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SFI SYSTEM(w/o Canister Pump Module), Diagnostic DTC:P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308

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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
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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. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0300 Random / Multiple Cylinder Misfire Detected

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 clearance

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Intake system

  • ECM

Comes on/Blinks* (Euro-OBD) / - (Except Euro-OBD)

*: The MIL flashes when a catalyst-damaging misfire is detected.

 DTC stored (Euro-OBD) / - (Except Euro-OBD)
P0301 Cylinder 1 Misfire Detected

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 clearance

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Intake system

  • ECM

Comes on/Blinks* (Euro-OBD) / - (Except Euro-OBD)

*: The MIL flashes when a catalyst-damaging misfire is detected.

 DTC stored (Euro-OBD) / - (Except Euro-OBD)
P0302 Cylinder 2 Misfire Detected

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 clearance

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Intake system

  • ECM

Comes on/Blinks* (Euro-OBD) / - (Except Euro-OBD)

*: The MIL flashes when a catalyst-damaging misfire is detected.

 DTC stored (Euro-OBD) / - (Except Euro-OBD)
P0303 Cylinder 3 Misfire Detected

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 clearance

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Intake system

  • ECM

Comes on/Blinks* (Euro-OBD) / - (Except Euro-OBD)

*: The MIL flashes when a catalyst-damaging misfire is detected.

 DTC stored (Euro-OBD) / - (Except Euro-OBD)
P0304 Cylinder 4 Misfire Detected

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 clearance

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Intake system

  • ECM

Comes on/Blinks* (Euro-OBD) / - (Except Euro-OBD)

*: The MIL flashes when a catalyst-damaging misfire is detected.

 DTC stored (Euro-OBD) / - (Except Euro-OBD)
P0305 Cylinder 5 Misfire Detected

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 clearance

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Intake system

  • ECM

Comes on/Blinks* (Euro-OBD) / - (Except Euro-OBD)

*: The MIL flashes when a catalyst-damaging misfire is detected.

 DTC stored (Euro-OBD) / - (Except Euro-OBD)
P0306 Cylinder 6 Misfire Detected

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 clearance

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Intake system

  • ECM

Comes on/Blinks* (Euro-OBD) / - (Except Euro-OBD)

*: The MIL flashes when a catalyst-damaging misfire is detected.

 DTC stored (Euro-OBD) / - (Except Euro-OBD)
P0307 Cylinder 7 Misfire Detected

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 clearance

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Intake system

  • ECM

Comes on/Blinks* (Euro-OBD) / - (Except Euro-OBD)

*: The MIL flashes when a catalyst-damaging misfire is detected.

 DTC stored (Euro-OBD) / - (Except Euro-OBD)
P0308 Cylinder 8 Misfire Detected

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 clearance

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Intake system

  • ECM

Comes on/Blinks* (Euro-OBD) / - (Except Euro-OBD)

*: The MIL flashes when a catalyst-damaging misfire is detected.

 DTC stored (Euro-OBD) / - (Except Euro-OBD)

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

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MONITOR DESCRIPTION

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


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MONITOR STRATEGY

Required Sensors/Components (Main)

Crankshaft position sensor

Camshaft position sensor

VVT sensor
Required Sensors/Components (Related)

Engine coolant temperature

Intake air temperature sensor

Mass air flow meter sub-assembly
Frequency of Operation Continuous
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TYPICAL ENABLING CONDITIONS

Table 1. Misfire
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)
Table 2. Monitor Period of Emission-related Misfire
First 1000 revolutions after engine start, or during check mode Crankshaft 1000 revolutions
Except above Crankshaft 1000 revolutions x 4
Table 3. Monitor Period of Catalyst-damaging Misfire (MIL Blinks)
All of the following conditions 1, 2, 3 and 4 are met Crankshaft 200 revolutions x 3
Except above (MIL blinks immediately) Crankshaft 200 revolutions
1. Driving cycles 1st
2. Check mode Off
3. Engine speed Less than 2200 rpm
4. Engine load Less than 55%
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TYPICAL MALFUNCTION THRESHOLDS

Table 4. Monitor Period of Emission-related Misfire
Misfire rate 3.7% or more
Table 5. Monitor Period of Catalyst-damaging Misfire (MIL Blinks)
Number of misfires per 200 revolutions 120 or more (varies with intake air amount and engine speed)
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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. Read the misfire counts of each cylinder, Cylinder #1 Misfire Count to Cylinder #8 Misfire Count, with the engine idling. If any misfire count is displayed, skip the following confirmation driving pattern.

