IGNITION SYSTEM ON-VEHICLE INSPECTION

PROCEDURE


  1. PERFORM SPARK TEST


    1. Check for DTCs.

      Click here

      Note

      If any DTCs are output, perform troubleshooting procedure for that DTCs.

    2. Remove the 4 ignition coil assemblies and 4 spark plugs.

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      Note


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

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

      Tech Tips

      Arrange the removed parts in the correct order.

    3. A00YNGT

      Disconnect the 4 fuel injector connectors.

    4. Put the engine in inspection mode (maintenance mode).

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    5. A00YQ2B

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

    6. Ground the spark plug.

    7. 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 power switch is pushed again for models with cranking holding function.

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

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

      Tech Tips


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

    8. A00YNGT

      Connect the 4 fuel injector connectors.

    9. Install the 4 spark plugs and 4 ignition coil assemblies.

      Click here

      Note


      • 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

      Install the same parts to their original positions.

    10. Check for DTCs.

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    11. Clear the DTCs.

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  2. INSPECT IGNITION COIL ASSEMBLY


    1. Check that the ignition coil assembly connector is securely connected.

      Result
      Result Action
      NG Connect securely
      OK Go to next step

    2. Perform a spark test.


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

      2. Perform the spark test again on each ignition coil assembly.

        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.


    1. A00YOWKC12
      *a Ground

      Check the electrode.


      1. Using a megohmmeter, measure the insulation resistance.

        Standard Insulation Resistance
        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 alternative inspection instead.

    2. A00YNC4

      Alternative inspection method:


      1. Put the engine in inspection mode (maintenance mode).

        Click here

      2. Start the engine.

        Note

        Do not perform this step when any of the following DTCs are output; P0300, P0301, P0302, P0303, P0304 (Cylinder Misfire Detected).

      3. Quickly accelerate the engine to 2500 rpm 5 times.

        Note

        Do not perform this step when any of the following DTCs are output; P0300, P0301, P0302, P0303, P0304 (Cylinder Misfire Detected).

      4. Remove the spark plug.

        Click here

      5. 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 threads and insulator.

      If there is any damage, replace the spark plug.

      Recommended Spark Plug
      Manufacturer Spark Plug Type
      DENSO SC20HR11
    4. A00YN22C11
      *a Spark Plug Electrode Gap

      Check the spark plug electrode gap.

      Maximum Electrode Gap for Used Spark Plug
      Electrode Gap
      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 spark plug.

      Electrode Gap for New Spark Plug
      Electrode Gap
      1.0 to 1.1 mm (0.0394 to 0.0433 in.)
    5. A00YPRF

      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 the 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.

    6. Install the spark plug.

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