IGNITION SYSTEM ON-VEHICLE INSPECTION

PROCEDURE


  1. PERFORM SPARK TEST


    1. Check for DTCs Click here.

      Note

      If any DTC is present, perform troubleshooting in accordance with the procedure for that DTC.

    2. Remove the 4 ignition coils and 4 spark plugs Click here.

    3. Hoist the engine assembly up with an engine sling device and a mini crane.

    4. A004HJHE02

      Remove the SST.

      SST
      09250-53010
    5. A004IS8

      Install the 2 nuts.

      Torque:
      60 N*m  { 612 kgf*cm, 44 ft.*lbf }
    6. for Resin Intake Manifold:


      1. A004K56

        Remove the 2 bolts and injector cover (for bank 1).

    7. for Aluminum Intake Manifold:


      1. A004KIL

        Remove the 2 bolts and disengage the 2 guides, and then remove the injector cover (for bank 1).

    8. A004JP0

      Disconnect the 2 fuel injector connectors.

    9. for Resin Intake Manifold:


      1. A004K56

        Install the injector cover (for bank 1) with the 2 bolts.

        Torque:
        19 N*m  { 194 kgf*cm, 14 ft.*lbf }
    10. for Aluminum Intake Manifold:


      1. A004KIL

        Engage the 2 guides and install the injector cover (for bank 1) with the 2 bolts.

        Torque:
        19 N*m  { 194 kgf*cm, 14 ft.*lbf }
    11. A004JBB

      Install the injector driver with the 3 bolts.

      Torque:
      6.4 N*m  { 65 kgf*cm, 57 in.*lbf }

      Tech Tips

      Do not connect the upper side 2 connectors.

    12. A004JFF

      Disconnect the 2 fuel injector connectors.

    13. Connect the cable to the negative battery terminal.

    14. Install the air cleaner case sub-assembly with the hose.

    15. Install a spark plug to each ignition coil and connect the ignition coil connector.

    16. Ground the spark plug.

    17. Check that spark occurs while the engine is being cranked.

    18. Check whether sparks occur.

      Note


      • Ground the spark plugs when checking them.

      • Do not crank the engine for more than 2 seconds.

      • Do not use an ignition coil and spark plug that has been dropped or subjected to a strong impact.

      • In vehicles with entry and start system, the cranking hold system means that if the engine does not start, then cranking is will continue for a specified time. To stop cranking, press the engine switch again.

    19. If spark does not occur, perform the following procedure.

  2. INSPECT IGNITION COIL AND SPARK PLUG


    1. Perform the spark test in accordance with the following procedure.


      1. Check that the wire harness side connector of the ignition coil assembly is securely connected.

        Result
        Result Proceed to
        NG Connect securely
        OK Go to next step
      2. Perform a spark test on each ignition coil assembly.


        1. If there is a cylinder where sparks do not occur, replace its ignition coil with the ignition coil of a cylinder where sparks occur normally.

        2. Crank the engine and visually check that sparks occur at the cylinder with the normally operating ignition coil.

          Result
          Result Proceed to
          OK Replace ignition coil assembly
          NG Go to next step
      3. Perform a spark test on each spark plug.


        1. If there is a cylinder where sparks do not occur, replace its spark plug with the spark plug of a cylinder where sparks occur normally.

        2. Crank the engine and visually check that sparks occur at the cylinder with the normally operating spark plug.

          Result
          Result Proceed to
          OK Replace spark plug
          NG

          Inspect the ignition system Click here

    2. Disconnect the cable from the negative battery terminal.

    3. Remove the air cleaner case sub-assembly with hose.

    4. A004JBB

      Remove the 3 bolts and the injector driver.

    5. for Resin Intake Manifold:


      1. A004K56

        Remove the 2 bolts and injector cover (for bank 1).

    6. for Aluminum Intake Manifold:


      1. A004KIL

        Remove the 2 bolts and disengage the 2 guides, and then remove the injector cover (for bank 1).

    7. A004JP0

      Connect the 2 fuel injector connectors.

    8. for Resin Intake Manifold:


      1. A004K56

        Install the injector cover (for bank 1) with the 2 bolts.