  8. 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.

    Tip:

    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 8.0 minutes or more
    1000 4.5 minutes or more
    2000 2.5 minutes or more
    3000 1.5 minutes or more

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

    Tip:

    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.

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

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

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

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WIRING DIAGRAM

Refer to DTC P0102 for the mass air flow meter sub-assembly circuit.

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CAUTION / NOTICE / HINT

Note:

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

Tip:

  • Check the "Fuel Cut Elps 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.

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

  • 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.

  • 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 (Cylinder #1 Misfire Count to Cylinder #8 Misfire Count).

  • Be sure to confirm that no misfiring cylinder DTCs are stored again by performing 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 DTCs.

      Click here

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

    3. Read the misfiring counts of each cylinder or DTC(s) using the GTS.

    4. Repair the cylinder(s) 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 B1S1, Long FT B1S1, Short FT B2S1 or Long FT B2S1 in the freeze frame data is outside the range of +/-15%, the air fuel ratio may be rich (-15% or less) or lean (+15% or higher).

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

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

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PROCEDURE


  1. Click here

    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.


      1. Powertrain > Engine > Trouble Codes


      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
      Tip:

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


  2. Click here

    CHECK PCV HOSE CONNECTIONS


    1. Check the PCV hose connections.

      Click here

      OK
      PCV valve and hose are correctly connected and are not damaged.
      Result
      Proceed to
      OK
      NG

  3. Click here

    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.


      1. Powertrain > Engine > Data List
        Tester Display
        Misfire RPM
        Misfire Load





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

      Tip:

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

      Result
      Proceed to
      NEXT

  4. Click here

    READ VALUE USING GTS (CATALYST OT MF F/C)


    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 / Catalyst OT MF F/C.


      1. Powertrain > Engine > Data List
        Tester Display
        Catalyst OT MF F/C




    5. Read the value displayed on the GTS.

      Result
      Data List Result Proceed to
      Catalyst OT MF F/C Avail A
      Not Avl B

  5. Click here

    PERFORM ACTIVE TEST USING GTS (PROHIBIT THE CATALYST OT MISFIRE PREVENT F/C)


    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 / Active Test / Prohibit the Catalyst OT Misfire prevent F/C.


      1. Powertrain > Engine > Active Test
        Tester Display
        Prohibit the Catalyst OT Misfire prevent F/C




    5. Perform the Active Test.

      Note:

      When performing the Active Test, make sure the vehicle is stopped and the engine is either idling or being revved within 3000 rpm.

      Result
      Proceed to
      NEXT

  6. Click here

    CHECK MISFIRE COUNT OF PORT INJECTION


    1. Connect the GTS to the DLC3.

    2. Start the engine and warm it up.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Way / Port / All Data / Injection Way and Cylinder #1 Misfire Count to Cylinder #8 Misfire Count.


      1. Powertrain > Engine > Active Test
        Active Test Display
        Control the Injection Way
        Data List Display
        Injection Way
        Cylinder #1 Misfire Count
        Cylinder #2 Misfire Count
        Cylinder #3 Misfire Count
        Cylinder #4 Misfire Count
        Cylinder #5 Misfire Count
        Cylinder #6 Misfire Count
        Cylinder #7 Misfire Count
        Cylinder #8 Misfire Count













    5. Allow the engine to idle.

    6. Read each value for Cylinder #1 Misfire Count to Cylinder #8 Misfire Count and Injection Way 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 Way and Cylinder #1 Misfire Count to Cylinder #8 Misfire Count or DTCs displayed on the GTS [B].

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

  7. Click here

    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. Clear the DTCs.

