SFI SYSTEM, Diagnostic DTC:P030000, P030027, P030085, P030100, P030200, P030300, P030400

DTC Code DTC Name
P030000 Random/Multiple Cylinder Misfire Detected
P030027 Random/Multiple Cylinder Misfire Detected (Emission) Signal Rate of Change Above Threshold
P030085 Random / Multiple Cylinder Misfire Detected (Over Temperature) Signal Above Allowable Range
P030100 Cylinder 1 Misfire Detected
P030200 Cylinder 2 Misfire Detected
P030300 Cylinder 3 Misfire Detected
P030400 Cylinder 4 Misfire Detected

DESCRIPTION

When the engine misfires, high concentrations of hydrocarbons (HC) enter the exhaust gas. Extremely high hydrocarbon concentration levels can cause an increase in exhaust emission levels. Extremely high concentrations of hydrocarbons can also cause increases in the three-way catalytic converter temperature, which may cause damage to the three-way catalytic converter. To prevent this increase in emissions and to limit the possibility of thermal damage, the ECM monitors the misfire count. When the temperature of the three-way catalytic converter reaches the point of thermal degradation, the ECM blinks the MIL. To monitor misfires, the ECM uses both the camshaft position sensor and the crankshaft position sensor. The camshaft position sensor is used to identify any misfiring cylinders and the crankshaft position sensor is used to measure variations in the crankshaft rotation speed. Misfires are counted when the crankshaft rotation speed variations exceed predetermined thresholds. If the misfire count exceeds the threshold levels, and could cause emission control system performance deterioration, the ECM illuminates the MIL and stores a DTC.

DTC No. DTC Detection Condition Trouble Area
P030000

Simultaneous misfiring of several cylinders occurs and one of the following conditions is met (2 trip detection logic):


  • A misfire occurs that may damage the three-way catalytic converter (MIL blinks immediately when detected).

  • An emission deterioration misfire occurs (MIL illuminates).

  • Open or short in engine wire harness

  • Connector connection

  • Vacuum hose connections

  • Ignition system

  • Fuel injector assembly (for port injection)

  • Fuel injector assembly (for direct injection)

  • Fuel pressure

  • Mass air flow meter sub-assembly

  • Engine coolant temperature sensor

  • Compression pressure

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Intake system

  • EGR valve assembly

  • ECM
P030027 An emission deterioration misfire occurs (2 trip detection logic).

  • Open or short in engine wire harness

  • Connector connection

  • Vacuum hose connections

  • Ignition system

  • Fuel injector assembly (for port injection)

  • Fuel injector assembly (for direct injection)

  • Fuel pressure

  • Mass air flow meter sub-assembly

  • Engine coolant temperature sensor

  • Compression pressure

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Intake system

  • EGR valve assembly

  • ECM
P030085 A misfire occurs that may damage the three-way catalytic converter (2 trip detection logic).

  • Open or short in engine wire harness

  • Connector connection

  • Vacuum hose connections

  • Ignition system

  • Fuel injector assembly (for port injection)

  • Fuel injector assembly (for direct injection)

  • Fuel pressure

  • Mass air flow meter sub-assembly

  • Engine coolant temperature sensor

  • Compression pressure

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Intake system

  • EGR valve assembly

  • ECM
P030100

Misfiring of a specific cylinder occurs and one of the following conditions is met (2 trip detection logic):


  • A misfire occurs that may damage the three-way catalytic converter (MIL blinks immediately when detected).

  • An emission deterioration misfire occurs (MIL illuminates).

  • Open or short in engine wire harness

  • Connector connection

  • Vacuum hose connections

  • Ignition system

  • Fuel injector assembly (for port injection)

  • Fuel injector assembly (for direct injection)

  • Fuel pressure

  • Mass air flow meter sub-assembly

  • Engine coolant temperature sensor

  • Compression pressure

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Intake system

  • EGR valve assembly

  • ECM
P030200

Misfiring of a specific cylinder occurs and one of the following conditions is met (2 trip detection logic):


  • A misfire occurs that may damage the three-way catalytic converter (MIL blinks immediately when detected).

