IGNITION SYSTEM ON-VEHICLE INSPECTION


  1. PERFORM SPARK TEST


    1. Check for DTCs.

      Note

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

    2. Check if sparks occur.


      1. Remove the ignition coils Click here.

      2. Remove the spark plugs.

      3. Install the spark plug to the ignition coil and connect the ignition coil connector.

      4. A01GIRY

        Disconnect the 2 fuel delivery pipe connectors.

      5. A01GMQ3E01

        Disconnect the 4 connectors with wire harness locks from the 2 injector drivers.

        Tech Tips

        To release each connector lock, push the claw downward ("Release" in the illustration) and move the lock lever ("Move" in the illustration).

      6. A01GJEN

        Ground the spark plug.

      7. Visually check that sparks occur 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 engine switch off during cranking to stop cranking.

        • If an ignition coil assembly is struck or dropped, replace it with a new one.

        • If a spark plug is struck or dropped, replace it with a new one.

  2. INSPECT IGNITION COIL AND SPARK PLUG


    1. Spark test flowchart.


      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. Check the power supply to the ignition coil with igniter.


        1. Turn the engine switch on (IG).

        2. Check that there is battery voltage at the ignition coil positive (+) terminal.

        Result
        Result Proceed to
        NG Check wiring between engine switch and ignition coil with igniter
        OK Go to next step

      4. Inspect the spark plug.

        Result
        Result Proceed to
        NG Replace spark plug
        OK

        Inspect the ignition system Click here

        Note


        • If an ignition coil assembly is struck or dropped, replace it with a new one.

        • If a spark plug is struck or dropped, replace it with a new one.

    2. Using a 16 mm plug wrench, install the spark plugs.

      Torque:
      21 N*m  { 214 kgf*cm, 15 ft.*lbf }
    3. A01GN7JE01

      Connect the 4 connectors with wire harness locks to the 2 injector drivers.

      Note

      Connect the connector securely.

      Tech Tips

      Move the lock lever in the direction indicated by the arrow to lock the connector.

    4. A01GIRY

      Connect the 2 fuel delivery pipe connectors.

    5. Install the ignition coils Click here.

  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. A01GN7AE18

      Check the electrode.


      1. Using a megohmmeter, measure the insulation resistance.

        Standard insulation resistance
        10 MΩ or more

        Tech Tips

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

    2. A01GL05

      Alternative inspection method:


      1. Start the engine.*

      2. Quickly accelerate the engine to 4000 rpm 5 times.*

        Note

        *: Do not perform this step if P0300 (misfire detection) or a related DTC is stored.

      3. Remove the spark plug.

      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. A01GN4IE01

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

      If there is any damage, replace the spark plug. If not, reinstall the spark plug.

      Recommended Spark Plug
      Manufacturer Product
      DENSO made FK20HBR11

      Tech Tips

      A01GJ7KE01

      Maximum electrode gap for a used spark plug: 1.4 mm (0.055 in.)

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

      Electrode gap for a new spark plug: 1.0 to 1.1 mm (0.039 to 0.043 in.)

      Note

      A01GNGRE01

      Never attempt to adjust the gap of a used plug.

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

      Standard air pressure
      588 kPa (6 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.