      Click here


      1. Powertrain > Engine > Clear DTCs


    5. Start the engine and warm it up.

    6. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Way / Direct / Injection Way and Cylinder #1 Misfire Count to Cylinder #8 Misfire Count.


      1. Powertrain > Engine > Active Test
        Active Test Display
        Control the Injection Way
        Data List Display
        Injection Way
        Cylinder #1 Misfire Count
        Cylinder #2 Misfire Count
        Cylinder #3 Misfire Count
        Cylinder #4 Misfire Count
        Cylinder #5 Misfire Count
        Cylinder #6 Misfire Count
        Cylinder #7 Misfire Count
        Cylinder #8 Misfire Count













    7. Allow the engine to idle.

    8. Read each value for Cylinder #1 Misfire Count to Cylinder #8 Misfire Count and Injection Way 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 Way and Cylinder #1 Misfire Count to Cylinder #8 Misfire Count or DTCs displayed on the GTS [B].

        Result
        Misfire Count Proceed to
        Port (Result of step 6) 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
        Tip:

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

        Click here


  8. Click here

    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.

      Click here


      1. Powertrain > Engine > Clear DTCs


    5. Start the engine and warm it up.

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


      1. Powertrain > Engine > Data List
        Tester Display
        Injection Way
        Cylinder #1 Misfire Count
        Cylinder #2 Misfire Count
        Cylinder #3 Misfire Count
        Cylinder #4 Misfire Count
        Cylinder #5 Misfire Count
        Cylinder #6 Misfire Count
        Cylinder #7 Misfire Count
        Cylinder #8 Misfire Count
        Misfire RPM
        Misfire Load














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

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

      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
      Tip:

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

      Click here


  9. Click here

    READ VALUE USING GTS (FUEL PRESS)


    1. Connect the GTS to the DLC3.

    2. Start the engine and turn the GTS on.

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


      1. Powertrain > Engine > Data List
        Tester Display
        Fuel Press




    4. Read the values.

      Standard
      Idling
      3500 to 4500 kPag.
      2000 rpm (No load)
      2500 to 4500 kPag.
      Tip:

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

      Result
      Proceed to
      OK
      NG

  10. Click here

    PERFORM ACTIVE TEST USING GTS (CONTROL THE INJECTION WAY (DIRECT))


    1. Connect the GTS to the DLC3.

    2. Start the engine and turn the GTS on.

    3. Warm up the engine.

    4. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Way / Direct / Injection Way, Short FT B1S1, Long FT B1S1, Short FT B2S1, Long FT B2S1, Fuel Pump Duty (D4) and Fuel Pump2 Duty (D4).


      1. Powertrain > Engine > Active Test
        Active Test Display
        Control the Injection Way
        Data List Display
        Fuel Pump Duty (D4)
        Fuel Pump2 Duty (D4)
        Injection Way
        Short FT B1S1
        Long FT B1S1
        Short FT B2S1
        Long FT B2S1











      Tip:

      The A/C switch and all accessory switches should be off, and the transmission gear selector lever should be in the P position, and the engine should be fully warmed up.

    5. Read the value.

      Result
      Item Proceed to
      Fuel Pump Duty (D4) Fuel Pump2 Duty (D4) Short FT B1S1 + Long FT B1S1 Short FT B2S1 + Long FT B2S1
      40% or more 40% or more -20% or less -20% or less A
      10% or less 10% or less +20% or more +20% or more
      40% or more 40% or more +20% or more +20% or more B
      10% or less 10% or less -20% or less -20% or less C
      10% to 40% 10% to 40% - - D
      Tip:

      Perform "Inspection After Repair" after replacing the fuel pump (for high pressure side) or fuel injector assembly (for direct injection).

      Click here


    • A

      REPLACE FUEL DELIVERY PIPE SUB-ASSEMBLY (FUEL PRESSURE SENSOR)Click here

    • B

      REPLACE FUEL PUMP (FOR HIGH PRESSURE SIDE)Click here

    • C

      REPLACE ECMClick here

    • D

      REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION)Click here

  11. Click here

    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 Way / Direct / Injection Way and Cylinder #1 Misfire Count to Cylinder #8 Misfire Count.