  • An emission deterioration misfire occurs (MIL illuminates).

  • Open or short in engine wire harness

  • Connector connection

  • Vacuum hose connections

  • Ignition system

  • Fuel injector assembly (for port injection)

  • Fuel injector assembly (for direct injection)

  • Fuel pressure

  • Mass air flow meter sub-assembly

  • Engine coolant temperature sensor

  • Compression pressure

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Intake system

  • EGR valve assembly

  • ECM
P030300

Misfiring of a specific cylinder occurs and one of the following conditions is met (2 trip detection logic):


  • A misfire occurs that may damage the three-way catalytic converter (MIL blinks immediately when detected).

  • An emission deterioration misfire occurs (MIL illuminates).

  • Open or short in engine wire harness

  • Connector connection

  • Vacuum hose connections

  • Ignition system

  • Fuel injector assembly (for port injection)

  • Fuel injector assembly (for direct injection)

  • Fuel pressure

  • Mass air flow meter sub-assembly

  • Engine coolant temperature sensor

  • Compression pressure

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Intake system

  • EGR valve assembly

  • ECM
P030400

Misfiring of a specific cylinder occurs and one of the following conditions is met (2 trip detection logic):


  • A misfire occurs that may damage the three-way catalytic converter (MIL blinks immediately when detected).

  • An emission deterioration misfire occurs (MIL illuminates).

  • Open or short in engine wire harness

  • Connector connection

  • Vacuum hose connections

  • Ignition system

  • Fuel injector assembly (for port injection)

  • Fuel injector assembly (for direct injection)

  • Fuel pressure

  • Mass air flow meter sub-assembly

  • Engine coolant temperature sensor

  • Compression pressure

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Intake system

  • EGR valve assembly

  • ECM

When DTCs for misfiring cylinders are randomly stored, but DTC P030000 is not stored, it indicates that misfires have been detected in different cylinders at different times. DTC P030000 is only stored when several misfiring cylinders are detected at the same time.

MONITOR DESCRIPTION

The ECM illuminates the MIL and stores a DTC when the following condition, which could cause emission deterioration, is detected (2 trip detection logic).


The ECM flashes the MIL (immediate detection logic) and stores a DTC (2 trip detection logic) when the following condition, which could cause damage to the three-way catalytic converter, is detected.


MONITOR STRATEGY

Required Sensors/Components (Main)

Crankshaft position sensor

Camshaft position sensor
Required Sensors/Components (Related)

Engine coolant temperature

Intake air temperature sensor

Mass air flow meter sub-assembly
Frequency of Operation Continuous

TYPICAL ENABLING CONDITIONS

Misfire
Intake air temperature Higher than -10°C (14°F)
Either of the following conditions is met (a) or (b)
(a) Engine coolant temperature at engine start Higher than -7°C (19°F)
(b) Engine coolant temperature Higher than 20°C (68°F)
Monitor Period of Emission-related Misfire
Duration Crankshaft 1000 revolutions x 4
Monitor Period of Catalyst-damaging Misfire (MIL Blinks)
Duration Crankshaft 200 revolutions x 3

CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

  2. Turn the engine switch on (IG).

  3. Turn the GTS on.

  4. Record the DTC(s) and freeze frame data.

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

  6. Using the GTS, switch the ECM from normal mode to check mode Click here.

  7. Start the engine.

  8. Read the misfire counts of each cylinder, Misfire Count Cylinder #1 to Misfire Count Cylinder #4, with the engine idling. If any misfire count is displayed, skip the following confirmation driving pattern.

  9. Drive the vehicle so that the vehicle conditions displayed in Misfire RPM and Misfire Load of the Data List are the same as the freeze frame data. Perform this step several times.

