SFI SYSTEM, Diagnostic DTC:P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308

DTC Code DTC Name
P0300 Random / Multiple Cylinder Misfire Detected
P0301 Cylinder 1 Misfire Detected
P0302 Cylinder 2 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0304 Cylinder 4 Misfire Detected
P0305 Cylinder 5 Misfire Detected
P0306 Cylinder 6 Misfire Detected
P0307 Cylinder 7 Misfire Detected
P0308 Cylinder 8 Misfire Detected

DESCRIPTION

When the engine misfires, high concentrations of hydrocarbons (HC) enter the exhaust gas. Extremely high hydrocarbons concentration levels can cause an increase in exhaust emission levels. 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 sensor is used to identify any misfiring cylinders and the crankshaft position sensor 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 exceeds the threshold levels and may cause emission deterioration, the ECM illuminates the MIL and sets a DTC.

DTC No. DTC Detection Condition Trouble Area
P0300

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


  • High temperature misfire occurs in three-way catalytic converter (MIL blinks)

  • Emission deterioration misfire occurs (MIL illuminations)

  • Open or short in engine wire harness

  • Connector connection

  • Vacuum hose connections

  • Ignition system

  • Injector assembly for direct injection

  • Injector assembly for port injection

  • Fuel pressure

  • Mass air flow meter sub-assembly

  • Engine coolant temperature sensor

  • Compression pressure

  • Valve clearance

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Intake system

  • ECM

P0301

P0302

P0303

P0304

P0305

P0306

P0307

P0308

Misfiring of specific cylinder occurs and one of following conditions below is detected (2 trip detection logic):


  • High temperature misfire occurs in three-way catalytic converter (MIL blinks)

  • Emission deterioration misfire occurs (MIL illuminations)

  • Open or short in engine wire harness

  • Connector connection

  • Vacuum hose connections

  • Ignition system

  • Injector assembly for direct injector

  • Injector assembly for port injector

  • Fuel pressure

  • Mass air flow meter sub-assembly

  • Engine coolant temperature sensor

  • Compression pressure

  • Valve clearance

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Intake system

  • ECM

If DTCs that indicate misfires are set for different cylinders, but DTC P0300 is not set, it indicates that misfires have been detected in different cylinders at different times. DTC P0300 is only set when several misfiring cylinders are detected at the same time.

MONITOR DESCRIPTION

A015YIPE03

The ECM illuminates the MIL and sets a DTC when either one of the following conditions, which could cause emission deterioration, is detected (2 trip detection logic):


The ECM flashes the MIL and sets a DTC when either one of the following conditions, which could cause the three-way catalytic converter damage, is detected (2 trip detection logic):


CONFIRMATION DRIVING PATTERN


  1. Connect the intelligent tester to the DLC3.

  2. Turn the engine switch on (IG).

  3. Turn the tester ON.

  4. Record the DTCs and freeze frame data.

  5. Using the intelligent tester, switch the ECM from normal mode to check mode Click here.

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

  7. Drive the vehicle several times with the conditions, such as engine rpm and engine load, shown in Misfire RPM and Misfire Load in the Data List.

    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, using the Misfire RPM and Misfire Load in the Data List.

    Engine RPM Duration
    Idling 8 minutes or more
    1000 4 minutes or more
    2000 2 minutes or more
    3000 1.5 minute or more

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

    Tech Tips

    Do not turn the engine switch off until the stored DTCs and freeze frame data have been recorded. When the ECM returns to normal mode (default), the stored DTCs, freeze frame data and other data will be erased.

  9. Record the DTCs, freeze frame data and misfire counts.

  10. Turn the engine switch off and wait for at least 5 seconds.

INSPECTION PROCEDURE

Tech Tips


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

  • Read freeze frame data using the intelligent tester. 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.

  • 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 is used.

    3. The spark plugs have been contaminated.

    4. The problem requires further diagnosis.

  • After finishing repairs, check the misfire counts of the cylinders (Cylinder #1 Misfire Count to Cylinder #8 Misfire Count).

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

  • For 8 cylinder engine, the ECM intentionally does not set the specific misfiring cylinder DTCs at high engine speed. If misfires occur only in high engine speed areas, only DTC P0300 is set.