      1. Powertrain > Engine > Active Test
        Active Test Display
        Control the Injection Way
        Data List Display
        Injection Way
        Cylinder #1 Misfire Count
        Cylinder #2 Misfire Count
        Cylinder #3 Misfire Count
        Cylinder #4 Misfire Count
        Cylinder #5 Misfire Count
        Cylinder #6 Misfire Count
        Cylinder #7 Misfire Count
        Cylinder #8 Misfire Count













    6. Allow the engine to idle.

    7. Read each value for Cylinder #1 Misfire Count to Cylinder #8 Misfire Count and Injection Way 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 Way and Cylinder #1 Misfire Count to Cylinder #8 Misfire Count or DTCs displayed on the GTS [B].

        Result
        Injection Way Misfire Count Proceed to
        Direct No misfire counts, or misfire counts occur randomly in all cylinders A
        Misfire counts occur in particular cylinder B
        Tip:

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

        Click here


  12. Click here

    INSPECT INJECTOR DRIVER (NO. 1 AND NO. 2)


    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 GTS to the DLC3.

    4. Turn the engine switch on (IG).

    5. Turn the GTS on.

    6. Clear the DTCs.

      Click here


      1. Powertrain > Engine > Clear DTCs


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

    8. Start the engine and warm it up.

    9. Turn the GTS on.

    10. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending.

    11. Read the pending DTCs.


      1. Powertrain > Engine > Trouble Codes


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

  13. Click here

    REPLACE FUEL PUMP (FOR HIGH PRESSURE SIDE)


    1. Replace the fuel pump (for high pressure side).

      Click here

      Tip:

      Perform "Inspection After Repair" after replacing the fuel pump (for high pressure side).

      Click here

      Result
      Proceed to
      NEXT

  14. Click here

    CHECK WHETHER DTC OUTPUT RECURS


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.

      Click here


      1. Powertrain > Engine > Clear DTCs


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

    6. Start the engine and warm it up.

    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.


      1. Powertrain > Engine > Utility
        Tester Display
        All Readiness




    10. Input the DTC: P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 or P0308.

    11. Check the DTC judgment result.

      Result
      Result Proceed to

      ABNORMAL

      (DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and/or P0308 are output)

      		 A

      NORMAL

      (DTCs are not output)

      		 B

  15. Click here

    CHECK MISFIRE COUNT OF DIRECT INJECTION


    1. Connect the GTS to the DLC3.

    2. Start the engine and warm it up.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Way / Direct / All Data / Injection Way and Cylinder #1 Misfire Count to Cylinder #8 Misfire Count.


      1. Powertrain > Engine > Active Test
        Active Test Display
        Control the Injection Way
        Data List Display
        Injection Way
        Cylinder #1 Misfire Count
        Cylinder #2 Misfire Count
        Cylinder #3 Misfire Count
        Cylinder #4 Misfire Count
        Cylinder #5 Misfire Count
        Cylinder #6 Misfire Count
        Cylinder #7 Misfire Count
        Cylinder #8 Misfire Count













    5. Allow the engine to idle.

    6. Read each value for Cylinder #1 Misfire Count to Cylinder #8 Misfire Count and Injection Way 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 Way and Cylinder #1 Misfire Count to Cylinder #8 Misfire Count or DTCs displayed on the GTS [B].

        Result
        Misfire Count Proceed to
        Port (Result of step 6) 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
        Tip:

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

        Click here


  16. Click here

    INSPECT SPARK PLUG


    1. Inspect the spark plug of the misfiring cylinder.

      Click here

      Tip:

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

      Click here

      Result
      Proceed to
      OK
      NG

  17. Click here

    CHECK FOR SPARK (SPARK TEST)


    1. Perform a spark test.

      Click here

      Tip:

      • 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

      Result
      Proceed to
      NEXT

  18. Click here

    CHECK CYLINDER COMPRESSION PRESSURE (MALFUNCTIONING CYLINDER)


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

      Click here

      Tip:

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

      Click here

      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

  19. Click here

    CHECK VALVE CLEARANCE (MISFIRING CYLINDER)


    1. Check the valve clearance.

      Click here

      Tip:

      Perform "Inspection After Repair" after adjusting the valve timing.