    Tech Tips

    In order to store misfire DTCs, it is necessary to operate the vehicle for the period of time shown in the table below, confirm the Misfire RPM and Misfire Load in the Data List.

    Engine speed Duration
    Idling 8 minutes or more
    1000 4.5 minutes or more
    2000 2.5 minutes or more
    3000 1.5 minutes or more

  10. Check whether misfires have occurred by checking DTCs and freeze frame data.

    Tech Tips

    Do not turn the engine switch off until the output DTC(s) and freeze frame data have been recorded. When the ECM returns to normal mode (default), the stored DTC(s), freeze frame data and other data are cleared.

  11. Record the DTC(s), freeze frame data and misfire counts.

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

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

WIRING DIAGRAM

Refer to DTC P010012 for the mass air flow meter sub-assembly circuit Click here.

CAUTION / NOTICE / HINT

Note

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

Tech Tips


  • If any DTCs other than misfire DTCs are output, troubleshoot those DTCs first.

  • Check the "Fuel Cut Elapsed Time" in the Data List or the Freeze Frame Data. If the elapsed time is over 0 seconds, then the engine speed is high (engine speed at which fuel cut occurs + 500 rpm).

    When this has happened, there is the possibility that the No. 1 valve rocker arm sub-assembly will become loose and a fire could start, so check that the No. 1 valve rocker arm sub-assembly is properly attached.

  • By clearing the DTCs, "Fuel Cut Elapsed Time" will be cleared.

  • If the misfire does not recur when the vehicle is brought to the workshop, reproduce the conditions stored in the ECM as freeze frame data.

  • If the misfire still cannot be reproduced even though the conditions stored in the ECM as freeze frame data have been reproduced, one of the following factors is considered to be a possible cause of the problem:


    1. There was insufficient fuel in the tank.

    2. Improper fuel was used.

    3. The spark plugs have been contaminated.

    4. The problem requires further diagnosis.

  • After finishing repairs, check the misfire counts of the cylinders (Misfire Count Cylinder #1 to Misfire Count Cylinder #4).

  • Be sure to confirm that no misfiring cylinder DTCs are stored again by conducting the confirmation driving pattern after finishing repairs.

  • When one of Short FT Bank 1 or Long FT Bank 1 in the freeze frame data is outside the range of +/-20%, the air fuel ratio may be rich (-20% or less) or lean (+20% or higher).

  • When Coolant Temperature in the freeze frame data is less than 75°C (167°F), the misfires have occurred only while warming up the engine.

  • Vehicle body vibration caused by an extremely imbalanced drive wheel may cause misfire DTCs to be stored.

  • 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. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO MISFIRE DTCS)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

    5. Read the DTCs.

      Result
      Result Proceed to
      DTC P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 are output A
      DTC P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 and other DTCs are output B

      Tech Tips

      If any DTCs other than P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. CHECK PCV HOSE CONNECTIONS


    1. Check the PCV hose connections Click here.

      OK
      PCV valve and hose are correctly connected and are not damaged.

    NG

    REPAIR OR REPLACE PCV HOSE

    OK

  3. READ VALUE USING GTS (MISFIRE RPM AND MISFIRE LOAD)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / Misfire RPM and Misfire Load.

    5. Read and note the Misfire RPM and Misfire Load values.

      Tech Tips

      The Misfire RPM and Misfire Load values indicate the vehicle conditions under which the misfire occurred.


    NEXT

  4. CHECK MISFIRE COUNT OF PORT INJECTION


    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.

    5. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Mode / Port / Data List / All Data / Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4.

      Tech Tips


      • When using the "Control the Injection Mode" Active Test to check the condition of the engine, switch from "Port" to "Direct".

      • Do not switch from "Direct" to "Port". When performing the inspection more than once, after the Active Test ends, lightly race the engine, and then perform the inspection from "Port" again.

      • If the display does not switch from "Port" even after lighting racing the engine, idle the engine for approximately 1 minute, and then lightly race the engine.