    In the event of DTC P0300 being present, perform the following operations:


    1. Clear the DTC Click here.

    2. Start the engine and conduct the confirmation driving pattern.

    3. Read the misfiring rates of each cylinder or DTC using the intelligent tester.

    4. Repair the cylinder that has a high misfiring rate or is indicated by the DTC.

    5. After finishing repairs, conduct the confirmation driving pattern again, in order to verify that DTC P0300 is not set.

  • When one of Short FT #1, Long FT #1, Short FT #2 or Long FT #2 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 more).

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

  • An extremely imbalanced drive wheel which causes body vibration may cause misfire DTCs to be detected.

PROCEDURE


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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester ON.

    4. Enter the following menus: Powertrain / Engine / DTC.

    5. Read the DTCs.

      Result
      Result Proceed to
      DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and/or P0308 are output A
      DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and/or P0308 and other DTCs are output B

      Tech Tips

      If any DTCs other than P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and P0308 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. READ VALUE USING INTELLIGENT TESTER (MISFIRE RPM AND MISFIRE LOAD)


    1. Connect the intelligent tester to the DLC3.

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

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

    4. 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

  3. CHECK PCV HOSE (HOSE CONNECTIONS)

    OK
    PCV hose is connected correctly and is not damaged.

    NG

    REPAIR OR REPLACE PCV HOSE Click here

    OK

  4. CHECK MISFIRE COUNT OF PORT INJECTION


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester ON.

    4. Clear the DTCs Click here.

    5. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Way / Port. (Procedure "A")

    6. Allow the engine to idle.

    7. Monitor all of the misfire count values that are displayed on the tester: Powertrain / Engine / Data List / Misfire / Cylinder #1 Misfire Count to Cylinder #8 Misfire Count.

      If no misfire counts occur for any of the cylinders, perform the following procedure: (Procedure "B")


      1. Move the gear selector lever to the D position.

      2. Repeat procedure "A" to "B" above.

      3. Monitor all of the misfire count values that are displayed on the tester.

        Result
        Misfire count Proceed to
        There are no misfire counts A
        1 or 2 cylinders have misfire counts B
        3 cylinders or more have misfire counts B

    B

    CHECK MISFIRE COUNT Click here

    A

  5. CHECK MISFIRE COUNT OF DIRECT INJECTION


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester ON.

    4. Clear the DTCs Click here.

    5. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Way / Direct. (Procedure "A")

    6. Allow the engine to idle.

    7. Monitor all of the misfire count values that are displayed on the tester.

      (1)Enter the following menus: Powertrain / Engine / Data List / Misfire / Cylinder #1 Misfire Count to Cylinder #8 Misfire Count.

      If no misfire counts occur for any of the cylinders, perform the following procedure: (Procedure "B")


      1. Move the gear selector lever to the D position.

      2. Repeat procedure "A" to "B" above.

      3. Monitor all of the misfire count values that are displayed on the tester.

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

    B

    CHECK FUEL PRESSURE SENSOR Click here

    C

    CHECK MISFIRE COUNT Click here

    A

    REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION) Click here

  6. CHECK MISFIRE COUNT


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester ON.

    4. Clear the DTCs Click here.

    5. Enter the following menus: Powertrain / Engine / Data List / All Data / Misfire RPM, Misfire Load, Cylinder #1 Misfire Count to Cylinder #8 Misfire Count and Injection Way.

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

    7. Monitor all of the misfire count values or DTCs and Injection Way displayed on the tester.

      Result
      Misfire count Injection Way 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
      1 or 2 cylinders have misfire counts Direct D
      3 cylinders or more have misfire counts Direct E

    B

    CHECK SPARK PLUG Click here

    C

    CHECK INTAKE SYSTEM Click here

    D

    REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION MALFUNCTIONING CYLINDER) Click here

    E

    CHECK FUEL PRESSURE SENSOR Click here

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

  7. CHECK MISFIRE COUNT


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester ON.

    4. Clear the DTCs Click here.

    5. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Way / Direct. (Procedure "A")

    6. Allow the engine to idle.

    7. Monitor all of the misfire count values that are displayed on the tester: Powertrain / Engine / Data List / Misfire / Cylinder #1 Misfire Count to Cylinder #8 Misfire Count.

