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. Remove the inlet No. 1 air cleaner Click here.

    4. Remove the air cleaner cap sub-assembly Click here.

    5. Remove the air cleaner case sub-assembly Click here.

    6. A01VKB7

      Disconnect the 4 injector connectors.

    7. Install the air cleaner case sub-assembly Click here.

    8. Install the air cleaner cap sub-assembly Click here.

    9. Install the inlet No. 1 air cleaner Click here.

    10. A01VKS2

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

    11. Ground the spark plug.

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

    13. Check whether sparks occur.

      Note


      • Ground the spark plugs when checking them.

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


        • For vehicles with the cranking holding control system, cranking will not stop unless the ignition switch is turned to OFF.

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

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

  2. INSPECT IGNITION COIL AND SPARK TEST


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


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

        Result
        Result Proceed to
        NG Connect securely
        OK Go to next step

      2. Perform a spark test on each ignition coil with igniter.


        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 with igniter
          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

          Ignition Circuit Click here

    2. Connect the 4 injector connectors.

    3. Install the ignition coil and spark plug Click here.

    4. Clear the DTCs Click here.

    5. 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


    • Do not use a wire brush for cleaning.

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


    1. A01VHVIE69
      Text in Illustration
      *a Ground

      Check the electrode using a megohmmeter:


      1. Using a megohmmeter, measure the insulation resistance.

        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. A01VGKO

      Alternative inspection method:


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

      2. Remove the spark plug.

      3. 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.

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

      If there is any damage, replace the spark plug.

      Recommended Spark Plug
      Manufacturer Spark Plug Type
      DENSO SC20HR11
    4. A01VI7AE47
      Text in Illustration
      *a Electrode gap

      Reference:


      1. Check the spark plug electrode gap.

        Maximum Electrode Gap for a Used Spark Plug
        1.3 mm (0.0512 in.)

        If the gap is more than the maximum, replace the spark plug.

        Electrode Gap for a New Spark Plug
        1.0 to 1.1 mm (0.0394 to 0.0433 in.)

        Note

        Never attempt to adjust the gap of a used plug.

    5. A01VLD3

      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 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.