      Click here

      Result
      Proceed to
      OK
      NG

  20. Click here

    CHECK INTAKE SYSTEM


    1. Check the intake system for vacuum leaks.

      Click here

      OK
      No leaks from intake system.
      Tip:

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

      Click here

      Result
      Proceed to
      OK
      NG

  21. *a Timing Mark *b Approximately 68° *c Approximately 16° *d Approximately 32° *e Approximately 50° - -
    Click here

    CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN)

    Result
    Proceed to
    OK
    NG

    1. Remove the cylinder head covers.

    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
      The timing marks on the camshaft timing gears are aligned as shown in the illustration.
      Tip:

      • 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.

      • When checking the valve timing, make sure the camshaft timing gear assemblies are set to the most retarded position and the camshaft timing exhaust gear assemblies are set to the most advanced position. When the VVT system is normal and the engine is stopped, the camshaft timing gear assemblies stop at the center of their operation range and the camshaft timing exhaust gear assemblies stop at the most advanced position.

      Result
      Proceed to
      OK
      NG

  22. Click here

    READ VALUE USING GTS (COOLANT TEMP)

    Result
    Proceed to
    OK
    NG

    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 Temp.


      1. Powertrain > Engine > Data List
        Tester Display
        Coolant Temp




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

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

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

      Click here

      Result
      Proceed to
      OK
      NG

  23. Click here

    READ VALUE USING GTS (MAF)

    Result
    Proceed to
    OK
    NG

    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / MAF, Coolant Temp and Engine Speed.


      1. Powertrain > Engine > Data List
        Tester Display
        Engine Speed
        MAF
        Coolant Temp






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

    6. Read MAF with the engine speed at 3000 rpm.

      Standard
      GTS Display Condition Specified Condition
      MAF

      Shift lever position: P

      A/C: Off

      Engine Speed: 3000 rpm

      		 Between 17.0 gm/sec and 23.0 gm/sec
      Result
      Proceed to
      OK
      NG

  24. Click here

    CHECK INTAKE SYSTEM


    1. Check the intake system for vacuum leaks.

      Click here

      OK
      No leaks from intake system.
      Tip:

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

      Click here

      Result
      Proceed to
      OK
      NG

  25. *a Timing Mark *b Approximately 68° *c Approximately 16° *d Approximately 32° *e Approximately 50° - -
    Click here

    CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN)

    Result
    Proceed to
    OK
    NG

    1. Remove the cylinder head covers.

    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
      The timing marks on the camshaft timing gears are aligned as shown in the illustration.
      Tip:

      • 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.

      • When checking the valve timing, make sure the camshaft timing gear assemblies are set to the most retarded position and the camshaft timing exhaust gear assemblies are set to the most advanced position. When the VVT system is normal and the engine is stopped, the camshaft timing gear assemblies stop at the center of their operation range and the camshaft timing exhaust gear assemblies stop at the most advanced position.

      Result
      Proceed to
      OK
      NG

  26. Click here

    READ VALUE USING GTS (COOLANT TEMP)

    Result
    Proceed to
    OK
    NG

    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 Temp.


      1. Powertrain > Engine > Data List
        Tester Display
        Coolant Temp




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

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

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

      Click here

      Result
      Proceed to
      OK
      NG

  27. Click here

    READ VALUE USING GTS (MAF)

    Result
    Proceed to
    OK
    NG

    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / MAF, Coolant Temp and Engine Speed.