      If no misfire counts occur for any of the cylinders, perform the following procedure: (Procedure "B")


      1. Move the gear selector lever to the D position.

      2. Repeat procedure "A" to "B" above.

      3. Monitor all of the misfire count values that are displayed on the tester.

        Result
        Misfire Count Proceed to
        Port 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

    B

    CHECK INTAKE SYSTEM Click here

    C

    REPLACE INJECTOR ASSEMBLY (FOR PORT INJECTION MALFUNCTIONING CYLINDER) Click here

    D

    CHECK FUEL PRESSURE (LOW SIDE PRESSURE) Click here

    A

  8. CHECK SPARK PLUG

    A0160T8E01

    1. Remove the ignition coil and the spark plug of the misfiring cylinder.

    2. Measure the spark plug electrode gap.

      Standard gap
      1.0 to 1.1 mm (0.0394 to 0.0433 in.)

    3. Check the electrode for carbon deposits.

      Recommended Spark Plug
      Manufacturer Product
      DENSO FK20HBR11

      Note

      If the electrode gap is larger than standard, replace the spark plug. Do not adjust the electrode gap.

    4. Reinstall the ignition coil and spark plug.


    NG

    REPLACE SPARK PLUG Click here

    OK

  9. CHECK FOR SPARK AND IGNITION


    1. Remove the ignition coils.

    2. Remove the spark plugs.

    3. Install the spark plug to the ignition coil.

    4. Disconnect the 2 fuel delivery pipe connectors.

    5. A0162JHE01

      Disconnect the 4 connectors with wire harness locks from the 2 injector drivers.

    6. Attach the spark plug assembly to the cylinder head cover.

    7. A0162NL

      Crank the engine for less than 2 seconds and check the spark.

      OK
      Sparks jump across the electrode gap.

    8. Reconnect the 4 connectors with wire harness locks to the 2 injector drivers.

    9. Reconnect the 2 fuel delivery pipe connectors.

    10. Reinstall the spark plugs and ignition coils.


    NG

    CHANGE TO NORMAL SPARK PLUG AND CHECK SPARK OF MISFIRING CYLINDER Click here

    OK

  10. CHECK CYLINDER COMPRESSION PRESSURE (MALFUNCTIONING CYLINDER))


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


    NG

    CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

    OK

  11. CHECK VALVE CLEARANCE (MISFIRING CYLINDER)


    1. Check the valve clearance Click here.


    NG

    ADJUST VALVE CLEARANCE Click here

    OK

  12. CHECK INTAKE SYSTEM


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

      OK
      No leaks from intake system.

    NG

    REPAIR OR REPLACE INTAKE SYSTEM Click here

    OK

  13. CHECK VALVE TIMING

    A015YIME02

    1. Remove the cylinder head cover bank 1 and bank 2.

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

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

      OK
      Timing marks on camshaft timing gears are aligned as shown in the illustration.

    4. Reinstall the cylinder head covers.


    NG

    ADJUST VALVE TIMING Click here

    OK

  14. CHECK FUEL PRESSURE


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


    NG

    CHECK FUEL PUMP (OPERATION) Click here

    OK

  15. READ VALUE USING INTELLIGENT TESTER (COOLANT TEMP)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester ON.

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

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

      Standard
      With cold engine
      Same as ambient air temperature.
      With warm engine
      Between 75°C and 95°C (167°F and 203°F).

    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    OK

  16. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY


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


    NG

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY Click here

    OK

    REPLACE ECM Click here

  17. CHECK INTAKE SYSTEM


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

      OK
      No leaks from intake system.

    NG

    REPAIR OR REPLACE INTAKE SYSTEM Click here

    OK

  18. CHECK VALVE TIMING

    A015YIME02

    1. Remove the cylinder head cover bank 1 and bank 2.

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

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

      OK
      Timing marks on camshaft timing gears are aligned as shown in the illustration.

    4. Reinstall the cylinder head covers.


    NG

    ADJUST VALVE TIMING Click here

    OK

  19. CHECK FUEL PRESSURE


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


    NG

    CHECK FUEL PUMP (OPERATION) Click here

    OK

  20. READ VALUE USING INTELLIGENT TESTER (COOLANT TEMP)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester ON.

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

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

      Standard
      With cold engine
      Same as ambient air temperature.
      With warm engine
      Between 75°C and 95°C (167°F and 203°F).

