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Home >> Lexus >> 2021 >> RC F Fuji Speedway Edition >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (3 Of 9) >> SFI System >> DTC P0300: Random / Multiple Cylinder Misfire Detected; DTC P0301: Cylinder 1 Misfire Detected; DTC P0302: Cylinder 2 Misfire Detected; DTC P0303: Cylinder 3 Misfire Detected; DTC P0304: Cylinder 4 Misfire Detected; DTC P0305: Cylinder 5 Misfire Detected; DTC P0306: Cylinder 6 Misfire Detected; DTC P0307: Cylinder 7 Misfire Detected; DTC P0308: Cylinder 8 Misfire Detected [09/2014 - 10/2015] >> Procedure

DTC P0300: Random / Multiple Cylinder Misfire Detected; DTC P0301: Cylinder 1 Misfire Detected; DTC P0302: Cylinder 2 Misfire Detected; DTC P0303: Cylinder 3 Misfire Detected; DTC P0304: Cylinder 4 Misfire Detected; DTC P0305: Cylinder 5 Misfire Detected; DTC P0306: Cylinder 6 Misfire Detected; DTC P0307: Cylinder 7 Misfire Detected; DTC P0308: Cylinder 8 Misfire Detected [09/2014 - 10/2015]: Procedure

  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO MISFIRE DTCS) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Trouble Codes.
    5. Read the DTCs.

      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

      HINT: 

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

    Result: 

    B 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2014 - 10/2015] 

    Result: 

    A 

    See step  2

  2. CHECK PCV HOSE CONNECTIONS 
    1. Check the PCV hose connections.

      Refer to COMPONENTS [09/2014 - ]

      OK

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

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE PCV HOSE 

    Result: 

    OK 

    See step  3

  3. READ VALUE USING TECHSTREAM (MISFIRE RPM AND MISFIRE LOAD) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Data List / Gas Misfire / Misfire RPM and Misfire Load.

      Powertrain > Engine > Data List 

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

      HINT: 

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

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. READ VALUE USING TECHSTREAM (CATALYST OT MF F/C) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Data List / Gas Misfire / Catalyst OT MF F/C.

      Powertrain > Engine > Data List 

      Tester Display
      Catalyst OT MF F/C
    5. Read the value displayed on the Techstream.

      Result

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

    Result: 

    B 

    See step  6

    Result: 

    A 

    See step  5

  5. PERFORM ACTIVE TEST USING TECHSTREAM (PROHIBIT THE CATALYST OT MISFIRE PREVENT F/C) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Active Test / Prohibit the Catalyst OT Misfire prevent F/C.

      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

    Result: 

    NEXT 

    See step  6

  6. CHECK MISFIRE COUNT OF PORT INJECTION 
    1. Connect the Techstream to the DLC3.
    2. Start the engine and warm it up.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Way / Port / Injection Way and Cylinder #1 Misfire Count to Cylinder #8 Misfire Count.

      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 Techstream. 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 Techstream (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 Techstream [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

    Result: 

    B 

    See step  15

    Result: 

    A 

    See step  7

  7. CHECK MISFIRE COUNT OF DIRECT INJECTION 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [09/2014 - ]

      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.

      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 Techstream. 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 Techstream (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 Techstream [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

      HINT: 

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

      Refer to INITIALIZATION [09/2014 - ]

    Result: 

    A 

    REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION). Refer to  REMOVAL [09/2014 - ] 

    Result: 

    B 

    See step  9

    Result: 

    C 

    See step  8

  8. CHECK MISFIRE COUNT 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [09/2014 - ]

      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.

      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 Techstream.

      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

      HINT: 

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

      Refer to INITIALIZATION [09/2014 - ]

    Result: 

    A 

    CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [09/2014 - ] 

    Result: 

    B 

    See step  16

    Result: 

    C 

    See step  24

    Result: 

    D 

    REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION). Refer to  REMOVAL [09/2014 - ] 

    Result: 

    E 

    See step  9

  9. READ VALUE USING TECHSTREAM (FUEL PRESS) 
    1. Connect the Techstream to the DLC3.
    2. Start the engine and turn the Techstream on.
    3. Enter the following menus: Powertrain / Engine / Data List / Gas General / Fuel Press.

      Powertrain > Engine > Data List 

      Tester Display
      Fuel Press
    4. Read the values.

      Standard

      Idling 

      3500 to 4500 kPag.

      2000 rpm (No load) 

      7000 to 9000 kPag.