    6. Read each value for Misfire Count Cylinder #1 to Misfire Count Cylinder #4 and Injection Mode displayed on the GTS. If no misfire counts occur in any cylinders, perform procedure [A] and [B] and then check the misfire counts again.


      1. Drive the vehicle with the Misfire RPM and Misfire Load noted in the "Read Value Using GTS (Misfire RPM and Misfire Load)" procedures above [A].

      2. Read the Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4 or DTCs displayed on the GTS [B].

      Result
      Injection Mode Misfire Count Proceed to
      Port 1 or 2 cylinders have misfire counts A
      3 cylinders or more have misfire counts
      There are no misfire counts B

    B

    CHECK MISFIRE COUNT OF DIRECT INJECTION Click here

    A

  5. CHECK MISFIRE COUNT OF DIRECT INJECTION


    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.

    5. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Mode / Direct / Data List / All Data / Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4.

      Tech Tips


      • When using the "Control the Injection Mode" Active Test to check the condition of the engine, switch from "Port" to "Direct".

      • Do not switch from "Direct" to "Port". When performing the inspection more than once, after the Active Test ends, lightly race the engine, and then perform the inspection from "Port" again.

      • If the display does not switch from "Port" even after lighting racing the engine, idle the engine for approximately 1 minute, and then lightly race the engine.

    6. Read each value for Misfire Count Cylinder #1 to Misfire Count Cylinder #4 and Injection Mode displayed on the GTS. If no misfire counts occur in any cylinders, perform procedure [A] and [B] and then check the misfire counts again.


      1. Drive the vehicle with the Misfire RPM and Misfire Load noted in the "Read Value Using GTS (Misfire RPM and Misfire Load)" procedures above [A].

      2. Read the Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4 or DTCs displayed on the GTS [B].

      Result
      Misfire Count Proceed to
      Port (Result of Step 4) Direct
      1 or 2 cylinders have misfire counts 1 or 2 cylinders have misfire counts A
      3 cylinders or more have misfire counts 3 cylinders or more have misfire counts B
      1 or 2 cylinders have misfire counts There are no misfire counts C
      3 cylinders or more have misfire counts There are no misfire counts D

      Tech Tips

      Perform "Inspection After Repair" after replacing the fuel injector assembly (for port injection) Click here.


    A

    INSPECT SPARK PLUG Click here

    B

    CHECK INTAKE SYSTEM Click here

    C

    REPLACE FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION (MISFIRING CYLINDER)) Click here

    D

  6. CHECK FUEL PRESSURE (FOR LOW PRESSURE SIDE)


    1. Check the fuel pressure (for low pressure side) Click here.

      Tech Tips

      Perform "Inspection After Repair" after replacing the fuel injector assembly (for port injection) Click here.


    OK

    REPLACE FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION (MISFIRING CYLINDER)) Click here

    NG

  7. CHECK FUEL PUMP OPERATION (FOR LOW PRESSURE SIDE)


    1. Check the fuel pump operation (for low pressure side) Click here.


    OK

    CHECK AND REPLACE FUEL SYSTEM (PRESSURE REGULATOR, PIPE LINE AND FILTER)

    NG

    CHECK FUEL PUMP CONTROL CIRCUIT Click here

  8. CHECK MISFIRE COUNT OF DIRECT INJECTION


    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.

    5. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Mode / Direct / Data List / All Data / Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4.

      Tech Tips


      • When using the "Control the Injection Mode" Active Test to check the condition of the engine, switch from "Port" to "Direct".

      • Do not switch from "Direct" to "Port". When performing the inspection more than once, after the Active Test ends, lightly race the engine, and then perform the inspection from "Port" again.

      • If the display does not switch from "Port" even after lighting racing the engine, idle the engine for approximately 1 minute, and then lightly race the engine.