    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    OK

  21. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY


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


    NG

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY Click here

    OK

  22. CHECK SPARK PLUG

    A0160T8E01

    1. Remove the ignition coil and the spark plug of the misfiring cylinder.

    2. Measure the spark plug electrode gap.

      Standard gap
      1.0 to 1.1 mm (0.0394 to 0.0433 in.)

    3. Check the electrode for carbon deposits.

      Recommended Spark Plug
      Manufacturer Product
      DENSO FK20HBR11

      Note

      If the electrode gap is larger than standard, replace the spark plug. Do not adjust the electrode gap.

    4. Reinstall the ignition coil and spark plug.


    NG

    REPLACE SPARK PLUG Click here

    OK

  23. CHECK FOR SPARK AND IGNITION


    1. Remove the ignition coils.

    2. Remove the spark plugs.

    3. Install the spark plug to the ignition coil.

    4. Disconnect the 2 fuel delivery pipe connectors.

    5. A0162JHE01

      Disconnect the 4 connectors with wire harness locks from the 2 injector drivers.

    6. Attach the spark plug assembly to the cylinder head cover.

    7. A0162NL

      Crank the engine for less than 2 seconds and check the spark.

      OK
      Sparks jump across the electrode gap.

    8. Reconnect the 4 connectors with wire harness locks to the 2 injector drivers.

    9. Reconnect the 2 fuel delivery pipe connectors.

    10. Reinstall the spark plugs and ignition coils.


    NG

    CHANGE TO NORMAL SPARK PLUG AND CHECK SPARK OF MISFIRING CYLINDER Click here

    OK

  24. CHECK CYLINDER COMPRESSION PRESSURE (MALFUNCTIONING CYLINDER)


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


    NG

    CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

    OK

  25. CHECK VALVE CLEARANCE (MISFIRING CYLINDER)


    1. Check the valve clearance Click here.


    NG

    ADJUST VALVE CLEARANCE Click here

    OK

    REPLACE ECM Click here

  26. CHECK FUEL PRESSURE (LOW SIDE PRESSURE)


    1. Check the fuel pressure Click here.


    NG

    CHECK FUEL PUMP (OPERATION) Click here

    OK

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

  27. CHECK FUEL PRESSURE SENSOR


    1. Connect the intelligent tester to the DLC3.

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

    3. Start the engine.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / Fuel Press.

    5. While revving the engine, check that the fuel pressure fluctuates.

      Standard
      Idling
      3.5 to 4.5 MPa (35.7 to 45.9 kgf/cm2, 508 to 653 psi)
      2000 rpm (No load)
      7 to 9 MPa (71.4 to 91.7 kgf/cm2, 1015 to 1305 psi)

      Tech Tips

      The A/C switch and all accessory switches should be OFF, and the shift lever should be in N or P, and the engine should be fully warmed up.


    NG

    CHECK MISFIRE COUNT Click here

    OK

  28. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Start the engine and turn the tester ON.

    3. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection way / Direct.

      Tech Tips

      The A/C switch and all accessory switches should be OFF, and the shift lever should be in N or P, and the engine should be fully warmed up.

    4. Read the value.


      1. Enter the following menus: Data List / A/F Control System / Short FT #1, Long FT #1, Short FT #2, Long FT #2 and Fuel Pump Duty (D4).

        Result
        Item Proceed to
        Fuel Pump Duty (D4) Short FT #1 + Long FT #1 Short FT #2 + Long FT #2
        40% or more -20% or less -20% or less A
        10% or less +20% or more +20% or more A
        40% or more +20% or more +20% or more B
        10% or less -20% or less -20% or less C
        10% to 40% - - D

    B

    REPLACE FUEL PRESSURE SENSOR Click here

    C

    REPLACE ECM Click here

    D

    REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION MALFUNCTIONING CYLINDER) Click here

    A

    REPLACE FUEL PRESSURE SENSOR Click here

  29. CHANGE TO NORMAL SPARK PLUG AND CHECK SPARK OF MISFIRING CYLINDER


    1. Change the installed spark plug to a spark plug that functions normally.

    2. Perform a spark test.

      CAUTION:

      Always disconnect each injector connector.

      Note

      Do not crank the engine for more than 2 seconds.