      HINT: 

      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

    Result: 

    NG 

    See step  11

    Result: 

    OK 

    See step  10

  10. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION WAY (DIRECT)) 
    1. Connect the Techstream to the DLC3.
    2. Start the engine and turn the Techstream on.
    3. Warm up the engine.
    4. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Way / Direct / Injection Way, Short FT #1, Long FT #1, Short FT #2, Long FT #2, Fuel Pump Duty (D4) and Fuel Pump2 Duty (D4).

      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 #1
      Long FT #1
      Short FT #2
      Long FT #2

      HINT: 

      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 #1 + Long FT #1 Short FT #2 + Long FT #2
      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

      HINT: 

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

      Refer to INITIALIZATION [09/2014 - ]

    Result: 

    A 

    REPLACE FUEL DELIVERY PIPE SUB-ASSEMBLY (FUEL PRESSURE SENSOR). Refer to  REMOVAL [09/2014 - ] 

    Result: 

    B 

    REPLACE FUEL PUMP (FOR HIGH PRESSURE SIDE). Refer to  REMOVAL [09/2014 - ] 

    Result: 

    C 

    REPLACE ECM. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    D 

    REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION). Refer to  REMOVAL [09/2014 - ] 

  11. CHECK MISFIRE COUNT OF DIRECT INJECTION 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream 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.

      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 Techstream. 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 Techstream (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 Techstream [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

      HINT: 

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

      Refer to INITIALIZATION [09/2014 - ]

    Result: 

    B 

    REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION). Refer to  REMOVAL [09/2014 - ] 

    Result: 

    A 

    See step  12

  12. 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 Techstream to the DLC3.
    4. Turn the engine switch on (IG).
    5. Turn the Techstream on.
    6. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [09/2014 - ]

      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 Techstream on.
    10. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending.
    11. Read the pending DTCs.

      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

    Result: 

    B 

    REPLACE INJECTOR DRIVER (NO. 1 OR NO. 2). Refer to  REMOVAL [09/2014 - ] 

    Result: 

    A 

    See step  13

  13. REPLACE FUEL PUMP (FOR HIGH PRESSURE SIDE) 
    1. Replace the fuel pump (for high pressure side).

      Refer to REMOVAL [09/2014 - ]

      HINT: 

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

      Refer to INITIALIZATION [09/2014 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  14

  14. CHECK WHETHER DTC OUTPUT RECURS 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [09/2014 - ]

      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 Techstream 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.

      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

    Result: 

    A 

    REPLACE ECM. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    B 

    END 

  15. CHECK MISFIRE COUNT OF DIRECT INJECTION 
    1. Connect the Techstream to the DLC3.
    2. Start the engine and warm it up.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Way / Direct / Gas Misfire / Injection Way and Cylinder #1 Misfire Count to Cylinder #8 Misfire Count.

      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 Techstream. 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 Techstream (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 Techstream [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

      HINT: 

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

      Refer to INITIALIZATION [09/2014 - ]

    Result: 

    B 

    See step  24

    Result: 

    C 

    REPLACE FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION (MISFIRING CYLINDER)). Refer to  REMOVAL [09/2014 - ] 

    Result: 

    D 

    See step  39

    Result: 

    A 

    See step  16

  16. INSPECT SPARK PLUG 
    1. Inspect the spark plug of the misfiring cylinder.

      Refer to PROCEDURE - Step 3

      HINT: 

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

      Refer to INITIALIZATION [09/2014 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE SPARK PLUG. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    OK 

    See step  17

  17. CHECK FOR SPARK (SPARK TEST) 
    1. Perform a spark test.

      Refer to PROCEDURE - Step 1

      HINT: 

      • 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.

        Refer to INITIALIZATION [09/2014 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  18

  18. CHECK CYLINDER COMPRESSION PRESSURE (MALFUNCTIONING CYLINDER) 
    1. Measure the cylinder compression pressure of the misfiring cylinder.

      Refer to PROCEDURE - Step 10

      HINT: 

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

      Refer to INITIALIZATION [09/2014 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION 

    Result: 

    OK 

    See step  19

  19. CHECK VALVE CLEARANCE (MISFIRING CYLINDER) 
    1. Check the valve clearance.

      Refer to ON-VEHICLE INSPECTION [09/2014 - ]

      HINT: 

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

      Refer to INITIALIZATION [09/2014 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    ADJUST VALVE CLEARANCE. Refer to  ADJUSTMENT [09/2014 - ] 

    Result: 

    OK 

    See step  20

  20. CHECK INTAKE SYSTEM 
    1. Check the intake system for vacuum leaks.

      Refer to ON-VEHICLE INSPECTION [09/2014 - ]

      OK

      No leaks from intake system.