    6. Read each value for Misfire Count Cylinder #1 to Misfire Count Cylinder #4 and Injection Mode displayed on the GTS. If no misfire counts occur in any cylinders, perform procedure [A] and [B] and then check the misfire counts again.


      1. Drive the vehicle with the Misfire RPM and Misfire Load noted in the "Read Value Using GTS (Misfire RPM and Misfire Load)" procedures above [A].

      2. Read the Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4 or DTCs displayed on the GTS [B].

      Result
      Misfire Count Proceed to
      Port (Result of Step 4) Direct
      There are no misfire counts There are misfire counts A
      There are no misfire counts There are no misfire counts B

      Tech Tips

      Perform "Inspection After Repair" after replacing the fuel injector assembly (for direct injection) Click here.


    A

    REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION) Click here

    B

  9. CHECK MISFIRE COUNT


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.

    5. Start the engine and warm it up.

    6. Enter the following menus: Powertrain / Engine / Data List / All Data / Injection Mode, Misfire Count Cylinder #1 to Misfire Count Cylinder #4, Misfire RPM and Misfire Load.

    7. Drive the vehicle with Misfire RPM and Misfire Load.

    8. Monitor all of the misfire count values or DTCs and Injection Mode displayed on the GTS.

      Result
      Misfire Count Injection Mode Proceed to
      There are no misfire counts - A
      1 or 2 cylinders have misfire counts Port or Either B
      3 cylinders or more have misfire counts Port or Either C
      There are misfire counts Direct D

      Tech Tips

      Perform "Inspection After Repair" after replacing the fuel injector assembly (for direct injection) Click here.


    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    C

    CHECK INTAKE SYSTEM Click here

    D

    REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION) Click here

    B

  10. INSPECT SPARK PLUG


    1. Inspect the spark plug of the misfiring cylinder Click here.

      Tech Tips

      Perform "Inspection After Repair" after replacing the spark plug Click here.


    NG

    REPLACE SPARK PLUG Click here

    OK

  11. CHECK FOR SPARK (SPARK TEST)


    1. Perform a spark test Click here.

      Tech Tips


      • If the result of the spark test is normal, proceed to the next step.

      • Perform "Inspection After Repair" after replacing the spark plug or ignition coil assembly Click here.


    NEXT

  12. CHECK CYLINDER COMPRESSION PRESSURE


    1. Measure the cylinder compression pressure of the misfiring cylinder Click here.

      Tech Tips

      Perform "Inspection After Repair" after repairing or replacing the engine assembly Click here.


    OK

    REPLACE ECM Click here

    NG

    CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

  13. CHECK INTAKE SYSTEM


    1. Check the intake system for vacuum leaks Click here.

      OK
      No leaks from intake system.

      Tech Tips

      Perform "Inspection After Repair" after repairing or replacing the intake system Click here.


    NG

    REPAIR OR REPLACE INTAKE SYSTEM

    OK

  14. READ VALUE USING GTS (COOLANT TEMPERATURE)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / Coolant Temperature.

    5. Read the Data List twice, when the engine is both cold and warmed up.

      Standard
      GTS Display Condition Specified Condition
      Coolant Temperature Cold engine Same as ambient air temperature
      Warm engine Between 75 and 100°C (167 and 212°F)

      Tech Tips

      Perform "Inspection After Repair" after replacing the engine coolant temperature sensor Click here.


    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    OK

  15. READ VALUE USING GTS (MASS AIR FLOW SENSOR)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG) and turn the GTS on.

    3. Start the engine.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / Engine Speed, Mass Air Flow Sensor and Coolant Temperature.