      1. Powertrain > Engine > Data List
        Tester Display
        Engine Speed
        MAF
        Coolant Temp






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

    6. Read MAF with the engine speed at 3000 rpm.

      Standard
      GTS Display Condition Specified Condition
      MAF

      Shift lever position: P

      A/C: Off

      Engine Speed: 3000 rpm

      		 Between 17.0 gm/sec and 23.0 gm/sec
      Result
      Proceed to
      OK
      NG

  28. Click here

    INSPECT SPARK PLUG


    1. Inspect the spark plug of the misfiring cylinder.

      Click here

      Tip:

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

      Click here

      Result
      Proceed to
      OK
      NG

  29. Click here

    CHECK FOR SPARK (SPARK TEST)


    1. Perform a spark test.

      Click here

      Tip:

      • 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

      Result
      Proceed to
      NEXT

  30. Click here

    CHECK CYLINDER COMPRESSION PRESSURE (MALFUNCTIONING CYLINDER)


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

      Click here

      Tip:

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

      Click here

      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

  31. Click here

    CHECK VALVE CLEARANCE (MISFIRING CYLINDER)


    1. Check the valve clearance.

      Click here

      Tip:

      Perform "Inspection After Repair" after adjusting the valve timing.

      Click here

      Result
      Proceed to
      OK
      NG

  32. Click here

    CHECK FOR HARNESS AND CONNECTOR (MASS AIR FLOW METER CONNECTOR CONNECTION)


    1. Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter and ECM.

      Click here

      Tip:

      Repair any problems.

      Result
      Proceed to
      NEXT

  33. Click here

    CHECK WHETHER DTC OUTPUT RECURS


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.

      Click here


      1. Powertrain > Engine > Clear DTCs


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

    6. Start the engine and warm it up.

    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.


      1. Powertrain > Engine > Utility
        Tester Display
        All Readiness




    10. Input the DTC: P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 or P0308.

    11. Check the DTC judgment result.

      Result
      Result Proceed to

      ABNORMAL

      (DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and/or P0308 are output)

      		 A

      NORMAL

      (DTCs are not output)

      		 B

  34. Click here

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

    Result
    Proceed to
    OK
    NG

    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
      F1-21 (VCVG) - F39-3 (5V) Always Below 1 Ω
      F1-23 (VG) - F39-1 (FG) Always Below 1 Ω
      F1-24 (E2G) - F39-2 (E2G) Always Below 1 Ω
      F1-21 (VCVG) or F39-3 (5V) - Body ground Always 10 kΩ or higher
      F1-23 (VG) or F39-1 (FG) - Body ground Always 10 kΩ or higher
      F1-24 (E2G) or F39-2 (E2G) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  35. Click here

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY


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

      Click here

      Tip:

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

      Click here

      Result
      Proceed to
      NEXT

  36. Click here

    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.

      Click here


      1. Powertrain > Engine > Clear DTCs


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

    6. Start the engine and warm it up.

    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.


      1. Powertrain > Engine > Utility
        Tester Display
        All Readiness




    10. Input the DTC: P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 or P0308.

    11. Check the DTC judgment result.

      Result
      Result Proceed to

      NORMAL

      (DTCs are not output)

      		 A

      ABNORMAL

      (DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and/or P0308 are output)

      		 B

  37. Click here

    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.

      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

  38. Click here

    CHECK WHETHER DTC OUTPUT RECURS


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.

      Click here


      1. Powertrain > Engine > Clear DTCs


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

    6. Start the engine and warm it up.

    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.


      1. Powertrain > Engine > Utility
        Tester Display
        All Readiness




    10. Input the DTC: P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 or P0308.

    11. Check the DTC judgment result.

      Result
      Result Proceed to

      ABNORMAL

      (DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and/or P0308 are output)

      		 A

      NORMAL

      (DTCs are not output)

      		 B

  39. Click here

    CHECK FUEL PRESSURE (FOR LOW PRESSURE SIDE)


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

      Click here

      Tip:

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

      Click here

      Result
      Proceed to
      OK
      NG

  40. Click here

    CHECK FUEL PUMP OPERATION


    1. Check the fuel pump operation.

      Click here

      Result
      Proceed to
      OK
      NG

  41. Click here

    CHECK FUEL LINE


    1. Check the fuel line for leakage and blockage.

      Result
      Proceed to
      OK
      NG

    • OK

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

    • NG

      REPAIR OR REPLACE FUEL LINE