      HINT: 

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

      Refer to INITIALIZATION [09/2014 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE INTAKE SYSTEM 

    Result: 

    OK 

    See step  21

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

    Refer to PROCEDURE - Step 5

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    See step  37

    Result: 

    OK 

    See step  22

  22. READ VALUE USING TECHSTREAM (COOLANT TEMP) 

    Refer to PROCEDURE - Step 13

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    OK 

    See step  23

  23. READ VALUE USING TECHSTREAM (MAF) 

    Refer to PROCEDURE - Step 14

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    NG 

    See step  32

  24. CHECK INTAKE SYSTEM 
    1. Check the intake system for vacuum leaks.

      Refer to ON-VEHICLE INSPECTION [09/2014 - ]

      OK

      No leaks from intake system.

      HINT: 

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

      Refer to INITIALIZATION [09/2014 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE INTAKE SYSTEM 

    Result: 

    OK 

    See step  25

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

    Refer to PROCEDURE - Step 5

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    See step  37

    Result: 

    OK 

    See step  26

  26. READ VALUE USING TECHSTREAM (COOLANT TEMP) 

    Refer to PROCEDURE - Step 13

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    OK 

    See step  27

  27. READ VALUE USING TECHSTREAM (MAF) 

    Refer to PROCEDURE - Step 14

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    See step  32

    Result: 

    OK 

    See step  28

  28. INSPECT SPARK PLUG 
    1. Inspect the spark plug of the misfiring cylinder.

      Refer to PROCEDURE - Step 2

      HINT: 

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

      Refer to INITIALIZATION [09/2014 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE SPARK PLUG. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    OK 

    See step  29

  29. CHECK FOR SPARK (SPARK TEST) 
    1. Perform a spark test.

      Refer to PROCEDURE - Step 1

      HINT: 

      • 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.

        Refer to INITIALIZATION [09/2014 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  30

  30. CHECK CYLINDER COMPRESSION PRESSURE (MALFUNCTIONING CYLINDER) 
    1. Measure the cylinder compression pressure of the misfiring cylinder.

      Refer to PROCEDURE - Step 10

      HINT: 

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

      Refer to INITIALIZATION [09/2014 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION 

    Result: 

    OK 

    See step  31

  31. CHECK VALVE CLEARANCE (MISFIRING CYLINDER) 
    1. Check the valve clearance.

      Refer to ON-VEHICLE INSPECTION [09/2014 - ]

      HINT: 

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

      Refer to INITIALIZATION [09/2014 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    NG 

    ADJUST VALVE CLEARANCE. Refer to  ADJUSTMENT [09/2014 - ] 

  32. 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.

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [09/2014 - ]

      HINT: 

      Repair any problems.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  33

  33. CHECK WHETHER DTC OUTPUT RECURS 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [09/2014 - ]

      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 Techstream 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.

      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

    Result: 

    B 

    END 

    Result: 

    A 

    See step  34

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

    Refer to PROCEDURE - Step 4

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  35

  35. REPLACE MASS AIR FLOW METER SUB-ASSEMBLY 
    1. Replace the mass air flow meter sub-assembly.

      Refer to REMOVAL [09/2014 - ]

      HINT: 

      • If the results of the inspections performed in steps 23 and 27 indicated no problem, proceed to the next step without replacing the mass air flow meter.
      • Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.

        Refer to INITIALIZATION [09/2014 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  36

  36. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [09/2014 - ]

      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 Techstream 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.

      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

    Result: 

    A 

    END 

    Result: 

    B 

    REPLACE ECM. Refer to  REMOVAL [09/2014 - ] 

  37. 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

    Result: 

    NG 

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA 

    Result: 

    OK 

    See step  38

  38. CHECK WHETHER DTC OUTPUT RECURS 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [09/2014 - ]

      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 Techstream 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.

      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

    Result: 

    A 

    REPLACE ECM. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    B 

    CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [09/2014 - ] 

  39. CHECK FUEL PRESSURE (FOR LOW PRESSURE SIDE) 
    1. Check the fuel pressure (for low pressure side).

      Refer to PROCEDURE - Step 2

      HINT: 

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

      Refer to INITIALIZATION [09/2014 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION). Refer to  REMOVAL [09/2014 - ] 

    Result: 

    NG 

    See step  40

  40. CHECK FUEL PUMP OPERATION 
    1. Check the fuel pump operation.

      Refer to PROCEDURE - Step 1

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO FUEL PUMP CONTROL CIRCUIT. Refer to  Fuel Pump Control Circuit [09/2014 - ] 

    Result: 

    OK 

    See step  41

  41. CHECK FUEL LINE 
    1. Check the fuel line for leakage and blockage.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

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

    Result: 

    NG 

    REPAIR OR REPLACE FUEL LINE 

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