IGNITION SYSTEM ON-VEHICLE INSPECTION


  1. PERFORM IGNITION COIL AND SPARK TEST


    1. Check for DTCs Click here.

      Note

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

    2. Check if sparks occur.


      1. Remove the ignition coils and spark plugs Click here.

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

      3. Disconnect the 4 injector connectors.

      4. Ground the spark plug.

      5. Visually check that sparks occur while the engine is being cranked.

        Note


        • Be sure to ground the spark plug when checking.

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

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

    3. Spark test procedure.


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

        Result
        Result Procedure
        NG Connect securely
        OK Go to next step

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


        • 1. Replace the ignition coil with igniter with a normal one.

        • 2. Perform a spark test again.

          Result
          Result Procedure
          NG Replace ignition coil with igniter
          OK Go to next step

      3. Check the spark plug.

        Result
        Result Procedure
        NG Replace spark plug
        OK Go to next step

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


        • 1. Turn the ignition switch to ON.

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

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

      5. Check the camshaft position sensor Click here.

      6. Check the crankshaft position sensor Click here.

    4. Connect the 4 injector connectors.

    5. Install the 4 ignition coils and 4 spark plugs Click here.

  2. 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. Check the electrode.


      1. A01DROKE02
        Text in Illustration
        *1 Ground

        Using a megohmmeter, measure the insulation resistance.

        Standard Insulation Resistance
        Tester Connection Condition Specified Condition
        Spark plug (Terminal) - Body ground Always 10 MΩ or higher

        Tech Tips

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

    2. 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 damage, replace the spark plug. If not, reinstall the spark plug.

      Recommended Spark Plug
      Manufacturer Spark Plug Type
      DENSO SK20HR11

    4. Check the spark plug electrode gap.

      Maximum electrode gap for used spark plug
      1.3 mm (0.0512 in.)

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

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

      Note

      When adjusting the gap of a new spark plug, bend only the base of the ground electrode. Do not touch the tip. Never attempt to adjust the gap of a used plug.

    5. A01DQJQE01

      Clean the spark plugs.

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

      Air pressure
      588 kPa (6.0 kgf/cm2, 85 psi)
      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.