IGNITION SYSTEM ON-VEHICLE INSPECTION


  1. PERFORM SPARK TEST


    1. Check for DTCs Click here.

      Note

      If any DTC is output, perform troubleshooting procedures for that DTC.

    2. Remove the ignition coil assemblies and spark plugs Click here.

    3. A01EVZD

      Disconnect the 4 injector connectors.

    4. Install the spark plug into the ignition coil assembly, and then connect the ignition coil connector.

    5. A01EUTS

      Ground the spark plug.

    6. Check that spark occurs at each spark plug while the engine is being cranked.

      Note


      • Be sure to ground the spark plugs when checking them.

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

        Cranking will stop if the engine switch is pushed again for models with cranking holding function.

      • If a spark plug has been struck or dropped, replace it.

      • If an ignition coil assembly has been struck or dropped, replace it.

      Tech Tips

      If spark does not occur for any cylinder, perform the following Inspect Ignition Coil and Spark Test procedure.

    7. Connect the 4 fuel injector connectors.

    8. Install the spark plugs and ignition coil assemblies Click here.

    9. Check for DTCs Click here.

    10. Clear the DTCs Click here.

  2. INSPECT IGNITION COIL AND SPARK TEST

    Tech Tips

    Perform "Inspection After Repair" after replacing the spark plug and ignition coil assembly Click here.


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

      Result
      Result Action
      NG Connect securely
      OK Go to next step

    2. Perform a spark test on each ignition coil assembly.


      1. Replace the ignition coil assembly with a known good one.

      2. Perform the spark test again.

        Result
        Result Action
        NG Go to next step
        OK Replace ignition coil assembly

    3. Perform a spark test on each spark plug.


      1. Replace the spark plug with a known good one.

      2. Perform the spark test again.

        Result
        Result Action
        NG

        Inspect the ignition system Click here.
        OK Replace spark plug

  3. CHECK SPARK PLUG

    Note


    • Do not use a wire brush for cleaning.

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

    Tech Tips

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


    1. A01EYGVE41
      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. A01EW5Y

      Alternative inspection method:


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

      2. Remove the spark plug Click here.

      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.

      4. Install the spark plug Click here.

    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 SK16HR11

    4. Reference:


      1. A01EUH9E53
        Text in Illustration
        *a Spark plug electrode gap

        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.

        Note

        Never attempt to adjust the gap of a used plug.

        Electrode gap for a new spark plug
        1.0 to 1.1 mm (0.0394 to 0.0433 in.)
    5. A01EX6CE01

      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.