IGNITION SYSTEM ON-VEHICLE INSPECTION

PROCEDURE


  1. PERFORM SPARK TEST


    1. Check for DTCs.

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      Note

      If any DTCs are present, perform troubleshooting in accordance with the procedure for each DTC.

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

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    3. A01T9OV

      Disconnect the 4 injector connectors.

    4. A01TB7N

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

    5. Ground the spark plug.

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

      Note


      • When performing the inspection, be sure to ground the hexagonal portion or the threaded portion of the spark plug.

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


        • For vehicles with a cranking hold function, turn the ignition switch off during cranking to stop cranking.

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

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

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

  2. INSPECT IGNITION COIL ASSEMBLY AND SPARK TEST


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


      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 on each ignition coil assembly.


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

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

      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 Action
          NG

          Inspect the ignition system

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          OK Replace spark plug

    2. Connect the 4 injector connectors.

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

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    4. Check for DTCs.

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      Tech Tips

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

    5. Clear the DTCs.

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  3. INSPECT SPARK PLUG

    Note


    • Do not use a wire brush for cleaning.

    • Never attempt to adjust the electrode gap of a used spark plug.


    1. A01TBBIC06
      *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) - 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. A01TA1F

      Alternative inspection method:


      1. 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).

      2. Quickly accelerate the engine to 4000 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).

      3. Remove the spark plug.

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      4. 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
      SC16HR11
    4. A01TB7CC06
      *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 electrode 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 electrode gap of a used plug.

    5. A01TBTG

      Clean the spark plug.

      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.