      1. Install the spark plug to the ignition coil and connect the ignition coil connector.

      2. Disconnect the 2 fuel delivery pipe connectors.

      3. Disconnect the 4 connectors with wire harness locks from the 2 injector drivers.

        A0162JH

      4. Ground the spark plug.

      5. Check if sparks occur while the engine is being cranked.

        OK
        Sparks jump across the electrode gap.

    NG

    CHANGE TO NORMAL IGNITION COIL AND SPARK OF MISFIRING CYLINDER Click here

    OK

    REPLACE SPARK PLUG Click here

  30. CHANGE TO NORMAL IGNITION COIL AND SPARK OF MISFIRING CYLINDER


    1. Change the installed ignition coil to an ignition coil that functions normally.

    2. Perform a spark test.

      CAUTION:

      Always disconnect each injector connector.

      Note

      Do not crank the engine for more than 2 seconds.


      1. Install the spark plug to the ignition coil and connect the ignition coil connector.

      2. Disconnect the 2 fuel delivery pipe connectors.

      3. Disconnect the 4 connectors with wire harness locks from the 2 injector drivers.

        A0162JH

      4. Ground the spark plug.

      5. Check if sparks occur while the engine is being cranked.

        OK
        Sparks jump across the electrode gap.

    NG

    REPLACE ECM Click here

    OK

    REPLACE IGNITION COIL ASSEMBLY Click here

  31. CHECK FUEL PUMP (OPERATION)


    1. Check the fuel pump operation Click here.


    NG

    REPAIR OR REPLACE FUEL PUMP CONTROL CIRCUIT Click here

    OK

  32. CHECK FUEL LINE


    1. Check the fuel line for leakage and blockage.


    NG

    REPAIR OR REPLACE FUEL LINE

    OK

    CHECK AND REPLACE FUEL SYSTEM (FUEL PUMP REGULATOR, FUEL FILTER)

  33. CHECK MISFIRE COUNT


    1. Connect the intelligent tester to the DLC3.

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

    3. Start the engine.

    4. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Way / Direct.

    5. Allow the engine to idle.

    6. Monitor all of the misfire count values that are displayed on the tester: Powertrain / Engine / Data List / Misfire / Cylinder #1 Misfire Count to Cylinder #8 Misfire Count.

      If no misfire counts occur for any of the cylinders, perform the following procedure:


      1. Move the shift lever to D.

      2. Monitor all of the misfire count values that are displayed on the tester.

        Result
        Misfire Count Proceed to
        No misfire counts, or misfire counts occur randomly in all cylinders A
        Misfire counts occur in particular cylinder B

    B

    REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION) Click here

    A

  34. INSPECT INJECTOR DRIVER


    1. Turn the engine switch off.

    2. Replace the No. 1 and No. 2 injector drivers with normal ones from another vehicle.

      Note

      Do not disconnect and reconnect the connectors with the engine switch on (IG), as the injector driver (EDU) may be damaged.

    3. Connect the intelligent tester to the DLC3.

    4. Start the engine.

    5. Clear the DTCs Click here.

    6. Perform the driving test.

    7. Enter the following menus: Powertrain / Engine / DTC.

    8. Read the DTCs.

      Result
      Result Proceed to
      DTCs P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and/or P0308 are output A
      DTC is not output B

    B

    REPLACE INJECTOR DRIVER (NO. 1 AND NO. 2) Click here

    A

  35. INSPECT FUEL RELIEF VALVE ASSEMBLY


    1. Connect the intelligent tester to the DLC3.

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

    3. Start the engine.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / Fuel Press.

    5. Write down the Fuel Press value.

    6. Turn the engine switch off.

    7. Wait for 10 seconds.

    8. Turn the engine switch on (IG) and turn the tester ON.

    9. Enter the following menus: Powertrain / Engine / Data List / All Data / Fuel Press.

    10. Compare the Fuel Press value from and the fuel pressure value after the engine switch was turned on (IG).

      Result
      Inspection Result Proceed to
      Fuel Press value drops A
      Fuel Press value is maintained B

    B

    REPLACE FUEL RELIEF VALVE ASSEMBLY Click here

    A

    REPLACE FUEL PUMP ASSEMBLY (HIGH PRESSURE) Click here