    5. Allow the engine to idle until Coolant Temperature reaches 75°C (167°F) or higher.

    6. Read Mass Air Flow Sensor with the engine speed at 3000 rpm.

      Standard
      GTS Display Condition Specified Condition
      Mass Air Flow Sensor

      Shift lever position: P

      A/C: Off

      Engine Speed: 3000 rpm

      		 Between 6.2 gm/sec and 11.2 gm/sec

    NG

    CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY CONNECTOR CONNECTION) Click here

    OK

  16. CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH)


    1. Remove the cylinder head cover sub-assembly.

      A01W1LAE02
      Text in Illustration
      *a 7.45° *b 32.43°
      *c Timing Mark *d "0" Timing Mark
      *e Groove - -

    2. Turn the crankshaft pulley and align its groove with the "0" timing mark of the timing chain cover.

    3. Check that the timing marks of the camshaft timing gear assembly and camshaft timing exhaust gear assembly are at the positions shown in the illustration.

      Tech Tips

      If the timing marks are not at the positions shown, turn the crankshaft one revolution clockwise.

      OK
      Timing marks on camshaft timing gear assembly and camshaft timing exhaust gear assembly are at the positions shown in the illustration.

      Tech Tips

      If the result is not as specified, check for mechanical malfunctions that may have affected the valve timing, such as a jumped tooth or stretching of the timing chain.


    OK

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

    NG

  17. CHECK ENGINE MECHANICAL SYSTEM


    1. Check for mechanical malfunctions that affect the valve timing, such as a jumped tooth or stretching of the timing chain.


    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

    OK

  18. CHECK WHETHER DTC OUTPUT RECURS (MISFIRE DTCS)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.

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

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

    10. Input the DTC: P030000, P030027, P030085, P030100, P030200, P030300 or P030400.

    11. Check the DTC judgment result.

      Result
      Result Proceed to

      ABNORMAL

      (DTC P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 is output)

      		 A

      NORMAL

      (DTCs are not output)

      		 B

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  19. 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 HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY CONNECTOR CONNECTION) Click here

    NG

  20. INSPECT EGR VALVE ASSEMBLY


    1. Remove the EGR valve assembly Click here.

    2. Check if the EGR valve is stuck open.

      OK
      EGR valve is tightly closed.

      Tech Tips

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


    NG

    REPLACE EGR VALVE ASSEMBLY Click here

    OK

  21. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY CONNECTOR CONNECTION)


    1. Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter sub-assembly and ECM Click here.

      Tech Tips

      Repair any problems.


    NEXT

  22. CHECK WHETHER DTC OUTPUT RECURS (MISFIRE DTCS)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.

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

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

    10. Input the DTC: P030000, P030027, P030085, P030100, P030200, P030300 or P030400.

    11. Check the DTC judgment result.

      Result
      Result Proceed to

      ABNORMAL

      (DTC P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 is output)

      		 A

      NORMAL

      (DTCs are not output)

      		 B

    B

    END

    A

  23. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM)


    1. Disconnect the mass air flow meter sub-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
      D84-3 (5V) - D87-90 (VCVG) Always Below 1 Ω
      D84-1 (FG) - D87-92 (VG) Always Below 1 Ω
      D84-2 (E2G) - D87-91 (E2G) Always Below 1 Ω
      D84-3 (5V) or D87-90 (VCVG) - Body ground and other terminals Always 10 kΩ or higher
      D84-1 (FG) or D87-92 (VG) - Body ground and other terminals Always 10 kΩ or higher
      D84-2 (E2G) or D87-91 (E2G) - Body ground and other terminals Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  24. REPLACE MASS AIR FLOW METER SUB-ASSEMBLY


    1. Replace the mass air flow meter sub-assembly Click here.

      Tech Tips


      • If the results of the inspections performed in step 15 indicated no problem, proceed to the next step without replacing the mass air flow meter sub-assembly.

      • Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly Click here.


    NEXT

  25. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.

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

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

    10. Input the DTC: P030000, P030027, P030085, P030100, P030200, P030300 or P030400.

    11. Check the DTC judgment result.

      Result
      Result Proceed to

      ABNORMAL

      (DTC P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 is output)

      		 A

      NORMAL

      (DTCs are not output)

      		 B

    A

    REPLACE ECM Click here

    B

    END