        Torque:
        19 N*m  { 194 kgf*cm, 14 ft.*lbf }
    9. for Aluminum Intake Manifold:


      1. A004KIL

        Engage the 2 guides and install the injector cover (for bank 1) with the 2 bolts.

        Torque:
        19 N*m  { 194 kgf*cm, 14 ft.*lbf }
    10. A004JBB

      Install the injector driver with the 3 bolts.

      Torque:
      6.4 N*m  { 65 kgf*cm, 57 in.*lbf }

      Tech Tips

      Do not connect the upper side 2 connectors.

    11. A004J9IE04
      Text in Illustration
      *1 Lock Lever
      A004I9S Connector with Lock Lever
      A004KUZ Connector without Lock Lever

      Connect the 4 connectors to the injector driver. Move the lock levers in the direction indicated by the arrow to lock the 3 connectors.

    12. A004JFF

      Connect the 2 fuel injector connectors.

    13. for Resin Intake Manifold:


      1. A004J75

        Install the injector cover (for bank 2) with the 2 bolts.

        Torque:
        19 N*m  { 194 kgf*cm, 14 ft.*lbf }
    14. for Aluminum Intake Manifold:


      1. A004IEH

        Engage the 2 guides and install the injector cover (for bank 2) with the 2 bolts.

        Torque:
        19 N*m  { 194 kgf*cm, 14 ft.*lbf }
    15. A004IS8

      Remove the 2 nuts.

    16. Hoist the engine assembly up with an engine sling device and a mini crane.

    17. A004HJHE02

      Install the SST.

      SST
      09250-53010
    18. Install the ignition coil assembly and spark plug Click here.

    19. Clear the DTCs Click here.

    20. Check for DTCs Click here.

      Tech Tips

      Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

  3. INSPECT SPARK PLUG

    Note


    • When replacing a spark plug, make sure to use the designated spark plug because an ion current type misfire detection system is used for the spark plug.

    • Do not damage the platinum tip. If the spark plug has been dropped, make sure to replace it with a designated new spark plug.

    • Do not use a wire brush for cleaning.

    • Do not attempt to adjust the electrode gap of a used spark plug.

    • Make sure to use SST to check gaps, preventing the platinum tip from being damaged.

    • If damaged, replace it with a designated new spark plug.


    1. A004IAEE01
      Text in Illustration
      *a Ground

      Check the electrode using a megohmmeter:


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

        Standard Insulation Resistance
        Tester Connection Condition Specified Condition
        Spark plug (terminal part) - Body ground Always 10 MΩ or higher

        Tech Tips


        • If the result is not as specified, clean the spark plug with a spark plug cleaner and measure the resistance again.

        • If a megohmmeter is not available, perform the following simple inspection instead.

    2. Alternative inspection method:


      1. Quickly accelerate the engine to 4000 rpm 5 times.

      2. Remove the spark plug Click here.

      3. A004I5BE02
        Text in Illustration
        *a Correct
        *b Incorrect

        Visually check the spark plug.

        If the electrode is dry, the spark plug is functioning properly. If the electrode is damp, proceed to the next step.

        Tech Tips

        If a megohmmeter is not available, perform the following simple inspection instead.

      4. Install the spark plug Click here.

    3. Check the spark plug for any damage to its threads and insulator.

      Tech Tips

      If there is any damage, replace the spark plug.

      Recommended Spark Plug
      Manufacturer Product
      DENSO made ZXE27HBR8
    4. Reference:


      1. A004IQ2E02
        Text in Illustration
        *a Spark Plug Electrode Gap

        Using SST, check the spark plug electrode gap.

        SST
        09240-00020
        Maximum electrode gap for a used spark plug
        1.0 mm (0.0394 in.)
        If the gap exceeds the maximum, replace the spark plug.

        Note

        Never attempt to adjust the gap of a used plug.

        Electrode gap for a new spark plug
        0.7 to 0.8 mm (0.0276 to 0.0315 in.)
    5. Clean the spark plugs.

      If the electrode has traces of wet carbon, clean the electrode with a spark plug cleaner and then dry it.

      Standard air pressure
      588 kPa (6.0 kgf/cm2, 85 psi)
      Standard duration
      20 seconds or less

      Tech Tips

      Only use a spark plug cleaner when the electrode is free of oil. If the electrode has traces of oil, use gasoline to clean off the oil before using the spark plug cleaner.