω
      D85-1 (EGR4) - D87-32 (EGR4) Always Below 1 Ω
      D85-4 (EGR1) or D87-36 (EGR1) - Body ground and other terminals Always 10 kΩ or higher
      D85-3 (EGR2) or D87-33 (EGR2) - Body ground and other terminals Always 10 kΩ or higher
      D85-6 (EGR3) or D87-37 (EGR3) - Body ground and other terminals Always 10 kΩ or higher
      D85-1 (EGR4) or D87-32 (EGR4) - Body ground and other terminals Always 10 kΩ or higher

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - EGR VALVE ASSEMBLY)


    1. Disconnect the No. 1 integration relay connector.

    2. Disconnect the EGR valve assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1A-8 - D85-2 (+B1) Always Below 1 Ω
      1A-8 - D85-5 (+B2) Always Below 1 Ω
      1A-8 or D85-2 (+B1) - Body ground and other terminals Always 10 kΩ or higher
      1A-8 or D85-5 (+B2) - Body ground and other terminals Always 10 kΩ or higher

    OK

    REPLACE NO. 1 INTEGRATION RELAY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR